Versatile light-emitting-diode-based spectral response measurement system for photovoltaic device characterization

Abstract

An absolute differential spectral response measurement system for solar cells is presented. The system couples an array of light emitting diodes with an optical waveguide to provide large area illumination. Two unique yet complementary measurement methods were developed and tested with the same measurement apparatus. Good agreement was observed between the two methods based on testing of a variety of solar cells. The first method is a lock-in technique that can be performed over a broad pulse frequency range. The second method is based on synchronous multifrequency optical excitation and electrical detection. An innovative scheme for providing light bias during each measurement method is discussed.

Large-area irradiance-mode spectral response measurements of solar cells by a light-emitting, diode-based integrating sphere source

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Frequency response of the external quantum efficiency in multijunction solar cells

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Absolute spectral responsivity measurements of solar cells by a hybrid optical technique

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Spectral response measurement apparatus for large area solar cells

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Differential spectral responsivity measurement of photovoltaic detectors with a light-emitting-diode-based integrating sphere source

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