Mn2+掺杂SrZnOS对快速压缩动态响应的振荡机械发光

IF 15.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Hao Wang, Tingting Zhao, Mei Li, Junlong Li, Ke Liu, Shang Peng, Xuqiang Liu, Bohao Zhao, Yanlong Chen, Jiao An, Xiaohui Chen, Sheng Jiang, Chuanlong Lin, Wenge Yang
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引用次数: 0

摘要

光子发射可以通过自恢复的机械发光(ML)从机械功中连续产生。在过去的几十年里,高性能ML材料取得了重大进展,但对速率相关的ML动力学仍然知之甚少。本文系统研究了Mn2+掺杂的SrZnOS (SrZnOS: Mn2+)在高达~10 GPa的快速压缩下的自恢复ML。在~1.2 GPa/s以下表现出扩散样的ML行为,在~1.2 ~ 1.5 GPa/s的临界速率下表现出一系列ML峰的振荡发射,而在1.5 GPa/s以上表现出抑制ML行为。从速率无关的结构演化和高压下的光致发光分析表明,临界速率下的振荡ML发射对应于多循环压电诱导激发(PIE)和自恢复过程。在临界速率下,PIE和自恢复过程的特征时间(τ)都最小,表明ML在快速压缩动态响应中的时间限制。高温对PIE略微有利,但对自恢复过程不利。本工作揭示了自恢复ML的时间特征,并为理解机械光子能量转换中速率依赖的ML动力学提供了见解,有助于基于ML的光电器件的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Oscillatory mechanoluminescence of Mn2+-doped SrZnOS in dynamic response to rapid compression

Oscillatory mechanoluminescence of Mn2+-doped SrZnOS in dynamic response to rapid compression

Photon emission may be continuously produced from mechanical work through self-recoverable mechanoluminescence (ML). Significant progress has been made in high-performance ML materials in the past decades, but the rate-dependent ML kinetics remains poorly understood. Here, we have conducted systematic studies on the self-recoverable ML of Mn2+-doped SrZnOS (SrZnOS: Mn2+) under rapid compression up to ~10 GPa. Rate-dependent distinct kinetics is revealed: a diffuse-like ML behavior below ~1.2 GPa/s, oscillatory emission with a series of ML peaks at critical rate of ~1.2–1.5 GPa/s, and suppression of ML above 1.5 GPa/s. Analysis from the rate-independent structural evolution and photoluminescence under high pressures show that the oscillatory ML emission at the critical rate corresponds to multi-cyclic piezoelectrically-induced excitation (PIE) and self-recoverable processes. Both characteristic time (τ) for the PIE and self-recoverable processes are minimized at the critical rate, indicating the time limit of ML in the dynamic response to rapid compression. High temperature is slightly favorable for PIE, but is unfavorable for the self-recoverable process. The present work uncovers the temporal characteristics of self-recoverable ML and provides insight into understanding the rate-dependent ML kinetics in the mechanical-photon energy conversion, conducive to the design of ML-based optoelectronic devices.

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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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