Short Course on Flexible Electronics Schedule

Transcription

1 DAY 1: Monday, 3 rd July, 2017 (Venue: Morning Session L-16, Afternoon Session L-14, Mixer-Ashiana) 8:30 9:00 Registration: outside L-16 at ground level Monica Katiyar : Introduction to Short Course on Flexible Electronics 9:00 09:30 09:30 10:00 Abstract: For last fifteen years, Samtel Centre for Display Technology (SCDT) has been conducting a summer short course in the field of organic/printable/flexible electronics. Introduction to this year s course will briefly discuss the scope of the field and history of the research activities at SCDT. We will discuss what to expect from this course. For last two years, National Centre for Flexible Electronics (NCFlexE) has been the centre of SCDT s research and development activities, and program of this year s course reflects this. The course is designed keeping in mind a broad audience consisting of graduate students, researchers, faculty and participants from the industry. About the speaker: Monica Katiyar is professor of Materials Science and Engineering at IIT Kanpur. She is currently Coordinator of Samtel Centre for Display Technologies and National Centre for Flexible Electronics established through a grant from Department of Electronics and Information Technology (DeitY) and support from IIT Kanpur. Prior to joining IIT, she has worked as senior device engineer at Motorola, Inc. Prof. Katiyar did her B.Tech. in Metallurgical Engineering from the Indian Institute of Technology, Kanpur in She completed her M.Eng. (1989) in Materials Science and Engineering from the McMaster University and Ph.D. (1994) from the University of Illinois at Urbana-Champaign. Her current research interests are in printable and flexible organic light emitting diodes and flexible batteries. Sudhindra Tatti : Opportunities in Flexible Electronics: Market Overview Abstract: Large area flexible electronics is an emerging segment of electronics that allows development of new applications by integrating intelligence in the form of electronics directly on flexible substrates such as plastics, paper, textiles or metal foils. This opens up new possibilities of developing conformal, flexible, lighter and more robust applications. At the heart of this revolution is electronics that can be printed rollto-roll by fast manufacturing processes, much the same way as newspapers are printed, thereby making the products much more affordable and if required, even disposable. The applications of flexible electronics are wide ranging and span several sectors. These include smart packages and labels for brand protection and anticounterfeiting, wearable and lightweight electronics, distributed energy production through organic solar cells on curved surfaces, disposable sensors or lab-on-a-chip for health monitoring, flexible batteries, flexible displays and energy efficient lighting. The talk will provide an overview of the potential applications, the approach and market related activities at the centre and some market projections. The centre is in the early stages of laying the foundation for promotion of manufacturing of flexible electronics in India. What will it take to create the eco-system of equipment suppliers, materials suppliers, requisite unit processes and components needed for domestic manufacturing? About the speaker: Dr. Sudhindra Tatti has a B. TECH from Indian Institute of Technology, Kharagpur. He obtained his Ph. D in Materials Science from University of Texas at Austin, U.S.A in Dr. Tatti has over 20 years experience in the semiconductor industry. He started his career at Motorola Semiconductor and has since worked in semiconductor foundries in Thailand and Singapore. He was also involved with Amberwave Systems, an MIT spin-off in Boston pioneering the commercialization of strained silicon technology. After almost twenty years abroad (U.S.A, Thailand and Singapore), Dr. Tatti has returned to India and founded Pegasus Semiconductor Limited with a vision to bring solar energy to the masses through adoption of new technologies. Dr.Tatti is passionate about entrepreneurship and commercialization of new technologies particularly oriented towards serving the rural masses of India. He is currently the COO of National Centre of Flexible Electronics at Page 1 of 11

2 10:00 10:30 High Tea IIT Kanpur. NCFlexE is a joint initiative of the Department of Electronics and Information Technology (DeitY) and IIT Kanpur for promotion of manufacturing of flexible electronics. His role at NCFlexE includes facilitating the collaboration opportunities with different entities in India to develop and commercialize technologies in area of Large Area flexible electronics. 10:30 11:15 James Watkins (Professor, UMass Amherst, USA) : Emerging Technologies for Rollto-Roll Fabrication of Electronic, Optical and Energy Devices: Can we print intelligent devices? 11:20 12:05 12:05 14:15 Lunch Break Abstract: Intelligent autonomous sensors for personalized health care and IOT applications present conflicting requirements of high degrees of performance at low cost. The current path employs hybrid integration, namely assembling silicon die and other components including batteries on substrates that contain printed connections and traces. This approach relies on a combination of unit operations common to printed and flexible electronics and pick and place technology for silicon die. The first part of the talk will review these approaches. There are a number of challenges to realizing the ultimate goal of a fully-printed intelligent device. One of the most significant is the development of additive methodologies for scalable direct printing of device structures at dimensions of less than 20 microns at high rate. In fact this limitation also applies to hybrid integration strategies. As one example, current designs for placement of thinned silicon die would benefit from the use of 20 micron pads, but these cannot be easily generated at reasonable speed using conventional approaches. The second part of the talk will describe the fabrication of advanced device structures via solution based processing. This requires the rapid and scalable creation of high integration density, nanoscale features in organic, hybrid and inorganic materials. Our approaches include nanoparticle driven self-assembly to produce periodic, wellordered polymer/nanoparticle hybrid materials with domain sizes ranging from less than 10 nm to more than 125 nm and nanoimprint lithography (NIL) for device scale patterning at length scales greater than 50 nm using nanoparticle/polymer hybrid inks. Examples of the application of NIL include the preparation graphene and copper contacts with sub-10 micron spacings for die attach and printed transistors and a new process that allows direct printing of patterned crystalline metal oxide films and composites with feature sizes of less than 100 nm. This approach is an attractive alternative to conventional subtractive processing using Si wafer-based platforms and can enable large area production of fully printed devices. The final part of the talk will review some of our application-oriented work. This includes the fabrication of microfluidic biosensor platforms, the development of advanced sensors and the creation of high energy and power density microbatteries. Additional applications in flexible electronics, light and energy management will also be discussed. About speaker: Jim Watkins is Professor of Polymer Science and Engineering and Director of the Center for Hierarchical Manufacturing, a National Science Foundation Nanoscale Science and Engineering Center (NSEC) at the University of Massachusetts, Amherst. Professor Watkins received his B.S. and M.S. degrees in Chemical Engineering from the Johns Hopkins University and his Ph.D. in Polymer Science and Engineering from the University of Massachusetts. He joined the Chemical Engineering faculty at UMass in 1996 and the Polymer Science and Engineering faculty in Y N Mohapatra: Basic components on Flexible 14:15 15:15 Abstract: Lecture-I & II : Basic Components & Architectures for Flexible Electronics This will be an introductory talk discussing the need for different approaches to realize electronic components on flexible substrates. The elementary processes involved in such components are very different from those in their Page 2 of 11

3 15:15 15:30 Tea Break counterparts in inorganic semiconductor applications. I will illustrate through case studies, the fundamental challenges and principles behind realization of conductors, capacitors, diodes and thin film transistors on flexible substrates. In doing so, I will touch upon topics relevant to organic semiconductors including carrier transport, optical properties, injection of carriers and their recombination mechanisms. I will also raise questions and process challenges that later speakers would address in more detail. About the speaker: Dr. Y. N. Mohapatra is a Professor in Physics and Materials science Programme Department. His research interest include semiconductors, electronic and photonic materials, OLED/PLED and Printable Electronics. 15:30 16:30 B Mazhari: TFT in Flexible Electronics 17:00 18:30 Mixer DAY 2: Tuesday, 4 th July, 2017 (Venue: Morning Session L-14, Afternoon Session SCDT and WL) Anshu Gaur : Vacuum processing for flexible electronics 08:45 10:00 Abstract: Vacuum based thin film processing is the center point of today s microelectronics processing technology. As we stand at the cusp of new paradigm in everywhere and for everyone electronics in form of Flexible Electronics ; two fundamentally different approaches can be utilized for processing of flexible electronic devices: printing and vacuum processing. While printing is one of the oldest technology known to humankind, its utilization in printing electronics is relatively new. On the other hand, vacuum based techniques are well understood for processing electronic materials (both organic and inorganic) and are widely utilized for non-flexible or rigid electronics. This lecture will cover some basic concepts in vacuum and vacuum based thin film deposition techniques and take a critical look at adaptation of these vacuum based techniques for flexible electronics including state of the art in Roll-to-Roll (R2R) vacuum deposition techniques. About the speaker: Dr. Anshu Gaur obtained hid PhD in Materials Science from University of Illinois at Urbana-Champaign, USA in Following his PhD, he worked in Applied Materials Inc., USA on development of amorphous oxide TFT back plane technology. He Joined Materials Science department at IIT Kanpur in July His research interests are in the area of carbon nanomaterials, amorphous oxide semiconductors, thin film devices and flexible electronics. S. Juliane Tripathi: Printing and coating 10:05 11:20 Abstract: Flexible electronics is a fast developing research field aiming at light-weight, low-cost, and large area applications like organic light emitting diodes (OLED) and organic photo voltaic (OPV). The required well defined thin layers need to be deposited pattern-wise and with high layer uniformity. Coating/printing and especially as Roll-toroll (R2R) processing at atmospheric conditions has the potential to meet the needs of layer homogeneity and cost efficient mass production. However, existing technologies of the printing and coating industry need to be stretched to fulfil the requirements of printed electronics. This short course will give an overview of solution deposition of functional layers for electronics. It will review several printing and coating principals suitable for electronics manufacturing and give a rough guideline how to select a technology. Film drying is an important part of the printing process. It can have a significant influence on product performance as well as production rate. Hence the drying process is as important as the coating process. It may even restrict the optimization of a coating process since drying considerations may dominate over coating ones. Hence, in this Page 3 of 11

4 11:20 11:40 Tea Break lectures we will have a brief look at the most common drying and curing methods and their fundamentals. About the speaker: Juliane Tripathi has a Ph.D. in Physical Chemistry from TU Dresden, Germany. After a post doc at the Leibniz Institute for Solid State and Materials Research Dresden, working on thin film electronics, she joint Holst Centre in the Netherlands as researcher in the field of Large Area Printing. Here she specialized on substrate-ink interaction and plasma treatment as well as R2R processing for printed electronics and yield control. At FlexE she is Team Leader for Printing & Coating and Printed Batteries. Ashish: Functional Inks 11:40 12:55 Abstract: Flexible electronics is a new area of electronics which allows us to embed intelligence in form of electronics on paper, textiles, plastic, metal foils. Printed electronics enable the large area electronics at low cost with high throughput. The motivation behind the printed electronic is to create large scale manufacturing of disposable electronics in a faster and cheaper way. The key enabler for printed electronics technology is the ability to design functional inks for specific application purposes, taking into consideration the nature of substrates and techniques of printing. In a sense, this capability is an essential requirement to print components such as conductors, resistors, semiconductors, dielectric and memory elements, just as traditional printing has inks for different colours. This ink can also be used to print interconnects, data lines and bus bars for applications in printed logic and printed active and passive matrix backplanes for applications such as OLED displays, TFT- LCDs, plasma displays and solar cells. All the specification of this conductive ink proposed here may not be true for all the application so this may be further tuned as per the product specification and the printing process. Which is specially done on the request of the specific applications. About the speaker: He did his Ph.D. in Chemistry from University of Allahabad in After working in Nagoya Institute of Technology, Japan, he moved to SCDT, IIT Kanpur in He worked for SCDT as a Research engineer from 2010 to Since 2015 he is working as Sr. Research engineer/team Leader in Flexible electronic center at IIT Kanpur. His research interest is functional inks for printed and flexible electronic. 12:55 14:00 Lunch Break 14:00 15:15 LAB DEMO- I 15:15 15:35 Tea Break 15:35 18:00 LAB DEMO- I DAY 3: Wednesday, 5 th July, 2017(Venue: Morning Session L-14, Afternoon Session SCDT and WL) Siddhartha Panda: Fluidics for printing 08:45 10:00 Abstract: This lecture provides an overview of the aspects of fluid mechanics with relevance to inkjet printing. The nature of the release of the ink droplets and the nature of the droplets play a key role in the printing process. Fluid mechanics, the study of the motion of fluid due to the effect of forces, helps understand the fundamental phenomena involved in the processes; and understanding the phenomena can be utilized to design improved and application specific processes. A brief overview of the inkjet printing is provided. The basic concepts of rheology, which describes the relation between force, deformation and time, are discussed. The stress-strain relationships in various non-newtonian fluids are discussed. Viscoelastic models are also discussed. The basics of fluid statics are then reviewed where the concept of Page 4 of 11

5 hydrostatic pressure is introduced, and buoyancy is discussed. The basics of fluid dynamics are reviewed. The conservation equations and constitutive equations discussed and examples of the velocity profiles for some flows are presented. Finally, the phenomenon of droplet formation is looked into; and the Plateau-Rayleigh instability which explains the break-up of a falling stream into droplets is discussed. About the speaker: Dr. Siddhartha Panda is currently a Professor of Chemical Engineering, and a participating faculty in the Materials Science Programme, and a Faculty Mentor in the National Centre for Flexible Electronics (NCFlex), at IIT Kanpur. His research focuses on chemical sensors for healthcare applications and the accompanying transport, reactions, transductions and materials processing, utilizing silicon and flexible printable platforms. Prior to joining IIT Kanpur, he was a Staff/Advisory Engineer at the IBM Semiconductor R&D Center, New York, for over six years. He obtained a Ph.D. from the University of Houston in 1999, an M.S. from the University of Cincinnati in 1995 and a B.Tech. from IIT Kharagpur in 1992, all in Chemical Engineering. S. Juliane Tripathi: Ink substrate interaction 10:05 11:20 Abstract: One of the important aspects of printing/coating is the wetting of the ink on the substrate. The performance of printed devices depends strongly on the properties of the deposited layer such as homogeneity and morphology. These parameters are largely controlled by the behaviour of the used ink on the confining surface. This lecture gives an insight into basic knowledge about surface energy and surface tension and the different models to describe the interactions. Measurement methods for both will be introduced. Further, models used to predict the short and long-term stability of liquid and dried films based on wettability, work of adhesion and interfacial tension will be discussed. Substrate - Ink interaction doesn t end after deposition and layer formation. Drying may either improve or degrade the properties of the deposited layers. It must be performed without adversely affecting the coating formulation or interfering with the physical uniformity of the coating. Hence we will briefly review what happens during drying. Finally we will look at common coating defects caused by unfortunate ink-substrate interactions and ways to optimise inks and substrates to avoid them. About the speaker: Juliane Tripathi has a Ph.D. in Physical Chemistry from TU Dresden, Germany. After a post doc at the Leibniz Institute for Solid State and Materials Research Dresden, working on thin film electronics, she joint Holst Centre in the Netherlands as researcher in the field of Large Area Printing. Here she specialized on substrate-ink interaction and plasma treatment as well as R2R processing for printed electronics and yield control. At FlexE she is Team Leader for Printing & Coating and Printed Batteries. 11:20 11:40 Tea Break Muralidharan Balakrishnan: OLED for lighting 11:40 12:55 Abstract: Lighting technologies have evolved from fire in the ancient world to electronic equipment in the present age. From the use of incandescent and fluorescent lamps there has been the recent major change to using light emitting diodes (LEDs), and now organic light emitting diodes (OLEDs) for commercial lighting products. OLED lighting has several advantages such as being thin, flat, lightweight, high color rendering index, potentially highly efficient, no harmful materials (Hg, etc.) and no UV emission. As a surface emitting source they can be operated at low luminous intensity to get the same luminous flux simply by increasing the emission area and can also be made flexible which not only opens a new array for innovative application areas but also reduces the production cost by enabling high throughput manufacturing processes like roll-to-roll. This talk begins with introduction to fundamentals of OLEDs and light emitting mechanism. Different kinds of OLED materials and stack architecture for white light generation are elaborated. Different fabrication processes and Page 5 of 11

6 12:55 14:00 Lunch Break 14:00 15:15 LAB DEMO- II 15:15 15:35 Tea Break 15:35 18:00 LAB DEMO- II performance enhancement techniques like p-i-n OLEDs and out-coupling are discussed in detail. Finally market trend and potential application areas of white OLEDs together with position of major players in lighting field are presented. Key issues relating to fabrication of large area OLED panels like origin of short-circuit, luminance non-uniformity etc. and ways to suppress them are discussed. About the speaker: Dr. Muralidharan Balakrishnan did his bachelors at NIT Trichy (2000) and masters at Technical University of Hamburg Harburg in Germany in Materials Science (2003). He did his PhD at University of Twente in Netherlands (2008) in the field of Electro-optical polymers which are used in the fabrication of electrooptical modulators used for electrical to optical signal conversion in optical communication. Later he also continued on with his Post Doc at Institute for Photonics Technologies in Germany working in the same field. Later he switched to industry and joined Novaled AG in Germany in 2009 and started working in the field of OLEDs. Later he took up a position as Project Leader at SEFAR AG in Switzerland in 2014 where he was involved in developing textile based flexible transparent conductive substrates for different optoelectronics applications including OLEDs. Since Aug 2016 he is leading OLED activities at NCFlexE where he is involved in the development of large area white OLEDs for lighting and flexible OLEDs for signage and packaging industry. DAY 4: Thursday, 6 th July, 2017 (Venue: L-14) Ashutosh K Tripathi: TFTs : From Device to Applications 08:45 10:00 10:05 11:20 Abstract: Thin-Film-Transistors (TFTs) are basic building blocks for any analogue or digital circuits. In this talk we will start from basic properties of materials used in high performance TFT fabrication. Subsequently we will describe fundamentals of TFT operation followed by processes and challenges in device fabrication and integration. Eventually, some current applications as well as future outlook will be presented. About the speaker: Dr. Ashutosh Tripathi is leading a group on flexible TFTs and circuits for various applications ranging from TFT arrays, e.g. backplanes for AMOLED displays, sensors arrays etc., to flexible circuits. Prior to joining FlexE Centre, Dr. Tripathi was with Holst Centre, The Netherlands where he was involved in development and technology transfer of high performance flexible TFT technology. He has broad research interest in the field of flexible as well as stretchable electronics, e.g. AMOLED displays, memory arrays, imager and wearable electronics. Siddhartha Panda:: Flexible Sensors Abstract: The lecture starts with an introduction on sensors and is followed by examples of physical and chemical sensors. Then the working modules of one type of sensors, gas sensors, are elaborated upon. The modules include transport of analytes to the receptor, the analyte-receptor reaction, transduction of chemical reaction to electrical signal, and processing of signals for pattern recognition. The transduction module is elaborated with discussions on the sensing materials and sensing mechanisms. Next the various performance parameters are discussed. Finally, some aspects of future research are highlighted Page 6 of 11

7 11:20 11:40 Tea Break 11:40 12:55 12:55 14:00 Lunch Break About the speaker: Dr. Siddhartha Panda is currently a Professor of Chemical Engineering, and a participating faculty in the Materials Science Programme, and a Faculty Mentor in the National Centre for Flexible Electronics (NCFlex), at IIT Kanpur. His research focuses on chemical sensors for healthcare applications and the accompanying transport, reactions, transductions and materials processing, utilizing silicon and flexible printable platforms. Prior to joining IIT Kanpur, he was a Staff/Advisory Engineer at the IBM Semiconductor R&D Center, New York, for over six years. He obtained a Ph.D. from the University of Houston in 1999, an M.S. from the University of Cincinnati in 1995 and a B.Tech. from IIT Kharagpur in 1992, all in Chemical Engineering. Monica Katiyar: Printed OLED Abstract: From the beginning, the most promising part of organic electronics was to be able to make devices solution processable and printable. Although organic light emitting diodes (OLEDs) are already being used in various display and lighting applications, the commercial technology is based on vacuum processes similar to inorganic semiconductor technology. The ultimate promise of printed device technology for OLEDs is yet to be realized commercially. In this lecture, we will discuss state-of-the-art of printed OLEDs. Research opportunities in the field and challenges related to materials, processes and device structure will be highlighted. Some examples will be given from the work done at NCFlexE. S. Sundar Kumar Iyer: Flexible PV 14:00 15:15 Abstract: In electronic systems built on flexible substrates, by including photovoltaic (PV) cells, the power harnessed from them could allow building more sophisticated systems with improved capabilities. There is also the potential for commercial applications of stand-alone PV systems implemented on flexible substrates. In this presentation, PV cells and modules implementation on flexible substrates are discussed. Initially, the basic operation principle of PV and the metric used to evaluate the devices and modules are presented. A plethora of PV technologies that are available and how they have been adapted for flexible substrates are then presented. In the last part of the presentation, implementation of organic solar cells on flexible substrates by different research groups are highlighted, concluding with a peek at the on-going efforts to build flexible PV modules at IIT Kanpur. About the speaker: S. Sundar Kumar Iyer is a faculty member in the department of electrical engineering at IIT Kanpur. His main area of research interest is organic solar cells. At the national centre for flexible electronics, he and the FlexPV team are involved in building solar cells and modules on flexible substrates that can be used for practical electronic systems. 15:15 15:35 Tea Break Subhasish Basu Majumder (Professor from IIT KGP): Batteries fundamentals 15:35 16:50 Abstract: Flexible electrochemical energy storages (FEES) are attractive power sources for flexible and wearable electronic devices. We have illustrated the material characteristics and design aspects of bendable, stretchable and compressible batteries supported by latest research and development efforts from different laboratories. The market prospects and efforts of commercialization of such batteries are reviewed. Finally, design issues of the construction of simple flexible battery prototypes are discussed and future prospects and outstanding research issues of flexible printed batteries are highlighted. Page 7 of 11

8 About the speaker: Professor Subhasish Basu Majumder joined the Materials Science Center, IIT Kharagpur in the year He did his B.Tech in Ceramic Technology from College of Ceramic Technology, Kolkata followed by M. Tech and Ph.D in Materials Science from IIT Kanpur. After completion of his Ph.D he briefly worked in Tata Refractory Limited at Belpahar, Orissa and then moved to the United States as a post doctoral fellow. Later he moved to Germany as Alexander von Humboldt Fellow and then joined IIT Kharagpur. His research area includes Li ion rechargeable battery, ferroic thin films, ceramic oxide gas sensors, fiber reinforced cement concrete and utilization of ceramic waste. He has published more than 160 research papers in International peer reviewed journals and till date supervised 10 Ph.D and 25 M.Tech students. He has been awarded MRSI medal from the Materials Research Society of India in the year Subhasish Basu Majumder (Professor from IIT KGP): Batteries on flex. Substrates 16:55 18:10 Abstract: Lithium ion batteries have been commercialized relatively recently as compared to lead or nickel based rechargeable batteries. In the present talk first we have described the application areas of lithium ion rechargeable batteries including the characteristic performance required for each of these applications. This is followed by the definition and measuring methods used in lithium ion batteries. The constructions of rechargeable cells and battery modules have been described briefly. Finally, various material aspects of high energy and power density electrode materials developed in the speaker s laboratory has been reviewed. About the speaker: Professor Subhasish Basu Majumder joined the Materials Science Center, IIT Kharagpur in the year He did his B.Tech in Ceramic Technology from College of Ceramic Technology, Kolkata followed by M. Tech and Ph.D in Materials Science from IIT Kanpur. After completion of his Ph.D he briefly worked in Tata Refractory Limited at Belpahar, Orissa and then moved to the United States as a post doctoral fellow. Later he moved to Germany as Alexander von Humboldt Fellow and then joined IIT Kharagpur. DAY 5: Friday, 7 th July, 2017 (Venue: L-14) Deepak: Flexible substrates 08:45 10:00 Abstract: The presentation includes various types of substrates that are in use in flexible electronics. These substrates are classified with respect to their structural types and also on the basis of other requirements such as optical clarity, coefficient of thermal expansion, shrinkage, temperature for processing, surface smoothness, barrier, chemical and moisture resistance, rigidity etc. About the speaker: Deepak obtained his B. Tech. degree in Metallurgical Engineering from the Indian Institute of Technology, Kanpur, in The graduate studies were completed in Materials Science and Engineering, with a M.S. in 1989 from the University of Florida, Gainesville, Florida (USA) and Ph. D. in 1993 from the University of California, Berkeley, California (USA). Following the graduate studies, he conducted a year-long Post-Doctoral work at the Argonne National Laboratory, Illinois (USA) and then another three years, beginning 1994, were spent in semiconductor device manufacturing and design at the Semiconductor Products Sector of Motorola Inc., Phoenix, Arizona (USA). Deepak joined IIT Kanpur at the end of 1997 as an Assistant Professor in the department of Materials Science and Engineering, where he works to this date. In between he took leave to work with Samtel Color Limited to indigenously develop passive matrix full color OLED displays Page 8 of 11

9 Research interests of Deepak are in large area flexible electronics Specifically, he researches organic light emitting diodes, thin film transistors and ferroelectric memories on flexible substrates. Ashutosh K Tripathi : Mechanical aspects of flexible and stretchable electronics 10:05 11:20 Abstract: Key requirement for flexible electronics devices is mechanical robustness. Flexible electronics represent hybrid or monolithically integrated electronic components on flexible substrates such as polymers, metal sheets, paper, textiles or even ultra-thin glass. As the name suggests, such a device is meant for applications where mechanical flexibility is required. As a consequence, these devices undergo induced mechanical strains during flexing/stretching operations. In this talk I will discuss mechanical aspects of flexible and stretchable electronics. Starting with fundamental mechanical properties of typical materials used in device fabrication, effect of mechanical strain on multi-layer device will be explained. Eventually, concept of mechanically robust flexible electronic devices, via stack engineering, will be presented. About the speaker: Dr. Ashutosh Tripathi is leading a group on flexible TFTs and circuits for various applications ranging from TFT arrays, e.g. backplanes for AMOLED displays, sensors arrays etc., to flexible circuits. Prior to joining FlexE Centre, Dr. Tripathi was with Holst Centre, The Netherlands where he was involved in development and technology transfer of high performance flexible TFT technology. He has broad research interest in the field of flexible as well as stretchable electronics, e.g. AMOLED displays, memory arrays, imager and wearable electronics. 11:20 11:40 Tea Break Muralidharan Balakrishnan: Encapsulation 11:40 12:55 Abstract: Most electronic devices need encapsulation (or packaging). For inorganic electronic devices such as integrated circuit chips, encapsulation is needed to protect the chips from external physical or chemical damages. For organic electronic devices, such as organic light-emitting diodes (OLED), organic photovoltaic devices (OPV) and organic thin-film transistors (OTFT), encapsulation is used not only to prevent external damage but also prolong the lifetime of organic devices, because most organic semiconductor materials tend to decay and lose their electronic properties upon contact with even tiny traces of water and oxygen. For organic electronic devices, the water vapor transition rate (WVTR) should be in the range of g/ m 2 /day, which is an extremely small amount to be allowed to penetrate through the encapsulation. Therefore, the encapsulation requirement in organic electronics is more stringent than conventional packaging for inorganic electronic devices. There are generally two types of encapsulation. One involves using a glass lids technique by which organic materials are encapsulated between two glass lids and only the edge of glass lids need to be well sealed with UV glue to stop water and oxygen permeation. The other technique is thin-film encapsulation (TFE) which is used particularly for flexible organic devices. TFE has to satisfy barrier properties, and also at the same time be flexible and transparent in some cases. Therefore encapsulation for flexible organic electronics becomes much more difficult. In this talk, different encapsulation techniques will be introduced, with particular emphasis on TFE. The characterization of barrier properties will be described, together with an overview of the current status in TFE technology worldwide and its future development trends. About the speaker: Dr. Muralidharan Balakrishnan did his bachelors at NIT Trichy (2000) and masters at Technical University of Hamburg Harburg in Germany in Materials Science (2003). He did his PhD at University of Twente in Netherlands (2008) in the field of Electro-optical polymers which are used in the fabrication of electrooptical modulators used for electrical to optical signal conversion in optical communication. Later he also continued on with his Post Doc at Institute for Photonics Page 9 of 11

10 12:55 14:00 Lunch Break Technologies in Germany working in the same field. Later he switched to industry and joined Novaled AG in Germany in 2009 and started working in the field of OLEDs. Later he took up a position as Project Leader at SEFAR AG in Switzerland in 2014 where he was involved in developing textile based flexible transparent conductive substrates for different optoelectronics applications including OLEDs. Since Aug 2016 he is leading OLED activities at NCFlexE where he is involved in the development of large area white OLEDs for lighting and flexible OLEDs for signage and packaging industry. Anshu Gaur: 1-D and 2-D material for flexible Electronics 14:00 15:15 Abstract: Low dimensional materials (1-D and 2-D materials) have gained a significant interest of research community in past 3 decades. These materials show unique electronic and optical properties due to quantum mechanical confinement effects. New 1-D/2-D materials and their unique properties are being reported everyday by research groups and their applications are being explored by academia and industry alike. By the virtue of their low dimensionality, they also exhibit extreme bendability and are promising candidates for flexible electronics. Their properties also can be tuned by controlling their size and processing. In this lecture, we would review some of the most common and upcoming low dimensional materials, their properties, processing and potential application areas in flexible electronics. We will also discuss state of the art devices and current research on 1-D and 2-D materials for flexible electronics. About the speaker: Dr. Anshu Gaur obtained hid PhD in Materials Science from University of Illinois at Urbana-Champaign, USA in Following his PhD, he worked in Applied Materials Inc., USA on development of amorphous oxide TFT back plane technology. He Joined Materials Science department at IIT Kanpur in July His research interests are in the area of carbon nanomaterials, amorphous oxide semiconductors, thin film devices and flexible electronics. 15:15 15:35 Tea Break 15:35 16:50 Devendra K. Maurya: Productisation of flexible sensors Abstract: Flexible sensors are attracting tremendous attention in recent years because of their potential applications in healthcare monitoring, wearable sensing, electronic skin (e-skin), environmental monitoring, food quality, structural health monitoring, safety, security and various other fields. In order to make flexible sensors ready for real world applications, they must pass through the different stages of technological maturity. Furthermore, I would like to elaborate on the fact that productisation is simply more than just developing new products. In this talk, I will start with the key application areas driving the multi-billion dollar flexible sensors market, followed by the productisation challenges faced by product development teams, potential solutions for these challenges and conclude with the process of assessing the maturity of a technology. About the speaker: Devendra Maurya is currently working as Team Leader at the National Centre for Flexible Electronics, IIT Kanpur. He is leading the Sensors Group, which is developing flexible sensors for various applications. He has over 17 years of academic and industrial experience in the fields of microsensors, flexible electronics, MEMS, microfluidic lab-on-chip devices and micro/nanofabrication. Before joining IIT Kanpur, he has worked at world-class universities, institutes and industries in Australia and Singapore. Devendra did his MS degree in Electronics Engineering from IIT Kharagpur. He has published over 39 peer-reviewed journal and conference papers with an h-index of 10. He is serving as an editorial board member, a guest editor, and as a reviewer for 12 international journals. 16:55 18:10 Question and Answer Page 10 of 11

11 DAY 6: Saturday, 8 th July, 2017 (Venue: L-14) 08:45 10:00 Deepak: New ideas and collaborations 10:05 11:20 Participants Time 11:20 11:40 Tea Break 11:40 12:55 Participants Time and Course Concluding interactions Page 11 of 11