Self-assembled KCu7S4 nanowire monolayers for self-powered near-infrared photodetectors

被引：15

作者：

Wang, You-Yi ^{[1
]}

Wu, Ya-Dong ^{[2
]}

Peng, Wei ^{[1
]}

Song, Yong-Hong ^{[2
]}

Wang, Bao ^{[3
]}

Wu, Chun-Yan ^{[1
]}

Lu, Yang ^{[2
]}

机构：

[1] Hefei Univ Technol, Sch Elect Sci & Appl Phys, Hefei 230009, Anhui, Peoples R China

[2] Hefei Univ Technol, Biomed & Environm Interdisciplinary Res Ctr, Sch Chem & Chem Engn, Hefei 230009, Anhui, Peoples R China

[3] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China

来源：

NANOSCALE | 2018年 / 10卷 / 39期

关键词：

CHEMICAL-VAPOR-DEPOSITION; SCHOTTKY JUNCTION; HIGH-SPEED; TRANSPARENT ELECTRODES; LIGHT PHOTODETECTOR; LOW-NOISE; HETEROJUNCTION; PERFORMANCE; ARRAYS; DEVICES;

D O I：

10.1039/c8nr01553h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Near infrared light (NIR) photodetectors based on one-dimensional semiconductor nanowires have generated considerable interest due to their practical application in versatile fields. We present a facile yet efficient approach to rationally integrating KCu7S4 semiconductor nanowires by the Langmuir-Blodgett (LB) technique. A self-powered near infrared (NIR) light photodetector is fabricated by transferring a close-packed KCu7S4 nanowire monolayer to the surface of a silicon wafer. The as-fabricated Si/KCu7S4 heterojunction with a close-packed and well-aligned nanowire array exhibits splendid photovoltaic performance when illuminated by NIR light, allowing the detection of NIR light without an exterior power supply. The photodetector exhibits a high sensitivity to NIR light (980 nm, 295.3 mu W cm(-2)) with responsivity (R) 15 mA W-1 and detectivity (D*) 2.15 x 10(12) cm Hz(1/2) W-1. Significantly, the device shows the capability to work under high pulsed light irradiation up to 50 kHz with a high-speed response (response time iota(r) 7.4 mu s and recovery time iota(f) 8.6 mu s). This facilitates the fabrication of low-cost and high-speed photodetectors and integrated optoelectronic sensor circuitry.

引用

页码：18502 / 18509

页数：9

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