光电探测器
光电子学
材料科学
多路复用
纳米线
光通信
光学
极化(电化学)
纳米技术
物理
电信
计算机科学
物理化学
化学
作者
Huaxin Yi,Churong Ma,Wan Wang,Huanrong Liang,Rui Cui,Weiwei Cao,Hailin Yang,Yuhang Ma,Wenjing Huang,Zhaoqiang Zheng,Yichao Zou,Zexiang Deng,Jiandong Yao,Guowei Yang
出处
期刊:Materials horizons
[Royal Society of Chemistry]
日期:2023-01-01
卷期号:10 (9): 3369-3381
被引量:39
摘要
In this study, cost-efficient atmospheric pressure chemical vapor deposition has been successfully developed to produce well-aligned high-quality monocrystalline Bi2S3 nanowires. By virtue of surface strain-induced energy band reconstruction, the Bi2S3 photodetectors demonstrate a broadband photoresponse across 370.6 to 1310 nm. Upon a gate voltage of 30 V, the responsivity, external quantum efficiency, and detectivity reach 23 760 A W-1, 5.55 × 106%, and 3.68 × 1013 Jones, respectively. The outstanding photosensitivity is ascribed to the high-efficiency spacial separation of photocarriers, enabled by synergy of the axial built-in electric field and type-II band alignment, as well as the pronounced photogating effect. Moreover, a polarization-discriminating photoresponse has been unveiled. For the first time, the correlation between quantum confinement and dichroic ratio is systematically explored. The optoelectronic dichroism is established to be negatively correlated with the cross dimension (i.e., width and height) of the channel. Specifically, upon 405 nm illumination, the optimized dichroic ratio reaches 2.4, the highest value among the reported Bi2S3 photodetectors. In the end, proof-of-concept multiplexing optical communications and broadband lensless polarimetric imaging have been implemented by exploiting the Bi2S3 nanowire photodetectors as light-sensing functional units. This study develops a quantum tailoring strategy for tailoring the polarization properties of (quasi-)1D material photodetectors whilst depicting new horizons for the next-generation opto-electronics industry.
科研通智能强力驱动
Strongly Powered by AbleSci AI