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Efficient Exciton to Dopant Energy Transfer in Mn2+-Doped (C4H9NH3)2PbBr4 Two-Dimensional (2D) Layered Perovskites
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acs.chemmater.7b02429 Anupam Biswas 1 , Rangarajan Bakthavatsalam 1 , Janardan Kundu 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acs.chemmater.7b02429 Anupam Biswas 1 , Rangarajan Bakthavatsalam 1 , Janardan Kundu 1
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Three-dimensional ABX3 perovskite material has attracted immense interest and applications in optoelectronic devices, because of their enabling properties. Recently, Mn2+ doping directly into APbCl3-type three-dimensional (3D) nanocrystals, manifesting host-to-dopant energy transfer, have been reported for LED display applications. Strongly bound excitons in the doped system can enhance the dopant-carrier exchange interactions, leading to efficient energy transfer. Here, we report the simple and scalable synthesis of Mn2+-doped (C4H9NH3)2PbBr4 two-dimensional (2D) layered perovskites. The Mn2+-doped 2D perovskite shows enhanced energy transfer efficiency from the strongly bound excitons of the host material to the d electrons of Mn2+ ions, resulting in intense orange-yellow emission, which is due to spin-forbidden internal transition (4T1 → 6A1) with the highest quantum yield (Mn2+) of 37%. Because of this high quantum yield, stability in ambient atmosphere, and simplicity and scalability of the synthetic procedure, Mn2+-doped 2D perovskites could be beneficial as color-converting phosphor material and as energy down-shift coating for perovskite solar cells. The newly developed Mn2+-doped 2D perovskites can be a suitable material to tune dopant-exciton exchange interactions to further explore their magneto-optoelectronic properties.
中文翻译：
Mn 2+掺杂（C 4 H 9 NH 3）2 PbBr 4二维（2D）层状钙钛矿中的有效激子到掺杂剂的能量转移
三维ABX 3钙钛矿材料因其有利的性能而在光电器件中引起了极大的兴趣和应用。最近，已经报道了将Mn 2+直接掺杂到APbCl 3型三维（3D）纳米晶体中，表现出主体到掺杂剂之间的能量转移，用于LED显示应用。掺杂系统中的强束缚激子可以增强掺杂剂-载流子交换相互作用，从而导致有效的能量转移。在这里，我们报告了Mn 2+掺杂的（C 4 H 9 NH 3）2 PbBr 4的简单且可扩展的合成二维（2D）层状钙钛矿。掺杂Mn 2+的2D钙钛矿显示出从主体材料的强键合激子到Mn 2+离子的d电子增强的能量转移效率，导致强烈的橙黄色发射，这是由于自旋禁止的内部跃迁（4 T 1 → 6 A 1）的最高量子产率（Mn 2+）为37％。由于这种高的量子产率，在环境大气中的稳定性以及合成过程的简单性和可扩展性，Mn 2+掺杂的2D钙钛矿可能有益于颜色转换磷光体材料和钙钛矿太阳能电池的能量下移涂层。新开发的Mn 2+掺杂的2D钙钛矿可以作为调整掺杂物-激子交换相互作用以进一步探索其磁光特性的合适材料。
更新日期：2017-09-11
中文翻译：
Mn 2+掺杂（C 4 H 9 NH 3）2 PbBr 4二维（2D）层状钙钛矿中的有效激子到掺杂剂的能量转移
三维ABX 3钙钛矿材料因其有利的性能而在光电器件中引起了极大的兴趣和应用。最近，已经报道了将Mn 2+直接掺杂到APbCl 3型三维（3D）纳米晶体中，表现出主体到掺杂剂之间的能量转移，用于LED显示应用。掺杂系统中的强束缚激子可以增强掺杂剂-载流子交换相互作用，从而导致有效的能量转移。在这里，我们报告了Mn 2+掺杂的（C 4 H 9 NH 3）2 PbBr 4的简单且可扩展的合成二维（2D）层状钙钛矿。掺杂Mn 2+的2D钙钛矿显示出从主体材料的强键合激子到Mn 2+离子的d电子增强的能量转移效率，导致强烈的橙黄色发射，这是由于自旋禁止的内部跃迁（4 T 1 → 6 A 1）的最高量子产率（Mn 2+）为37％。由于这种高的量子产率，在环境大气中的稳定性以及合成过程的简单性和可扩展性，Mn 2+掺杂的2D钙钛矿可能有益于颜色转换磷光体材料和钙钛矿太阳能电池的能量下移涂层。新开发的Mn 2+掺杂的2D钙钛矿可以作为调整掺杂物-激子交换相互作用以进一步探索其磁光特性的合适材料。
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