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A comparative study of subcell optoelectronic properties and energy losses in multijunction solar cells

Published

Author(s)

Sai Meghasena Chavali, John Roller, Mario Dagenais, Behrang Hamadani

Abstract

External luminescence quantum yields of subcells within several multijunction solar cells were measured using a calibrated hyperspectral imaging system in electroluminescence mode. The measurements allowed direct comparison of subcell device parameters using the electro-optical reciprocity relationship. In particular, differences in the open circuit voltages or even the shape of the current vs voltage curves under air mass 0 illumination among similar subcells can be correlated with the variations in luminescence yields. We compare energy losses among the different subcells and discuss how the differences in various loss terms affect the overall device performance. Some strategies to improve the overall solar cell device performance are further discussed.
Citation
Solar Energy Materials and Solar Cells

Keywords

photovoltaics, solar cells, solar energy, multijunction solar cells, electroluminescence, PV, quantum efficiency

Citation

Chavali, S. , Roller, J. , Dagenais, M. and Hamadani, B. (2021), A comparative study of subcell optoelectronic properties and energy losses in multijunction solar cells, Solar Energy Materials and Solar Cells, [online], https://doi.org/10.1016/j.solmat.2021.111543, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932863 (Accessed December 6, 2022)
Created December 11, 2021, Updated November 29, 2022