Dynamic bandgap modulation in CsPbBr₃ perovskite nanocrystals through reversible ammonia intercalation.

ABSTRACT: Modulation of the electronic states of a semiconductor is an intriguing area of research because of its interesting applications. In general, physical methods are used to reversibly manipulate the bandgap of semiconductors. Herein, we have used a simple molecule, ammonia, and allowed it to intercalate inside the crystal lattice of CsPbBr₃ perovskites to alter the band positions. The molecular intercalation of ammonia induces strain in the crystal structure of perovskite, which widens the bandgap. Ammonia intercalation results in fall-off of the visible absorption and emission of the CsPbBr₃ perovskites and a new absorption emerges in the ultraviolet region. Interestingly, with time, the deintercalation takes place, as a result of the population in the antibonding orbi

SUBMITTER: Fausia KH 

PROVIDER: S-EPMC11792498 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature