摘要
The layered two-dimensional material tungsten diselenide(WSe_(2))has triggered tremendous interests in the field of optoelectronic devices due to its exceptional carrier transport property.Nevertheless,the limited absorption of WSe_(2) in the near infrared(NIR)band poses a challenge for the application of WSe_(2) photodetectors in night vision,telecommunication,etc.Herein,the enhanced performance of the WSe_(2) photodetector is demonstrated through the incorporation of titanium nitride nanoparticles(TiN NPs),complemented by an atomically-thick Al_(2)O_(3) layer that aids in suppressing the dark current.It is demonstrated that TiN NPs can dramatically enhance the absorption of light in the proposed WSe_(2) photodetector in the NIR regime.This enhancement boosts photocurrent responses through the generation of plasmonic hot electrons,leading to external quantum efficiency(EQE)enhancement factors of 379.66%at 850 nm and 178.47%at 1550 nm.This work presents,for the first time,to our knowledge,that the WSe_(2) photodetector is capable of detecting broadband light spanning from ultraviolet to the telecommunication range,all achieved without the reliance on additional semiconductor materials.This achievement opens avenues for the advancement of cost-effective NIR photodetectors.
基金
National Natural Science Foundation of China(62205235,U21A20496,62204157,62174117)
Introduction of Talents Special Project of Lvliang City(Rc2020206,Rc2020207)
Research Project Supported by Shanxi Scholarship Council of China(2021-033)
Research Program Supported by Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2021SX-FR008,2022SX-TD020)
Central Government Guides Local Funds for Scientific and Technological Development(YDZJSX2021A012,YDZJSX20231A010)
Natural Science Foundation of Shanxi Province(20210302123154)
Key Research and Development Program of Shanxi Province(202102150101007)。
作者简介
GUOHUI LI,e-mail:liguohui@tyut.edu.cn YANXIA CUI,e-mail:yanxiacui@tyut.edu.cn。
