Aliovalent Doping-Induced Enhancement of Self-Trapped Exciton Emission in Ruddlesden–Popper Perovskite

Self-trapped exciton (STE) emission stands out for its large Stokes shift, broad emission spectrum, and high photoluminescence quantum yield (PLQY). In this work, we developed an Sb3+-doped low-dimensional layered halide, Cs2CdBr2Cl2, as a system to achieve efficient broadband emission. By fine-tuning the Sb3+ doping concentration, we induced moderate lattice distortion, resulting in a suitable Huang–Rhys factor (S = 18.00) and a high exciton binding energy (Eb = 144.73 meV), which collectively enabled strong yellow STE emission with a PLQY of nearly 80%. Experimental and theoretical investigations reveal that the emission originates from STE states associated with distorted [SbCl4Br2]3– octahedra. This highly efficient luminescent material, when combined with commercial phosphors, achieves a high color rendering index (Ra) of 90.8 and exhibits excellent radiation resistance and great potential for X-ray imaging applications.

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Publication Details

Journal
ACS Photonics
Published
2025-09-04
DOI
https://doi.org/10.1021/acsphotonics.5c01371
Citations
3
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
2.19

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article

Aliovalent Doping-Induced Enhancement of Self-Trapped Exciton Emission in Ruddlesden–Popper Perovskite

Shiguo Han, Xinxin Han, William W. Yu, Tongtong Kou et al.
3 citations
ACS Photonics
Perovskite Materials and Applications
2.19
article

Aliovalent Doping-Induced Enhancement of Self-Trapped Exciton Emission in Ruddlesden–Popper Perovskite

Shiguo Han, Xinxin Han, William W. Yu, Tongtong Kou, Qilin Wei, Xin Li, Liang Wang, Chang Tong
article en
3 citations

Abstract

Self-trapped exciton (STE) emission stands out for its large Stokes shift, broad emission spectrum, and high photoluminescence quantum yield (PLQY). In this work, we developed an Sb3+-doped low-dimensional layered halide, Cs2CdBr2Cl2, as a system to achieve efficient broadband emission. By fine-tuning the Sb3+ doping concentration, we induced moderate lattice distortion, resulting in a suitable Huang–Rhys factor (S = 18.00) and a high exciton binding energy (Eb = 144.73 meV), which collectively enabled strong yellow STE emission with a PLQY of nearly 80%. Experimental and theoretical investigations reveal that the emission originates from STE states associated with distorted [SbCl4Br2]3– octahedra. This highly efficient luminescent material, when combined with commercial phosphors, achieves a high color rendering index (Ra) of 90.8 and exhibits excellent radiation resistance and great potential for X-ray imaging applications.

ACS PhotonicsVol. 12(9)
Guangxi University (CN), Shandong University (CN), City University of Hong Kong, Shenzhen Research Institute (CN), Conversion Energy Enterprises (United States) (US), Life Cycle Engineering (United States) (US)
National Natural Science Foundation of China, China Postdoctoral Science Foundation, Natural Science Foundation of Shandong Province, Taishan Scholar Project of Shandong Province, Postdoctoral Innovation Project of Shandong Province, Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 11%
Perovskite Materials and Applications
2.19
DOISourceOpenAlex
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