Regulating Exciton Diffusion in Antimony‐Based Perovskite‐Like Single Crystals toward Highly Efficient and Stable Luminescence

Organic‐inorganic hybrid metal halide perovskite has played an important role in optoelectronics and photonics due to their extremely high photoluminescence quantum yield (PLQY). However, considering the strong nonmetallic property of antimony (Sb), the excitons in antimony‐based single crystals are...

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Bibliographic Details
Published in:Advanced optical materials 2023-11, Vol.11 (22)
Main Authors: Zhuang, Bihao, Jin, Zicong, Deng, Jiahuan, Xiong, Hui, Li, Wenzhe, Fan, Jiandong
Format: Article
Language:English
Subjects:
Antimony
Density functional theory
Electrons
Excitons
Hydrogen bonds
Luminescence
Materials science
Metal halides
Optical properties
Optics
Optoelectronics
Perovskites
Phosphors
Photoluminescence
Radiative recombination
Single crystals
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Summary:Organic‐inorganic hybrid metal halide perovskite has played an important role in optoelectronics and photonics due to their extremely high photoluminescence quantum yield (PLQY). However, considering the strong nonmetallic property of antimony (Sb), the excitons in antimony‐based single crystals are usually dissipated in the form of non‐radiative recombination under organic‐inductive effect, which leads to the low PLQY. Herein, two kinds of perovskite‐like single crystals, i.e., (8‐HQ) 2 SbCl 3 and (8‐HQH)SbCl 4 , are innovatively grown. The density functional theory (DFT) calculations reveal that the unique luminescence characteristics are associated with the inductive effect of organic coordination and exciton effect in the metal octahedral skeleton. When Cl − replaces the organic ligand in (8‐HQ) 2 SbCl 3 , the inductive effect is reduced while the self‐trapped exciton effect in the metal octahedron is enhanced. Besides, the theoretical research on electron transmission in a modeling device reveals that the hydrogen bond of organic A‐site in the single crystal promotes the transition of electrons. Based on the luminescent properties of (8‐HQH)SbCl 4 , the white LED devices are obtained by coating (8‐HQH)SbCl 4 and red phosphor on 450 nm LED chips.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.202300888