High performance diamond-based solar-blind photodetectors enabled by Schottky barrier modulation

被引：42

作者：

Lin, Chao -Nan ^{[1
]}

Zhang, Zhen-Feng ^{[1
]}

Lu, Ying-Jie ^{[1
]}

Yang, Xun ^{[1
]}

Zhang, Yuan ^{[1
]}

Li, Xing ^{[1
]}

Zang, Jin-Hao ^{[1
]}

Pang, Xin-Chang ^{[2
]}

Dong, Lin ^{[1
]}

Shan, Chong-Xin ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Phys & Microelect, Henan Key Lab Diamond Optoelect Mat & Devices, Key Lab Mat Phys,Minist Educ, Zhengzhou 450052, Peoples R China

[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450052, Peoples R China

来源：

CARBON | 2022年 / 200卷

基金：

中国国家自然科学基金;

关键词：

Diamond; Solar -blind photodetectors; Schottky barriers modulation; High responsivity; ULTRAVIOLET PHOTODETECTOR; ULTRAHIGH-PERFORMANCE; SURFACE CONDUCTIVITY; TRANSPORT; TEMPERATURE;

D O I：

10.1016/j.carbon.2022.09.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diamond, which possesses an ultra-wide bandgap, high thermal conductivity, and super thermal and chemical stability, is a promising material for deep-ultraviolet optoelectronics. However, it is still difficult for diamond photodetectors to meet the requirements of practical applications due to their relatively low responsivity. Here, we demonstrate a high-performance diamond photodetector realized via Schottky barrier modulation. Defect states and hydrogen terminals are introduced onto the surface of the diamond by hydrogen plasma treatment. Under illumination, photon-generated electrons are trapped by the defect states at the surface of the diamond, which lowers dramatically the Schottky barrier height, leading to high photocurrent of the photodetector. As a result, our device exhibits a responsivity of 524.9 A/W, a gain of 2958, and a detectivity of 3.42 x 10(15) cm Hz1/2 W-1, all of which are among the highest values ever reported for diamond-based photodetectors. Thus, our results suggest a novel strategy for design and fabrication of high-performance diamond photodetectors.

引用

页码：510 / 516

页数：7

共 67 条

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