Mn2+–Mn2+ Magnetic Coupling Effect on Photoluminescence Revealed by Photomagnetism in CsMnCl3,The Journal of Physical Chemistry Letters

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Mn2+–Mn2+ Magnetic Coupling Effect on Photoluminescence Revealed by Photomagnetism in CsMnCl3
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-10-29 , DOI: 10.1021/acs.jpclett.0c02625
Xinglu Zhu ₁ , Suqian Meng ₁ , Yifei Zhao ₁ , Shuai Zhang ₁ , Jiang Zhang ₂ , Congling Yin ₃ , Shi Ye ₁

Affiliation

The magnetic coupling interaction of Mn²⁺–Mn²⁺ in Mn²⁺-included phosphors could induce a shorter emission decay time, compared with that of isolated Mn²⁺, which could overcome the photoluminescence (PL) saturation when stimulated by a high photon flux due to the long lifetime of the Mn²⁺ excited state. However, few studies have directly proved the Mn²⁺–Mn²⁺ coupling effect on the PL decay. In this paper, the effect on PL of CsMnCl₃ (CMC) and its hydrates is revealed by photomagnetism results, excluding the interference effects of site symmetry and phonon energy. The antiferromagnetic interaction of the CMC is larger when Mn²⁺ at a photoexcited state than at a dark state, which is contrary to the hydrates with weak Mn²⁺–Mn²⁺ interaction. This research not only helps researchers to understand the fundamental optical process but also is instructive for designing high performance Mn²⁺-doped phosphors in the field of displays and lighting.

中文翻译：

Mn ²⁺ –Mn ^2+的磁耦合效应对CsMnCl ₃中光磁的影响

Mn ²⁺ -Mn ²⁺在含Mn ^2+的荧光粉中的磁耦合相互作用比单独的Mn ²⁺可以诱导更短的发射衰减时间，当被高强度激发时可以克服光致发光（PL）饱和。 Mn ²⁺激发态的长寿命导致光子通量增加。但是，很少有研究直接证明Mn ²⁺ -Mn ²⁺耦合对PL衰变的影响。本文通过光磁学结果揭示了CsMnCl ₃（CMC）及其水合物对PL的影响，但不包括位对称性和声子能量的干扰作用。当Mn时，CMC的反铁磁相互作用较大在光激发状态下的²⁺比在暗状态下的²⁺，这与Mn ²⁺ -Mn ²⁺相互作用弱的水合物相反。这项研究不仅有助于研究人员了解基本的光学过程，而且对于设计显示器和照明领域的高性能Mn ²⁺掺杂磷光体具有指导意义。

更新日期：2020-11-19

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