通过调制激发波长，实现了Sb3+/Bi3+共掺杂Cs2ZrCl6双波段自俘获激子的可调谐发射

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-10 DOI:10.1016/j.jlumin.2025.121243

Weifeng Zhao , Feifei Ma , Tingting Zhang , Tianfu Gao , Haiyi Luo , Lanting Huang , Qingping Li , Bing Xu , Qinghua Li

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引用次数: 0

摘要

无铅钙钛矿具有优异的光电性能，在光电和光伏领域受到广泛关注。无铅钙钛矿衍生的自捕获激子（STEs）具有宽带发射和无自吸收的特性，广泛应用于照明、显示、辐射检测等领域。本文采用热沉淀法合成了Sb3+/Bi3+共掺杂的具有双带STEs发射的Cs2ZrCl6钙钛矿。优化激发波长和离子掺杂量有助于精确调整相对于发射波段的强度比。特别地，该研究获得了CIE （Commission Internationale de l'Éclairage）坐标为（0.33,0.34），显色指数（CRI）（Ra）值为83的白光发射。时间分辨和温度依赖的荧光光谱用于确定双波段发射之间的相互作用。这项工作揭示了双波段STEs发射的发光机制，并证明了其在多功能照明应用中的巨大价值。

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Achieving tunable dual-bands self-trapped excitons emission in Sb3+/Bi3+- codoped Cs2ZrCl6 by modulating the excitation wavelength

Lead-free perovskites exhibit excellent photoelectric properties, making them widely concerned in optoelectronic and photovoltaic fields. The broadband emission and self-absorption-free properties of lead-free perovskites-derived self-trapped excitons (STEs) are broadly applied in lighting, display, radiation detection and etc. Herein, Sb³⁺/Bi³⁺ codoped Cs₂ZrCl₆ perovskites with dual-band STEs emission are synthesized through thermal precipitation method. Optimizing excitation wavelength and ion doping amounts assisted in the precise adjustment of the intensity ratio with regard to the emission bands. Specially, the study acquired a white light emission with CIE (Commission Internationale de l'Éclairage) coordinates of (0.33, 0.34) and color rendering index (CRI) (Ra) value of 83. Time-resolved and temperature-dependent fluorescence spectra served for ascertaining the interactions between the dual-bands emission. This work reveals the luminescent mechanism underlying the dual-bands STEs emission and demonstrates its large value in versatile lighting applications.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.