Institution:Shandong University

Title of Paper:3D Digital Holography Investigations of Giant Photostriction Effect in MAPbBr3 Perovskite Single Crystals

Journal:Advanced Functional Materials

Summary:The photoinduced physics always is a critical but controversial question for the new optoelectronic materials of halide perovskites. A high-quality MAPbBr3 single crystal is grown and the lattice expansion induced by variable power X-ray irradiation is investigated.A photoinduced deformation measurement system utilizing the off-axis holography technique is developed and constructed to measure and illuminate the global photo-induced deformation of MAPbBr3. Under a 473 nm laser with a power of 50 mW, MAPbBr3 exhibits an average maximum relative deformation of 1.27 × 10−3, demonstrating its remarkable photosensitivity and robust geometric response capabilities. Digital holography reveals photostriction as a localized phenomenon, reflecting the localization effect of the photogenerated carriers. The energetic and spatial transitions of those photogenerated carriers weaken the interatomic forces and in turn straighten the Pb─Br─Pb frameworks, expanding the lattice. This geometric change and the corresponding electronic impact are verified by Raman spectra, photoluminescence measurements, and first-principle calculations. The methods and results are significant for future research on light-induced phenomena in perovskites and other solid materials.

First Author:Liu Dong

Indexed by:Article

Document Code:2404995

Document Type:J

Volume:34

Issue:44

Translation or Not:No

Date of Publication:2024-10

Included Journals:SCI

Links to Published Journals:https://doi.org/10.1002/adfm.202404995

Release Time:2024-12-26

3D Digital Holography Investigations of Giant Photostriction Effect in MAPbBr3 Perovskite Single Crystals.pdf