Narrow‐Bandgap CsPbCl3:Mn2+ Ultralong Persistent Luminescence

IF 10 1区物理与天体物理 Q1 OPTICS

Laser & Photonics Reviews Pub Date : 2025-06-06 DOI:10.1002/lpor.202500873

Mingxing Li, Wenwu You, Shuanglai Liu, Jiacai Li, Huafang Zhang, Gencai Pan, Yanli Mao

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引用次数: 0

Abstract

The energy transfer mechanism following carrier de‐trapping in ion‐doped persistent luminescence (PersL) materials has remained poorly understood, mainly due to the absence of observable band‐edge exciton PersL in the host. Here, bright PersL in CsPbCl3:Mn2+ under X‐ray excitation, exhibiting remarkable longevity (>60 min at 200 K), is reported. Significantly, the direct bandgap nature of CsPbCl3 host enables clear observation of band‐edge emission, offering an unprecedented opportunity to investigate the elusive carrier transfer process from traps to emission centers. The results reveal that the PersL process is temperature‐dependent, primarily governed by a thermally‐assisted tunneling (TAT) mechanism, wherein energy is directly transferred from traps to Mn2+ centers. Only at cryogenic temperatures (77–120 K) do a minor fraction of electrons from shallow traps contribute weakly to PersL via conduction band release. This work advances the mechanistic understanding of PersL and offers a theoretical foundation for optimizing PersL materials.

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窄带隙CsPbCl3:Mn2+超长持续发光

在离子掺杂的持续发光（PersL）材料中，载流子脱陷后的能量转移机制仍然知之甚少，这主要是由于在寄主中没有可观测到的带边激子PersL。在X射线激发下，CsPbCl3:Mn2+中的亮PersL具有显著的寿命（200 K下60分钟）。值得注意的是，CsPbCl3宿主的直接带隙特性使得可以清晰地观察带边发射，为研究从陷阱到发射中心的难以理解的载流子转移过程提供了前所未有的机会。结果表明，PersL过程是温度相关的，主要由热辅助隧道（TAT）机制控制，其中能量直接从陷阱转移到Mn2+中心。只有在低温（77 - 120k）时，来自浅层陷阱的一小部分电子才会通过导带释放对PersL产生微弱贡献。这项工作促进了对PersL的机理认识，并为优化PersL材料提供了理论基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Laser & Photonics Reviews 物理-光学

CiteScore

14.20

自引率

5.50%

发文量

314

审稿时长

2 months

期刊介绍： Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.