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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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