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Pressure-Induced Emission (PIE) of One-Dimensional Organic Tin Bromide Perovskites.

08:00 EDT 10th April 2019 | BioPortfolio

Summary of "Pressure-Induced Emission (PIE) of One-Dimensional Organic Tin Bromide Perovskites."

Low-dimensional halide perovskites easily suffer from the structur-al distortion associated with significant quantum confinement ef-fects. Organic tin bromide perovskite C4N2H14SnBr4 is an unique one-dimensional (1D) structure in which the edge sharing octahe-dral tin bromide chains [SnBr42-]∞ are surrounded by the organic cations C4N2H142+ to form the bulk assembly of core-shell quantum wires. Some unusual phenomena under high pressure are accord-ingly expected. Here, an intriguing pressure-induced emission (PIE) in C4N2H14SnBr4 was successfully achieved by means of diamond anvil cell. The observed PIE is greatly associated with the large distortion of [SnBr6]4- octahedral motifs resulting from a structural phase transition, which can be corroborated by in situ high-pressure photoluminescence, absorption, and angle-dispersive X-ray diffrac-tion spectra. The distorted [SnBr6]4- octahedra would accordingly facilitate the radiative recombination of self-trapped excitons (STEs) by lifting the activation energy of detrapping of self-trapped states. First-principles calculations indicate that the enhanced transition dipole moment and the increased binding energy of STEs are highly responsible for the remarkable PIE. This work will improve the potential applications in the fields of pressure sensors, trademark security and information storage.

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This article was published in the following journal.

Name: Journal of the American Chemical Society
ISSN: 1520-5126
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