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Monitoring the Doping and Diffusion Characteristics of Mn Dopants in Cesium Lead Halide Perovskites
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-05-04 00:00:00 , DOI: 10.1021/acs.jpcc.8b02580 Tugrul Guner 1 , Baris Akbali 2 , Mehmet Ozcan 3 , Gokhan Topcu 1 , Mustafa M. Demir 1 , Hasan Sahin 3, 4
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-05-04 00:00:00 , DOI: 10.1021/acs.jpcc.8b02580 Tugrul Guner 1 , Baris Akbali 2 , Mehmet Ozcan 3 , Gokhan Topcu 1 , Mustafa M. Demir 1 , Hasan Sahin 3, 4
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Cesium lead perovskites, in the form of CsPbX3 or Cs4PbX6, have been widely used for various optoelectronic applications due to their exceptionally good optical properties. In this study, the effect of Mn doping on the structural and optical properties of cesium lead halide perovskite crystals are investigated from both experimental and theoretical points of view. It is found that adding MnCl2 during the synthesis not only leads to a Mn-driven structural phase transition from Cs4PbBr6 to CsPbCl3 but also triggers the Br– to Cl– halide exchange. On the other hand, it is observed that, under UV illumination, the color of Mn-doped crystals changes from orange to blue in approximately 195 h. While the intensity of Mn-originated photoluminescence emission exponentially decays in time, the intensity of CsPbCl3-originated emission remains unchanged. In addition, diffusive motion of Mn ions results in both a growing population of MnO2 at the surface and transition of the host into a cesium-rich Cs4PbCl6 phase.
中文翻译：
监测铯铅卤化物钙钛矿中锰掺杂的掺杂和扩散特性
以CsPbX 3或Cs 4 PbX 6形式存在的钙铅钙钛矿因其出色的光学性能而被广泛用于各种光电应用中。在这项研究中，从实验和理论的角度研究了锰掺杂对卤化铯铅钙钛矿晶体的结构和光学性质的影响。据发现，添加的MnCl 2在合成过程中不仅通向锰驱动结构相变选自C 4 PbBr 6至CsPbCl 3而且触发溴-对氯-卤化物交换。另一方面，观察到在紫外线照射下，Mn掺杂晶体的颜色在大约195小时内从橙色变为蓝色。尽管源自Mn的光致发光发射强度随时间呈指数衰减，但源自CsPbCl 3的发射强度保持不变。此外，Mn离子的扩散运动导致表面上的MnO 2种群增加以及基质向富铯的Cs 4 PbCl 6相转变。
更新日期：2018-05-04
中文翻译：
监测铯铅卤化物钙钛矿中锰掺杂的掺杂和扩散特性
以CsPbX 3或Cs 4 PbX 6形式存在的钙铅钙钛矿因其出色的光学性能而被广泛用于各种光电应用中。在这项研究中，从实验和理论的角度研究了锰掺杂对卤化铯铅钙钛矿晶体的结构和光学性质的影响。据发现，添加的MnCl 2在合成过程中不仅通向锰驱动结构相变选自C 4 PbBr 6至CsPbCl 3而且触发溴-对氯-卤化物交换。另一方面，观察到在紫外线照射下，Mn掺杂晶体的颜色在大约195小时内从橙色变为蓝色。尽管源自Mn的光致发光发射强度随时间呈指数衰减，但源自CsPbCl 3的发射强度保持不变。此外，Mn离子的扩散运动导致表面上的MnO 2种群增加以及基质向富铯的Cs 4 PbCl 6相转变。
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