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Challenges of Irradiance-mode Spectral Response Measurements



Behrang H. Hamadani, John F. Roller, Brian P. Dougherty, Howard W. Yoon


Irradiance-mode spectral response measurements of solar cells are important because they provide a direct, reliable and accurate route for determination of the short circuit current (Isc) of solar cells under air mass 1.5 standard reference spectrum. In this work, a monochromator-based approach was combined with an LED array-operated system based on an integrating sphere design to obtain the irradiance-mode SR curves for a variety of cells, including large-area cells with dimensions up to 155 mm. Challenges associated with these measurements, including light uniformity, collimation issues and light bias effects are discussed. Isc calculations using this approach and intercomparison with other laboratories confirm the accuracy of the outlined methodology.
Conference Dates
June 8-13, 2014
Conference Location
Denver, CO
Conference Title
40th IEEE Photovoltaic Specialists Conference


solar cells, photovoltaics, measurements, spectral, spectral response, light emitting diodes


Hamadani, B. , Roller, J. , Dougherty, B. and Yoon, H. (2014), Challenges of Irradiance-mode Spectral Response Measurements, 40th IEEE Photovoltaic Specialists Conference, Denver, CO, [online], (Accessed July 15, 2024)


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Created October 16, 2014, Updated November 10, 2018