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Time-resolved photoluminescence (TRPL) is a promising method for the investigation of charge carrier dynamics and recombination kinetics in semiconductor devices. To characterize Cu(In,Ga)Se2 (CIGSe) solar cells, we measured TRPL for different applied external forward voltages. We show that the TRPL decay time increases with increasing voltage in case of a high excitation intensity. This result is...
Co-evaporated Cu2ZnSnSe4 (CZTSe) is used to examine sensitivities to the device performance that originate from variations in Zn content very near the surface. While integral Zn content of the film is held approximately constant, the surface composition is manipulated via changes to the Zn flux at the end of the deposition. Surface composition, device performance, and open-circuit voltage extrapolated...
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