Enhancing photoluminescence of manganese chloride perovskite-analogues through phase transformations induced by Sn incorporation
Enhancing photoluminescence of manganese chloride perovskite-analogues through phase transformations induced by Sn incorporation
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DOI：
10.1016/j.jlumin.2022.119613
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发表时间：
2022-12
影响因子：
3.6
通讯作者：
Qian Meng;Liuyun Chen;Liang Jing;Q. Pang;J. Z. Zhang
中科院分区：
文献类型：
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作者：
Qian Meng;Liuyun Chen;Liang Jing;Q. Pang;J. Z. Zhang
本文采用酸溶法在高湿度条件下合成了一维Sn掺杂的CsMnCl 3微晶。制备的CsMnCl 3（H2O）α：0.50%Sn（α = 0或2，记为CMCH：0.50%Sn）微胶囊具有强烈的红色发光，归属于Mn 2+的4 T1 g → 6A 1g跃迁，光致发光（PL）量子产率（QY）为15.77%，是原始CsMnCl 3（H2O）2 MCs的4倍，由变温PL Boltzmann分析确定激活能为160 meV。Sn ~（2+）离子的掺入促进了无水CsMnCl_3的形成，并可能与Cl ~-发生键合。基于CMCH：0.50%Sn MCs的红色LED器件在300 mA的驱动电流下显示出超高的色纯度和良好的稳定性。这项工作成功地解决了无铅锰卤化物钙钛矿类似物（MHPAs）的典型低PL QY的问题，并提供了对全无机MHPAs的基本光学性质和相变机制的深入了解。
Herein, we develop a facile strategy to synthesize one-dimensional Sn-incorporated CsMnCl3microcrystals (MCs) via an acid dissolution method under high humidity. The prepared CsMnCl3(H2O)α:0.50%Sn (α = 0 or 2, noted as CMCH:0.50%Sn) MCs exhibit an intense red emission assigned to4T1g→6A1gtransition of Mn2+with a photoluminescence (PL) quantum yield (QY) of 15.77%, which is four times than that of pristine CsMnCl3(H2O)2MCs, with an activation energy of 160 meV determined from a temperature-dependent PL Boltzmann analysis. Sn2+ions incorporation can promote the formation of anhydrous CsMnCl3and are likely bonded to Cl ions. A red LED device based on CMCH:0.50%Sn MCs shows ultra-high color purity at a drive current of 300 mA and good stability. This work successfully addresses the issue of typically low PL QY of lead-free manganese halide perovskite-analogues (MHPAs) and provides insight into the fundamental optical properties and phase transformation mechanisms of all-inorganic MHPAs.