Single‐Component White Circularly Polarized Luminescence in Chiral 1D Double‐Chain Perovskites

Circularly polarized luminescence (CPL) with polychromatic colors has been widely studied due to its great applications in chiroptical, optoelectronics, and spintronics. However, the realization of white CPL in single‐component solid‐state materials remains a great challenge and suffers from the inc...

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Bibliographic Details
Published in:Advanced optical materials 2023-02, Vol.11 (4), p.n/a
Main Authors: Chai, Chao‐Yang, Zhang, Qing‐Kai, Jing, Chang‐Qing, Han, Xiang‐Bin, Liu, Cheng‐Dong, Liang, Bei‐Dou, Fan, Chang‐Chun, Chen, Zhong, Lei, Xiao‐Wu, Stroppa, Alessandro, Agbaoye, Ridwan Olamide, Adebayo, Gboyega Augustine, Zhang, Chun‐Feng, Zhang, Wen
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Asymmetry
Chains
chiral perovskites
Chirality
Circular polarization
circularly polarized luminescence
Density functional theory
Divalent cations
Emitters
Excitons
Hydrogen bonds
Incompatibility
Light emitting diodes
Luminescence
Materials science
Optics
Optoelectronics
Perovskites
Photoluminescence
self‐trapped excitons
single‐component white light emission
Spintronics
transient absorption spectroscopy
White light
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Summary:Circularly polarized luminescence (CPL) with polychromatic colors has been widely studied due to its great applications in chiroptical, optoelectronics, and spintronics. However, the realization of white CPL in single‐component solid‐state materials remains a great challenge and suffers from the incompatibility between high efficient luminescence and large asymmetric discrimination. Here, by exploiting self‐trapped exciton mechanism and chirality induction strategy, a pair of 1D chiral perovskites, (RR/SS‐DMPZ)PbBr4 (where DMPZ = cis‐2,5‐dimethylpiperazine divalent cation), is reported to achieve white CPL with both high quantum yield of 28.4% and large photoluminescence asymmetry factor |glum| of 2.32 × 10−2. The crystal structures are featured by 1D double‐chain structure composed of distorted octahedra with short PbPb distances as the structural origin of the high photoluminescence yield. The high |glum| value is caused by efficient chiral induction due to the multiple hydrogen bonds between the chiral host composed of the enantiopure organic cations containing two stereocenters and the inorganic emitting guest. The self‐trapped exciton emission mechanism is demonstrated by density functional theory calculations and variable‐temperature photoluminescence and femtosecond‐transient absorption spectroscopy studies. The photo‐luminescent white light‐emitting diodes exhibit good stability and can be used as single‐component white light emitters. This work provides applicable strategies to explore single‐component white CPL emitters. A pair of single‐component circularly polarized white light emitters with an ultra‐broadband emission are successfully synthesized. The white circularly polarized light emission originates from the self‐trapped exciton mechanism. The perovskite enantiomers with a double 1D chain exhibit excellent performance with a high quantum yield (28.4%) and large photoluminescence asymmetry factor (2.32 × 10−2).
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.202201996