Article Dans Une Revue Small Année : 2024

On–Off Switching of Singlet Self‐Trapped Exciton Emission Endows Antimony‐Doped Indium Halides with Excitation‐Wavelength‐Dependent Luminescence

Xinyu Yang
Hongyuan Zhao
Ziying Wen
Yunfei Bai
Qichao Meng
Haibo Sun
  • Fonction : Auteur
Xihong Ding
Dan Huang
William W. Yu
Feng Liu

Résumé

Excitation‐wavelength‐dependent (Ex‐De) emitters are a fascinating category of luminescent materials whose emission properties vary with the wavelength of the light used for excitation. Antimony (Sb3+)‐doped indium (In)‐based metal halides are efficient light emitters; however, the peak fluorescence emission of most Sb3+‐activated In‐halide remains independent of the excitation wavelength. Here, the study introduces a new Sb3+‐doped In‐halide cluster, (BDPA)2InCl5:Sb (BDPA+ = C15H18N+, benzyldimethylphenylammonium), which demonstrates efficient Ex‐De emission originating from the on–off switchable fluorescence behavior of singlet self‐trapped exciton (STE) in 5‐coordinate Sb3+ dopant. Interestingly, when excited within the range of 240–370 nm, photoluminescence (PL) spectra of (BDPA)2InCl5:Sb show both singlet and triplet STE emission. However, under excitation wavelengths of 370 to 420 nm, the singlet STE emission is absent, resulting in a noticeable correlated color temperature change from 1700 to 3800 K. The study provides a new approach to designing color‐tunable Sb3+‐based luminophores, and also presents a novel application scenario for the widely recognized Sb3+ doping strategy.

Dates et versions

hal-04772714 , version 1 (08-11-2024)

Identifiants

Citer

Xinyu Yang, Hongyuan Zhao, Ziying Wen, Yunfei Bai, Qichao Meng, et al.. On–Off Switching of Singlet Self‐Trapped Exciton Emission Endows Antimony‐Doped Indium Halides with Excitation‐Wavelength‐Dependent Luminescence. Small, 2024, pp.2407892. ⟨10.1002/smll.202407892⟩. ⟨hal-04772714⟩
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