Chalcopyrite semiconductors are used in thin film solar cells with the highest efficiencies, in
particular for flexible solar cells. Recent progress has been made possible by an alkali …

The superior transport and lifetime properties of Cu-rich chalcopyrite semiconductors are
discussed. The reason why solar cells are made from Cu-poor absorbers in spite of their …

We investigate the performance of monolithic copper-indium-gallium-selenide
(CIGS)/perovskite tandem solar cells with two different CIGS bottom device absorbers: Cu …

Thin-film solar cell devices based on copper indium gallium diselenide (CIGSe)
chalcogenide materials fabricated by vacuum-based deposition techniques have already …

We report in this letter the contactless measurement of spatially resolved photocurrent–
photovoltage relationship. The method is based on hyperspectral imaging, from which we …

The quasi Fermi level splitting is measured for Cu (In, Ga) Se 2 absorber layers with different
copper to (indium+ gallium) ratios and for different gallium contents in the range of 20 …

The degradation of CuInSe 2 absorbers in ambient air is observed by the decay of the quasi-
Fermi level splitting under well defined illumination with time. The decay is faster and …

We present the effects of an In‐Se surface treatment of Cu‐rich ([Cu]/[In]> 1) CuInSe2
absorbers in order to utilize the superior transport properties of Cu‐rich absorbers for high …

We analyze photoluminescence (PL) and electroluminescence (EL) of a GaAs solar cell
using a hyperspectral imager that records spectrally resolved images. Thanks to the …

The absorbers in Cu (In, Ga) Se 2 solar cells in general are Cu-poor. However, better
transport properties and lower bulk recombination in “Cu-rich” material led us to develop “Cu …