DocumentCode :
122297
Title :
An arbitrarily programmable solar simulator based on a liquid crystal spatial light modulator
Author :
Dennis, Tasshi
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fYear :
2014
fDate :
8-13 June 2014
Firstpage :
3326
Lastpage :
3330
Abstract :
We describe the design, operation, and application of a programmable super-continuum solar simulator which incorporates a liquid crystal spatial light modulator to precisely control the spectral content within a prism-based spectrometer. Closed-loop operation of the simulator was used to optimize the output spectrum to match target profiles. Spectra are presented which simulate arbitrary irradiance profiles, an AM 1.5 solar reference spectrum, light biasing for multijunctions, and a dynamic light source for quantum efficiency measurements. Variable blue-rich and red-rich light-biasing spectra were used to demonstrate the current limiting behavior of a GaInP/GaAs tandem solar cell. The simulator light propagates as a beam with a single spatial mode, making it suitable for a variety of applications, including those that require a micrometer-scale focus.
Keywords :
gallium arsenide; indium compounds; solar cells; AM 1.5 solar reference spectrum; GaInP-GaAs; arbitrarily programmable solar simulator; arbitrary irradiance profiles; blue-rich light-biasing spectra; closed-loop operation; dynamic light source; light biasing; liquid crystal spatial light modulator; multijunctions; prism-based spectrometer; programmable super-continuum solar simulator; quantum efficiency measurements; red-rich light-biasing spectra; single spatial mode; tandem solar cell; Current measurement; Junctions; Laser beams; Lighting; Measurement by laser beam; Optical beams; Photovoltaic cells; liquid crystal; multijunction; photovoltaic cells; quantum efficiency; solar simulation; spatial light modulator; super-continuum laser;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialist Conference (PVSC), 2014 IEEE 40th
Conference_Location :
Denver, CO
Type :
conf
DOI :
10.1109/PVSC.2014.6925647
Filename :
6925647
Link To Document :
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