| 基于大晶粒MA0.7FA0.3PbI3的薄膜光探测器 |
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| 引用本文： | 薛永祥,戴海涛,吕且妮,司马泰,张明娣.基于大晶粒MA0.7FA0.3PbI3的薄膜光探测器[J].光学仪器,2020,42(6):59-65. |
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| 作者姓名： | 薛永祥 戴海涛 吕且妮 司马泰 张明娣 |
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| 作者单位： | 天津大学 理学院，天津 300355;天津大学 精密仪器与光电子工程学院，天津 300372 |
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| 基金项目： | 国家自然科学基金（61975148、11804251） |
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| 摘 要： | 为了研究大晶粒高质量钙钛矿薄膜对光探测器的影响，制备了晶粒尺寸超过2 μm的MA0.7FA0.3PbI3薄膜，并基于该薄膜制备了光电导型的光探测器（MCP-PD）。基于该薄膜的光探测器在532 nm和3 V偏置电压下获得了高响应度（0.905 A/W）和探测度（3.18×1012 Jones）。在相似性能条件下，基于大晶粒尺寸薄膜制备的MCP-PD还表现出较快的响应速度。实验结果表明，大晶粒尺寸的薄膜降低了晶界对载流子传输的阻碍，提升了光探测器的响应度、探测度及响应速度。
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| 关 键 词： | 有机无机混合阳离子铅卤钙钛矿 光电探测器 高探测度 晶粒尺寸 |
| 收稿时间： | 2020/6/19 0:00:00 |
Thin film photoconductive detector based on large grain MA0.7FA0.3PbI3 |
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| Affiliation: | School of Science, Tianjin University, Tianjin 300355, China;School of Precision Instruments and Optoelectronic Engineering, Tianjin University, Tianjin 300372, China |
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| Abstract: | In order to study the effect of large grain high-quality perovskite thin films on photodetectors, MA0.7FA0.3PbI3 with a grain size of more than 2 microns was prepared, and a photoconductive photodetector (MCP-PD) was prepared based on the thin film. The photodetector based on the thin film had high responsivity (0.905 A/W) and detectivity (3.18×1012 Jones) at 532 nm and 3 V bias voltage. Under similar conditions, the MCP-PD prepared based on the large grain size film also showed a faster response speed. The experimental results showed that the thin film with large grain size reduced the obstacles of the grain boundary to carrier transport, and improved the responsivity, detection and response time. |
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| Keywords: | organic-inorganic mixed cation lead halide perovskite photodetector high detectivity grain size |
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