Levent Gütay

TL;DR: In this paper, micro-resolved Raman investigations revealed local variations in the spectra that are attributed to a secondary phase (possibly Cu2SnS3S7), which exemplifies the abilities of micro-resolution Raman measurements in the detection of secondary phases.

TL;DR: In this paper, a ternary compound has been produced via the annealing of an electrodeposited precursor in a sulfur and tin sulfide environment, and the obtained absorber layer has been structurally investigated by X-ray diffraction and results indicate the crystal structure to be monoclinic.

TL;DR: In this article, the superior transport and lifetime properties of Cu-rich chalcopyrite semiconductors are discussed and the reason why solar cells are made from Cu-poor absorbers in spite of their inferior properties is the CdS/absorber interface which leads to high recombination in the case of Curich absorbers.

TL;DR: In this paper, the ability to quantitatively discriminate the most likely secondary phases ZnS and Cu2SnS3 from Cu2ZnSnS4 using common approaches but also using more complex and time-consuming Rietveld refinement analysis techniques to analyse X-ray diffractograms is investigated in a comparative study to the peak analysis of Raman spectra measured with standard conditions.

TL;DR: In this article, the authors show that the degradation of thin-film chalcogenide kesterite absorbers is universal and that the degraded surface of CZTSe absorbers contains grains of ZnSe.