Surface passivation engineering strategy to fully-inorganic cubic CsPbI₃ perovskites for high-performance solar cells.

ABSTRACT: Owing to inevitable thermal/moisture instability for organic-inorganic hybrid perovskites, pure inorganic perovskite cesium lead halides with both inherent stability and prominent photovoltaic performance have become research hotspots as a promising candidate for commercial perovskite solar cells. However, it is still a serious challenge to synthesize desired cubic cesium lead iodides (CsPbI₃) with superior photovoltaic performance for its thermodynamically metastable characteristics. Herein, polymer poly-vinylpyrrolidone (PVP)-induced surface passivation engineering is reported to synthesize extra-long-term stable cubic CsPbI₃. It is revealed that acylamino groups of PVP induce electron cloud density enhancement on the surface of CsPbI₃, thus lowering surf

SUBMITTER: Li B 

PROVIDER: S-EPMC5852044 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature