학술논문
All inorganic CsPbI3 perovskite solar cells with reduced mobile ion concentration and film stress
Document Type
Original Paper
Source
MRS Communications. 14(2):208-214
Subject
Language
English
ISSN
2159-6867
Abstract
Here, we study the impact of a polyvinylpyrrolidone (PVP) additive on cesium-based lead halide perovskites. We demonstrate the control of phase, morphology, film stress, and ion concentration under accelerated aging with the use of PVP in CsPbI3 . The addition of PVP in all-inorganic metal halide perovskites (MHP) further induces a residual compressive film stress, a factor that is correlated with improved film stability. The removal of PVP increased the stress based on a contraction in the film. Under thermal cycling, thermal aging, and light-induced aging, all-inorganic MHP films experienced negligible bandgap change and comparable ion behavior with and without PVP removal.Graphical abstract: