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Silver-ion-passivated black phosphorus photodetectors to improve the response time.

Authors :
Zuo, Huilin
Bai, Jing
Wang, Chenglin
Ni, Junhao
Ding, Yang
Pan, Bingyu
Cai, Zhengyang
Xiao, Shaoqing
Gu, Xiaofeng
Zhang, Xiumei
Nan, Haiyan
Source :
New Journal of Chemistry; 4/21/2023, Vol. 47 Issue 15, p7432-7437, 6p
Publication Year :
2023

Abstract

We present a remarkable improvement in the photoresponse time of few-layer black phosphorus (BP) following treatment with silver nitrate solution, with the rise time being reduced from 1.71 s to 50 ms and the fall time being reduced from 3.25 s to 80 ms. X-ray photoelectron spectroscopy (XPS) was utilized to analyze the surface of the treated BP flakes, and the role of Ag<superscript>+</superscript> in diminishing the surface activity of BP devices was evaluated. Moreover, the adsorption of Ag<superscript>+</superscript> was observed to effectively hinder the oxidation of the BP surface, resulting in a decrease of the hysteresis from 85.6 V to 29 V. By analyzing the correlation coefficients of photocurrent and laser power, we suggest that the improved performance of the photodetector is caused by the presence of BP(Ag<superscript>+</superscript>) on the surface, which significantly decreases the concentration of defects in BP and thus the concentration of trap states. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
11440546
Volume :
47
Issue :
15
Database :
Complementary Index
Journal :
New Journal of Chemistry
Publication Type :
Academic Journal
Accession number :
163015187
Full Text :
https://doi.org/10.1039/d3nj00470h