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The operating efficiencies of multi-junction photovoltaic cells are sensitive to changes in the spectral distribution of solar irradiance. To examine how this affects their performance in the field, two sets of triple-junction photovoltaic cells with different spectral responses are being characterised side-by-side outdoors. Initial analyses of the measurements have revealed seasonal differences between...
Alta Devices has fabricated a thin-film single-junction GaAs module with an independently confirmed solar energy conversion efficiency of 23.5%, under the global AM1.5 spectrum at one sun intensity. This represents a new record for terrestrial modules under non-concentrated sunlight. Reduced shading, intrinsic electrical interconnect, optimized optical coupling, and high efficiency solar cells all...
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