Integrated optical sensor modules with organic components
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1 Integrated optical sensor modules with organic components Georg Jakopic Institute of Nanostructured Materials and Photonics Joanneum Research, Weiz 1 ISOTEC Meeting; Semmering,
2 Sensor Goal: Base: Integrated sensor for different analytes and applications Detector = Organic Photo Diode (OPD) Excitation source = Organic Light Emitting Diode (OLED) 2 approaches: Waveguide design Sandwich design
3 Oxygen sensor based on phosphorescence Principle Measurement of phosphorescence lifte time via phase modulation Relation between life time and oxygen concentration by Stern Volmer equation: P O = 1 τ 0 1 K 2 τ SV P 02.Partial pressure of oxygen K SV...Stern Volmer Constant τ 0... Phosphorescence lifetime of dye without oxygen Reference LED inlet τ... Phosphorescence lifetime of dye with partial pressure P O2 of oxygen Cable connector Sample Photodetector outlet Processing electronics Dimensions: 120x60x30 mm Sensormembrane Signal LED Aluminium housing Optical filters
4 Integration models Realisation of integrated organic Sensor 2 models Sandwich Design: Waveguide Design: Sandwich-Design OPD Linear Polarisation-cross Sensor Dye Linear Polarisation OLED OLED Waveguide Waveguide-Design Filter OPD Dye
5 Demands on the optoelektronic devices: OLED Oxygen sensor with PtTFPP: Excitation of dye possible at wavelengths 400nm, 508nm or 540 nm Amine sensor with eosine derivate: excitation at 550 nm ph-sensor with fluorescine: excitation at 520nm Design: Organic light emitting device (OLED): Au / NPD / Alq 3 / Al green emitting OLED Au / TPD / Sexiphenyl / Al blue emitting OLED
6 Setup of NPD/Alq 3 OLED Configuration: Alq 3 /NPD Elektron transport and emitter material: Alq 3 : Aluminium tris(8-hydroxyquinoline). Peak of emission at 520nm Hole transport layer: NPD: N,N`-bis(1 naphthyl)- N,N`-diphenyl diphenyl-1,1`-biphenyl-4,4`diamine Elektrodes: ITO (indium tin oxide) or Au (Gold), Al (Aluminum) or Ag (Silver( Silver) Al Alq3 NPD ITO
7 Setup of NPD/Alq 3 OLED Elektroluminescence spektrum Broad emission spektrum Comprises the excitation wavelength of of eosine-derivate (550nm), PtTFPP (508nm, 540nm) and fluorescine (520nm) Intensity Electroluminescence spectrum PtTFPP EOSIN PtTFPP NPD/Alq OLED-Waveguide Waveguide-System Fluorescin Wavelength (nm)
8 Configuration: TPD/6P Emitter material: Setup of TPD/6P OLED 6P: para-hexaphenyl. Peak of emission at 425nm Hole transport layer: TPD: N,N-diphenyl diphenyl-n,n N,N -(3-methylphenyl) -1,1 1,1 -biphenyl- 4,4 -diamine Responsible for extension of emission spectrum short wave range (~400nm) Elektrodes: ITO (indium tin oxide) or Au (Gold) or Al (Aluminium) Al 6P TPD ITO
9 Setup of TPD/6P OLED Elektroluminescence spektrum Comprises excitation wavelength of PtTFPP (400nm) Intensity Electroluminescence spectrum EOSIN PtTFPP PtTFPP TPD / 6P OLED-Waveguide Waveguide-System Fluorescin Wavelength (nm)
10 Waveguide Design Excitation with ready-made OLEDs (IPMS) rel. Intensity [a.u.] Electroluminescence Elektrolumineszenzspektrum spectrum von of IPMS green OLED OLED 1400 PtTFPP PtTFPP 1200 Eosin rel. Intensity [a.u.] Electroluminescence Elektrolumineszenzspektrum spectrum von of IPMS blue OLED OLED PtTFPP PtTFPP blaue OLED Eosin wavelength [nm] Fluorescin Fluorescin wavelentgh [nm] Fraunhofer-Institut; Photonische Mikrosysteme
11 Demands on optoelektronic devices: OPD Supression of excitation ligth Detection of phosphorescence at 650nm PtTFPP (O 2 -sensor) Detection of fluorescence at 560nm eosine-derivate (amine( amine-sensor) Detection of fluorescence at 540nm fluorescine (ph-sensor) Design: Organic Photodiode (OPD): OPD Linear Polarisation-cross Sensor Dye Linear Polarisation OLED Polfilter/ Ormocer/ / Cr/ Au/ CuPc/ PTCBi/ / Alq 3 / Ag sensitive in visible range Glass/ LEE Filter/ Ormocer/ / Cr/ Au/ CuPc/ PTCBi/ Alq 3 / Ag sensitive in red range OLED Waveguide Filter OPD Dye
12 Configuration of CuPc-PTCBi PTCBi OPDs Substrate/Ormocer Ormocer/ / Cr/ Au/ CuPc/ PTCBi/ / Alq 3 / Ag Ag Alq 3 PTCBi CuPc Cr/Au Ormocer Substrat N N O N N N N Cu N N N N External quantum um efficien iency O N N Quantum efficiency (%) Externe Quanteneffizienz cy EQE Wavelength (nm)
13 Configuration CuPc-PTCBi PTCBi OPDs with Filter Waveguide Design Isopropanole Extraction of dye from aus der LEE-Fo Foil Deep Golden Amber Transmission (%) Transmission Transmission LEE Filter "DEEP GOLDEN AMBER" blaue OLED grüne OLED EOSIN Derviat PtTFPP Wellenlänge[nm] External quantum efficiency OPZ Quantum Efficiency [%] NMP opd QE [%] NMP opd (λ-selective) QE [%] wavelength [nm]
14 Configuration of CuPc-PTCBi PTCBi OPDs on polp ol-filter Sandwich Design Transmission of polarisation filters OPDs on pol-filter foil LPG33
15 Realisation of integration models Sandwich-Design Waveguide-Design
16 Sensor Approach I Waveguide Excitation source OLED: Alq 3 / NPD structure 6P / TPD structure Detektor OPD: CuPc/PTCBi PTCBi structure Wellenlength ength separation: LEE filter foil (Deep Golden Amber) Waveguide = Substrate
17 Sensor Approach Waveguide Proof of principle sensitive dye
18 Waveguide Design Proof of Principle II OLEDs OPDs Substrate Waveguiding first integrated device Excitation: OLED (green)( Detector: : OPD
19 Sensor Approach Waveguide Pros and cons Simple geometry Only for large Stokes Shifts 2 filters necessary broad spektrum of Alq3/NPD OLEDs
20 Sensor Approach Sandwich I Setup Excitation source OLED: Alq3/ NPD structure on polarisation filter 6P/ TPD structure on polarisation filter Detector OPD: CuPc/PTCBi structure on polarisation filter Separation of wavelengths: Crossed linear polarisers
21 Sandwich Design Proof of Principle Detector Linear Polarisation-cross PtTFPP-Sensor LED ~400nm Linear Polarisation
22 Sensor Approach Sandwich Proof of principle- PtTFPP, Eosine derivat Green OLED OPD on pol-filter-foil (LPG33, ITOS)
23 Sensor Approach Sandwich Proof of principle- Fluorescine Blue OLED Blue OLED Color filter BG28
24 Sensor Approach Sandwich Proof of principle- Fluorescine ph sensitive dye: Fluorescine in Ethanole Blue OLED OPD on pol-filter
25 Sandwich Design OLED on pol-filter filter elektroluminescence spektrum OLED on pol-filter + PtTFPP/Polystyrole Alq 3 /NPD OLED on pol-filter as excitation source for PtTFPP Absorption at 508nm und 540nm
26 Sensor Approach Sandwich III Pros and cons No big Stokes shift required Demonstrated for Oxygen and Amines Good separation of excitation and emission wavelength Patent submitted Difficult adjustment non-homemade polarisers
27 ! " # $ %! &' ()
28 Thank you for your attention! 28 ISOTEC Meeting; Semmering,
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