CH3NH2 gas induced (110) preferred cesiumcontainingperovskite films with reduced PbI6octahedron distortion and enhanced moisturestability

Citation:

Yue Chang, Li Wang, Jiliang Zhang, Zhongmin Zhou, Chongwen Li, Bingbing Chen, lioz etgar, Guanglei Cui, and Shuping Pang. 2/10/2017. “CH3NH2 gas induced (110) preferred cesiumcontainingperovskite films with reduced PbI6octahedron distortion and enhanced moisturestability.” J. Mater. Chem. A, 2017,5: 4803–4808.

Abstract:

We report here the discovery of a fancy interaction between cesium iodide (CsI) and methylamine (CH3NH2) due to the presence of the hydrogen bond. The formed CsI$xCH3NH2 is a liquid phase, which facilitates the large scale fabrication of highly uniform cesium-containing perovskite films with strong (110) preferred orientation by the CH3NH2 gas healing process. With this method, at most 10% nonpolar Cs cations could fully dope into the crystal lattice and extremely enhance the interaction of the inorganic framework with a more
symmetrical PbI6 octahedron, resulting in obvious improvement in moisture stability under continuous illumination.

Last updated on 12/05/2017