Broadband hybrid organic/CuInSe2 quantum dot photodetectors

被引：52
作者：
Guo R. [1 ]
Shen T. [1 ]
Tian J. [1 ]
机构：
[1] Institute for Advanced Materials and Technology, University of Science and Technology, Beijing
来源：
Tian, Jianjun (tianjianjun@mater.ustb.edu.cn) | 2018年 / Royal Society of Chemistry卷 / 06期
基金：
中国国家自然科学基金;
关键词：
This work was supported by the National Science Foundation of China (51774034; 51772026; and; 51611130063); Beijing Natural Science Foundation (2182039); Fundamental Research Funds for the Central Universities (FRF-BD-16-012A) and 111 Project (No. B17003);
D O I：
10.1039/c8tc00288f
中图分类号：
学科分类号：
摘要：
"Green" narrow band-gap CuInSe2 quantum dots (QDs) were first introduced in photodetectors. Thus, a broadband hybrid photodetector was obtained by combining the ultraviolet detection of spiro-OMeTAD and the near-infrared detection of CuInSe2 QDs. In order to improve the detection of the device, the oil-soluble CuInSe2 QDs were transformed into water-soluble MPA-capped QDs through ligand exchange, which drastically shortened the length of the surface ligand. The specific detectivity (D∗) of the photodetector reached 1.6 × 1012 Jones at 330 nm and 7.5 × 1010 Jones at a 1000 nm wavelength. The unencapsulated device also displayed a fast response time (<0.02 s) and excellent thermal stability (20-100 °C) in ambient air. This work could open a window of toxic-free QD based photodetectors to achieve a broadband response. © 2018 The Royal Society of Chemistry.
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页码：2573 / 2579
页数：6
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