Exciton-phonon coupling in alanine-based hybrid lead bromide

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Author(s):	Vasconcelos, Nailson ; Araujo, Bruno S. ; Abreu, Dieric S. ; Gomez, Mayra A. P. ; Ayala, Alejandro P. ; Paschoal, Carlos William A. Total Authors: 6
Document type:	Journal article
Source:	MATERIALS ADVANCES; v. 3, n. 23, p. 11-pg., 2022-09-16.
Abstract
Recently, hybrid metal-halide perovskite-like compounds have emerged as promising materials for optoelectronic applications. Such materials show optical properties that are usually tunable by the so-called perovskite dimensionality as well as octahedral distortion and connectivity. In this study, we have investigated the optical properties of an alanine-based 2D hybrid lead bromide with simultaneous edge- and corner-sharing [PbBr6](4-) octahedra. This compound has a large bandgap of 3.62 eV and broad photoluminescence, which are correlated through structural properties. Also, we showed that this emission exhibits a CCT of 3385 K corresponding to the "warm" white light emission characteristic of self-trapped exciton formation. Finally, we showed that the strong exciton-phonon interaction is the main mechanism of photoluminescence broadening. (AU)

FAPESP's process:	19/21939-0 - Bimetallic anisotropic nanoparticles (Au/Pd) for the study of catalytic processes through surface enhanced Raman scattering
Grantee:	Dieric dos Santos de Abreu
Support Opportunities:	Scholarships in Brazil - Post-Doctoral