Air-Stable Thin Films of Tin Halide Perovskite Nanocrystals by Polymers and AlO Encapsulation.

Tin halide perovskites are promising for optoelectronics, although their sensitivity to ambient conditions due to Sn(II) oxidation presents a challenge. Encapsulation techniques can mitigate degradation and facilitate advanced studies of the intrinsic properties. To study and improve the ambient stability of CsSnBr and CsSnI nanocrystal (NC) thin films, we explored various encapsulation methods: organic, inorganic, and hybrid.