Chalcopyrite solar cells achieve efficiencies above 23%. The latest improvements are due to
post‐deposition treatments (PDT) with heavy alkalis. This study provides a comprehensive …

Thin‐film solar cells have great potential to overtake the currently dominant silicon‐based
solar cell technologies in a strongly growing market. Such thin‐film devices consist of a …

Metal halide perovskites (MHPs) have become a widely studied class of semiconductors for
various optoelectronic devices. The possibility to tune their bandgap (Eg) over a broad …

Thin-film solar cells based on Cu (In, Ga) Se2 (CIGS) absorbers have achieved conversion
efficiencies close to 23%. Such a high performance could be reached by incorporating …

We report on the chemical structure of Cu (In, Ga) Se2 (CIGSe) thin-film solar cell absorber
surfaces and their interface with a sputter-deposited Ga2O3 buffer. The CIGSe samples …

The record conversion efficiency of thin-film solar cells based on Cu (In, Ga) Se 2 (CIGS)
absorbers has exceeded 23%. Such a high performance is currently only attainable by the …

Ambient-pressure Kelvin probe and photoelectron yield spectroscopy methods were
employed to investigate the impact of the KF and RbF postdeposition treatments (KF-PDT …

CdS has been known to be one of the best junction partners for Cu (In, Ga) Se2 (CIGS) in
CIGS solar cells. However, the use of thick CdS buffer decreases the short-circuit current …

The Cu-deficient CuxInSe∼ 2 (x> 0.3) phase can be stabilized as a thin film. A uniform Cu-
deficient composition with a chalcopyrite structure was obtained by the precision …

The electronic structure of a Ga-rich wide-gap CuIn0. 1Ga0. 9Se2 thin-film solar cell
absorber and its interface with a solution-grown CdS buffer layer were directly investigated …