Improving Stability of Cesium Lead Iodide Perovskite Nanocrystals by Solution Surface Treatments.

ABSTRACT: Cesium lead halide perovskite nanocrystals have a narrow emission peak tunable in the visible wavelength range with a high quantum yield. They hold great potential for optoelectronic applications such as light-emitting diodes or electronic displays. However, cesium lead iodide (CsPbI₃) is not stable under ambient conditions, limiting its applications. Here, we use a solution surface treatment approach to improve the photostability of CsPbI₃ suspensions in toluene. When a CsPbBr₃ precursor is used via the method of heterogeneous surface treatment, the photoluminescence (PL) intensity is enhanced but the PL only lasts 2 days. In contrast, when a CsPbI₃ precursor is used via the method of homogeneous surface treatment, not only the PL intensity of C

SUBMITTER: Li D 

PROVIDER: S-EPMC7391364 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature