Evolution of Cu(In,Ga)Se 2 surfaces under water immersion monitored by X‐ray photoelectron spectroscopy

Proceedings of the 18th European Conference on Applications of Surface and Interface Analysis (ECASIA '19), Dresden, Germany, September 15-20, 2019; International audience; Cu(In,Ga)Se2 absorbers were immerged in deionized water for different times, and specific chemical evolutions were monitored thanks to X-ray photoemission spectroscopy. Cu(In,Ga)Se2 related dissolution products were studied in water through induced coupled plasma optical emission spectroscopy. From those analyses, specific surface network disorganization was observed, with Cu migration towards the surface, leading to different kinetics of oxidation and dissolution for each element that could be quantified.