1) Solar simulator with I-V measurement setup and software

Transcription

1 Department of Optoelectronics, University of Kerala, Kariavattom, Thiruvananthapuram, Kerala, India , Ph: OPTO/Nanophotonics-Phase II/P-1/ Quotation Notice Quotations are invited for the following items for the research purpose in the Department of Optoelectronics, University of Kerala, Kariavattom, Thiruvananthapuram. 1) Solar simulator with I-V measurement setup and software General specification: 1. The system should be fully integrated and enclosed for dust proof, safe operation and dark measurement. 2. The system should have collimated (parallel - sun like) light output ( ± 1 ) to avoid shadowing from the top contacts and should have a working distance of 15 cm from the output window of the simulator. We need 100 mw/cm 2 at the working distance. 3. The system should have corrections for irradiance fluctuations according to IEC The system should have reduced dependency of uniformity & intensity from working distance and uniformity < ±0.5 % over an area of 1 cm 2 to light intensity. 5. The system should have simple lamp replacement (exchanging integrated lamp, reflector & heat sink modules) with no need for realignment. 6. The system should have Non-reflective black finish of sample holder for reducing stray light. 7. The system should have various interlocks & sensors ensure operator safety. 8. The contact mechanism should be usable for both QE and Solar simulator IV measurement system 9. The system should have modular sample holder & contacting adapter design. 10. The system should have safety compliance should be according to ISO. 11. The system should be fully software controlled 12. The system should come with integrated PC (with operating system and software) with latest configuration. 13.Lamp life hour meter should be provided 14. Light intensity meter and Lamp current meter should be provided 15. Warning LED s for over voltage, over current and shorted Lamp warning, and safety Interlock override LED should be provided. 16. The shadow effect should be minimum and should have correction mechanism. 17. Calibrated reference cell (NREL certified) should be provided 1

2 Specifications 1 Type of lamp: Xenon Short Arc 2 Light Source: Steady State 500 W or better 3 Illumination Area: 5 cm X 5 cm or better 4 Air Mass: AM1.5G 5 Solar Class Class AAA 6 Spectral Match ASTM E927 7 Controller. Built in Micro Processor basedcontroller 8 Power Supply w/0.5% ripple, 220 VAC 50 Hz single phase 9 Reference Cell Calibrated NREL Features 1 Temporal long-term instability and shortterm instability should be < ±2% and < ±0.5% respectively 2 Collimation angle must be ± 1. 3 Light intensity feedback for stable output intensity 4 Safe lamp alignment mechanism Alignment with lamp off. 5 Lamp life 1000 hrs or better 6 Shutter control Manual and automatic with programmable shutter timer 0.1 sec. to 999 sec Software specifications 1 Software for illuminated I-V curve, dark I-V curve and reverse breakdown characteristic should be available. 2 Analysis and correction capabilities for following parameters: Voc, Isc, FF, Efficiency, Vmpp, Impp, Pmax, Rs, Rsh. 3 Corrections for temperature & irradiance fluctuations according to IEC Fitting of data to one diode model. 5 Data points per measurement: Reference cell database 7 Following user inputs should be available: Device name, cell area, scan speed &direction, voltage range, number of data points, comment. 8 Ability to perform hysteresis sweeps and start or stop at Voc 9 Ability to perform voltage, time measurements after light switch off (OCVD analysis) 10 Corrections for irradiance fluctuations according to IEC Software-programmable readjustment of solar simulator irradiance either continuously or before each IV measurement to ensure long-term stability. 12 Continuous irradiance stabilization by real-time closed-loop feedback control 13 Probes for measuring the thin films, Silicon Cells and Solar Cells. 2

3 I-V measurementspecifications 1 Voltage range: 0.4 milivolt to 20 V (resolution < 400 µv) 2 Current range: 0.2 microampere to 1A (resolution 200 na) 3 I-V measurement both manual and automated. Calibrated Reference Cell specifications 1 Solar Reference Cell consists of a 20mm x 20mm Monocrystalline Silicon Photovoltaic Cell 2 Encased in a rugged metal enclosure 3 Protective Quartz Window 4 Embedded Temperature Sensor (100 Ω Platinum Resistance Temperature Detector) 5 Certificate of calibration 6 Certified parameters: Isc, Imax, Voc, Vmax, Pmax, Area, Fill Factor (FF) and Efficiency 7 Certification is traceable to National Renewable Energy Laboratory (NREL). 8 Compatible set of connecting cables with four 4-point measurements of both current and temperature Optional Temperature Provision 0 deg to 60 deg with over Temperature alarm 1 Control facility 2 Temperature dependent I-V measurements 3 Automated and software controlled temperature scans with programmable temperature set-points 4 Automated determination of temperature coefficients α (Isc), ß (Voc), γ (Pmax). 5 Temperature dependent determination of all solar cell parameters 2) QE measurement system Specifications 1 System should be able to determine external quantum efficiencies of solar cells made of silicon, organic materials and Gratzel photovoltaic cells. 2 Additional lamp and optics for spectral illumination. 3 Grating monochromator with at least 3 gratings. 4 Source wavelength: nm with resolution: 0.5 nm and step size: 0.1 nm. 5 Focal length: 180 to 200 mm. 3

4 6 Two Dual-Phase Lock-Ins for simultaneous measurement of sample and monitor detector a. 0.7 µv/ C DC-Drift b. Frequency Range: 1 mhz 250 khz c. Synchronized with output signal of chopper. d. Fully software-programmable 7 Sample measurement data corrected by monitor detector data 8 Si &InGaAs based reference detector ( nm). 9 Rotating wheel-based optical chopper with frequency Range Hz. 10 Current Pre-Amplifier:Variable gain: 10³ 10 V/A, Switchable AC/DC mode, Bandwith DC 100kHz 11, Equivalent input current noise: 2 pa/vhz, Fully software-programmable 11 Current range and voltage bias range same as I-V measurement system Multi-crystalline silicon WPVS reference cell: 1 2 x 2 cm² polycrystalline Si solar cell encapsulated in black anodized housing with protective quartz window and two LEMO connectors (I-V & temperature) according to WPVS standard. 2 Calibrated for the following characteristics (including calibration certificate): a. Illuminated I-V Curve (Isc, Impp, Voc, Vmpp, Pmpp, FF, Efficiency) b. External Quantum Efficiency c. Spectral mismatch factor 3 The reference cell should be used for calibrating both QE and Solar simulator I-V measurement Software: 1 Software for illuminated I-V curve, dark I-V curve and reverse breakdown characteristic should be available 2 Analysis and correction capabilities for following parameters: Voc, Isc, FF, Efficiency, Vmpp, Impp, Pmax, Rs, Rsh 3 Corrections for temperature & irradiance fluctuations according to IEC Fitting of data to one diode model 5 Data points per measurement: Reference cell database 7 Following user inputs should be available : Device name, cell area, scan speed & direction, voltage range, number of data points, comment 8 Ability to perform hysteresis sweeps and start or stop at Voc 9 Corrections for irradiance fluctuations according to IEC Software-programmable readjustment of solar simulator irradiance either continuously or before each IV measurement to ensure long-term stability 11 Continuous irradiance stabilization by real-time closed-loop feedback control 12 Temperature dependent I-V measurements. 4

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