Distinct Excitonic Emissions in 2D (C₇ H₇ N₂ )₂ PbX₄ (X = Cl, Br) under Compression.

ABSTRACT: Two dimensional (2D) hybrid metal halides (HMHs) usually exhibit free excitonic (FE) emission, and self-trapped excitonic (STE) emission can also be achieved by adopting appropriate halogens and organic cations. Recently, significant efforts have been made to modulate and then clarify the transformation and connection between these two types of excitonic emissions in 2D HMHs. In this study, intriguing pressure-tuned transitions between FE emission and STE emission are observed in 2D (C₇ H₇ N₂ )₂ PbCl₄ . In contrast, only FE emissions with tunable emission energies are observed in 2D (C₇ H₇ N₂ )₂ PbBr₄ which possesses a similar structure with (C₇ H₇ N₂

SUBMITTER: Zhang H 

PROVIDER: S-EPMC10811510 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature