光电探测器
光电流
卤化物
钙钛矿(结构)
Crystal(编程语言)
单晶
量子效率
分析化学(期刊)
离子
吸收(声学)
光强度
带隙
材料科学
化学
偏压
光电子学
光学
无机化学
结晶学
电压
物理
量子力学
复合材料
有机化学
程序设计语言
色谱法
计算机科学
作者
Yan Chen,Siwen Tao,Yaqi Liu,Xuewei Fu,Mengyi Pei,Xuhong Hou,Hua-wei Zhou,Jie Yin,Xianxi Zhang
出处
期刊:Journal of Nanoelectronics and Optoelectronics
[American Scientific Publishers]
日期:2021-05-01
卷期号:16 (5): 707-714
被引量:1
标识
DOI:10.1166/jno.2021.2986
摘要
Inorganic-organic hybrid perovskite (ABX 3 , A = organic cation, B = metal ion, X = halogen anion) combines the advantages of inorganic and organic materials. However, the properties and performance of mixed-halide CH 3 NH 3 PbBr 2.5 Cl 0.5 (MAPbBr 2.5 Cl 0.5 ) are still poorly understood. In this study, we synthetized MAPbBr 2.5 Cl 0.5 single crystal and studied its structure, optical, thermal stability properties and optoelectronics applications for photodetector device. Compared with those of MAPbCl 3 , the interplanar distance of (100) crystal plane for MAPbBr 2.5 Cl 0.5 becomes larger and the absorption spectrum of MAPbBr 2.5 Cl 0.5 is extended to the visible region. The band gap of the MAPbBr 2.5 Cl 0.5 single crystal is 2.28 eV. We find the device based on MAPbBr 2.5 Cl 0.5 has high selectivity from 369 to 564 nm. The maximum ▴J ( J on – J off ) under 3.0 V bias voltage is about 1.2 µAcmr -2 at 454 nm visible light with 1 W mr -2 light intensity (1/1000 of the standard sunlight intensity), which proves the device has a high sensitivity. The linear relationship is established between the value of ▴J and light intensity and bias voltage. The fast current intensity transients (Fit) shows that the disappearance period of photocurrent density is 0.3 ms, which indicates the device is rapidly responsive photodetector. The highest value (1.7%) of external quantum efficiency (EQE) and the highest value of detectivities (D) both appear at 480 nm visible light at 4.0 V bias voltage when the irradiation power is 30 W m -2 . Therefore, this simple and low-cost photoresponsive device is promising for industrial production of photodetector and photocatalysts device in the future.
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