| Mn2+掺杂准二维钙钛矿(PEA)2PbyMn1-yBr4的制备及其电致发光性能 |
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| 引用本文： | 贾凡,许文宝,刘方彬,张海华,付红兵.Mn2+掺杂准二维钙钛矿(PEA)2PbyMn1-yBr4的制备及其电致发光性能[J].无机化学学报,2024,40(6):1114-1122. |
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| 作者姓名： | 贾凡 许文宝 刘方彬 张海华 付红兵 |
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| 作者单位： | 长春理工大学化学与环境工程学院, 长春 130000;天津大学分子+研究院, 化学化工协同创新中心(天津), 天津 300072;天津大学分子+研究院, 化学化工协同创新中心(天津), 天津 300072;首都师范大学化学系, 光功能材料与器件北京市重点实验室, 北京 100048 |
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| 基金项目： | 国家自然科学基金(No.22275135，52002269)、天津市自然科学基金(No.22JCQNJC01180)、科技部重点研发计划(No.2017YFA0204503)和中央高校基本科研基金资助项目资助。 |
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| 摘 要： | 制备了具有高荧光量子产率(photoluminescence quantum yield，PLQY)的Mn2+掺杂准二维钙钛矿(PEA)2PbyMn1-yBr4(PEA为苯乙胺，y为Pb2+占Mn2+和Pb2+总含量的物质的量分数)薄膜。宽带隙的(PEA)2PbBr4作为给体，掺杂杂质Mn2+作为受体，构筑了双发射的激发态传递系统。通过调控Mn2+掺杂的不同比例对(PEA)2PbyMn1-yBr4的发光性能和薄膜形貌的影响，发现当前驱体溶液中Mn2+与Pb2+的物质的量之比为1∶4时，薄膜有着最高的PLQY和最低的表面粗糙度。利用飞秒瞬态吸收(transient absorption，TA)光谱，追踪其动力学过程，发现主客体之间的激发态传递是通过电荷转移来实现的。为了研究材料的电致发光特性，我们将(PEA)2PbyMn1-yBr4作为活性层，加工得到了发光二极管(light emitting diodes，LEDs)。在室温下，器件发出明亮的橙色，其最高的发光强度为0.21 cd·m-2，外量子效率(external quantum efficiency，EQE)为0.002 5%。
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| 关 键 词： | 金属卤化物钙钛矿 掺杂 电荷转移 发光材料 电致发光 |
| 收稿时间： | 2023/12/17 0:00:00 |
| 修稿时间： | 2024/3/25 0:00:00 |
Synthesis and electroluminescence properties of Mn2+ doped quasi-two-dimensional perovskites (PEA)2PbyMn1-yBr4 |
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| JIA Fan,XU Wenbao,LIU Fangbin,ZHANG Haihu,FU Hongbing.Synthesis and electroluminescence properties of Mn2+ doped quasi-two-dimensional perovskites (PEA)2PbyMn1-yBr4[J].Chinese Journal of Inorganic Chemistry,2024,40(6):1114-1122. |
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| Authors: | JIA Fan XU Wenbao LIU Fangbin ZHANG Haihu FU Hongbing |
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| Institution: | School of Chemical and Environmental Engineering, Changchun University of Science and Technology, Changchun 130000, China;Institute of Molecular Plus, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin University, Tianjin 300072, China; Institute of Molecular Plus, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin University, Tianjin 300072, China;Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China |
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| Abstract: | Mn2+-doped quasi-two-dimensional perovskite (PEA)2PbyMn1-yBr4 (PEA is phenylethylamine, y is the fraction of Pb2+ in the total content of Mn2+ and Pb2+) thin films were prepared successfully with high photoluminescence quantum yield (PLQY). It constructed a dual-emissive excited state transfer system, while (PEA)2PbBr4 and impurity Mn2+ respectively act as the donor and acceptor. Mn2+ incorporation improved the luminescence properties and film morphologies. Using the femtosecond transient absorption (TA) measurement, we demonstrated the charge transfer processes between the host and the guest. To study the electroluminescence properties, (PEA)2PbyMn1-yBr4 film was employed as the active layer to fabricate LED (light emitting diodes, LEDs) devices. The (PEA)2PbyMn1-yBr4 LED device emitted a bright orange color, which demonstrated a maximum luminous intensity of 0.21 cd·m-2 with an external quantum efficiency (EQE) of 0.002 5%. |
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| Keywords: | metal halide perovskite doping charge transfer luminescence material electroluminescence |
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