Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand.

ABSTRACT: A detailed picture of temperature dependent behavior of Cs_xFA_1-xPbI₃ perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site chemical composition and surface ligand binding. The thermal degradation mechanism depends not only on the exact chemical composition, but also on the ligand binding energy. The thermal degradation of Cs-rich perovskite quantum dots is induced by a phase transition from black γ-phase to yellow δ-phase, while FA-rich perovskite quantum dots with higher ligand binding energy directly decompose into PbI₂. Quantum dot growth to form large bulk size grain is observed

SUBMITTER: Wang S 

PROVIDER: S-EPMC10113222 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature