Bingcheng Yu

Abstract: Besides widely used surface passivation, engineering the film crystallization is an important and more fundamental route to improve the performance of all-inorganic perovskite solar cells Herein, we have developed a urea-ammonium thiocyanate (UAT) molten salt modification strategy to fully release and exploit coordination activities of SCN- to deposit high-quality CsPbI3 film for efficient and stable all-inorganic solar cells The UAT is derived by the hydrogen bond interactions between urea and NH4 + from NH4 SCN With the UAT, the crystal quality of the CsPbI3 film has been significantly improved and a long single-exponential charge recombination lifetime of over 30 ns has been achieved With these benefits, the cell efficiency has been promoted to over 20 % (steady-state efficiency of 192 %) with excellent operational stability over 1000 h These results demonstrate a promising development route of the CsPbI3 related photoelectric devices

TL;DR: In this article , the thermal stability of low-dimensional perovskites based on three hydrophobic organic ammonium salts and their passivation effect toward CsPbI3 and the whole device performance were investigated.

TL;DR: In this paper , a dual-functional additive consisting of organic ammonium cation and dithiocarbamate anion was developed to regulate the crystallization and defects of the FA-Cs perovskite film.

TL;DR: In this article, a two-step multiple spin coating method has been developed for the first time to prepare cesium halide perovskite films in particular, dimethyl sulfoxide (DMSO) is introduced into CsBr/methanol precursor solution to increase the solubility of csBr; in the meantime, it can also remarkably influence the morphologies, optical properties and photovoltaic performance of CsPb(IxBr1−x)3 (0 < x < 1) films.