Effects of Pressure on Exciton Absorption and Emission in Strongly Quantum-Confined CsPbBr₃ Quantum Dots and Nanoplatelets.

ABSTRACT: Soft lattices of metal halide perovskite (MHP) nanocrystals (NCs) are considered responsible for many of their optical properties associated with excitons, which are often distinct from other semiconductor NCs. Earlier studies of MHP NCs upon compression revealed how structural changes and the resulting changes in the optical properties such as the bandgap can be induced at relatively low pressures. However, the pressure response of the exciton transition itself in MHP NCs remains relatively poorly understood due to limitations inherent to studying weakly or nonconfined NCs in which exciton absorption peaks are not well-separated from the continuum interband transition. Here, we investigated the pressure response of the absorbing and emitting transitions of excitons using strongly quantum-

SUBMITTER: Wang CW 

PROVIDER: S-EPMC10860125 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature