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CuInSe2 Quantum Dots Hybrid Hole Transfer Layer for Halide Perovskite Photodetectors
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-09-25 00:00:00 , DOI: 10.1021/acsami.8b13777
Ruiqi Guo 1 , Fei Huang 1 , Kaibo Zheng 2, 3 , Tönu Pullerits 2 , Jianjun Tian 1
Affiliation  

A novel hybrid hole transport layer (HTL) of CuInSe2 quantum dots (QDs)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) was developed to enhance the performance of halide metal perovskite (MAPbI3)-based photodetectors. The introduction of CuInSe2 QDs not only improved the wettability of the PEDOT:PSS HTL for the growth of perovskite crystals but also facilitated the transportation of holes from the perovskite to the HTL. As a result, both responsivity and detectivity of the device were increased dramatically by CuInSe2 QDs hybrid HTL, showing excellent photoresponsivity of 240 mA/W, larger ratio of photocurrent density to dark current density of 4.1 × 106, fast on–off switching properties of <0.02 s, and remarkable detectivity values of 1.02 × 1013 Jones at 580 nm and above 5.01 × 1012 Jones over the visible light region without an external bias voltage. In addition, the photodetectors also showed excellent thermal stability in the range of 10–110 °C. Therefore, a unique design idea of a hole transport material would be an anticipated direction for efficient halide metal perovskite-based devices.

中文翻译:

CuInSe 2量子点混合空穴传输层,用于卤化钙钛矿光电探测器

开发了一种新型的CuInSe 2量子点(QDs)/聚(3,4-乙撑二氧噻吩):聚(苯乙烯磺酸盐)(PEDOT:PSS)杂化空穴传输层(HTL),以增强卤化物钙钛矿(MAPbI 3)的性能。的光电探测器。CuInSe 2 QD的引入不仅改善了PEDOT:PSS HTL对于钙钛矿晶体生长的润湿性,而且还促进了空穴从钙钛矿到HTL的传输。结果,CuInSe 2 QDs混合HTL大大提高了器件的响应度和检测率,显示出240 mA / W的出色光响应性,光电流密度与暗电流密度之比更大,为4.1×10 6,<0.02 s的快速开关特性,在无外部偏置电压的情况下,在可见光区域内在580 nm处具有显着的检测值1.02×10 13 Jones,在5.01×10 12 Jones以上。此外,光电探测器还在10–110°C的温度范围内显示出出色的热稳定性。因此,空穴传输材料的独特设计思想将成为有效的基于卤化物金属钙钛矿的器件的预期方向。
更新日期:2018-09-25
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