Lanthanum-induced synergetic carrier doping of heterojunction to achieve high-efficiency kesterite solar cells

Abstract

We introduced La to realize a synergetic doping of the CdS/kesterite heterojunction to overcome the carrier concentration limit of kesterite solar cells and achieved a high efficiency of 13.9%.

A critical review of solution-process engineering for kesterite thin-film solar cells: current strategies and prospects

“…The enhancement of heterojunction interface electrical properties and reduction in photogenerated carrier recombination ultimately resulted in a cell efficiency of 13.9%. Additionally, a high efficiency of 22% was achieved for CZTSSe devices under conditions of 130 K, 116 as shown in Fig. 9c and d.…”