Enhanced Photoresponse of SnSe-Nanocrystals-Decorated WS2 Monolayer Phototransistor

ACS Applied Materials & Interfaces
Zhiyan JiaZhongyuan Liu

Abstract

Single-layer WS2 has shown excellent photoresponse properties, but its promising applications in high-sensitivity photodetection suffer from the atomic-thickness-limited adsorption and band-gap-limited spectral selectivity. Here we have carried out investigations on WS2 monolayer based phototransistors with and without decoration of SnSe nanocrystals (NCs) for comparison. Compared to the solely WS2 monolayer, SnSe NCs decoration leads to not only huge enhancement of photoresponse in visible spectrum but also extension to near-infrared. Under excitation of visible light in a vacuum, the responsivity at zero gate bias can be enhanced by more than 45 times to ∼99 mA/W, and the response time is retained in millisecond level. Particularly, with extension of photoresponse to near-infrared (1064 nm), a responsivity of 6.6 mA/W can be still achieved. The excellent photoresponse from visible to near-infrared is considered to benefit from synergism of p-type SnSe NCs and n-type WS2 monolayer, or in other words, the formed p-n heterojunctions between p-type SnSe NCs and n-type WS2 monolayer.

References

Nov 23, 2000·Accounts of Chemical Research·F W Wise
Jul 20, 2005·Proceedings of the National Academy of Sciences of the United States of America·K S NovoselovA K Geim
Mar 4, 2008·Journal of the American Chemical Society·Anusorn KongkanandPrashant V Kamat
Nov 7, 2009·Nature Nanotechnology·Fengnian XiaPhaedon Avouris
Jun 29, 2010·Journal of the American Chemical Society·William J BaumgardnerTobias Hanrath
May 25, 2011·ACS Nano·Andrew G Rinzler, Evan P Donoghue
Sep 24, 2011·ACS Nano·Wanli MaA Paul Alivisatos
Oct 8, 2011·Science·Nathaniel M GaborPablo Jarillo-Herrero
Nov 1, 2011·Nano Letters·Goki EdaManish Chhowalla
Dec 15, 2011·ACS Nano·Zongyou YinHua Zhang
Apr 3, 2012·Advanced Materials·Yi-Hsien LeeTsung-Wu Lin
May 9, 2012·Nature Nanotechnology·Gerasimos KonstantatosFrank H L Koppens
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Dec 1, 2012·Nano Letters·Humberto R GutiérrezMauricio Terrones
Jan 15, 2013·Journal of the American Chemical Society·Lun LiQiangbin Wang
May 7, 2013·Nature Materials·Arend M van der ZandeJames C Hone
Jun 12, 2013·Nature Nanotechnology·Oriol Lopez-SanchezAndras Kis
Sep 4, 2013·Nanoscale·Weijie ZhaoGoki Eda
May 14, 2014·Nano Letters·Michele BuscemaAndres Castellanos-Gomez
Sep 10, 2014·ACS Applied Materials & Interfaces·Tamie A J Loh, Daniel H C Chua
Nov 18, 2014·Advanced Materials·Dominik KuferGerasimos Konstantatos
Sep 17, 2015·Advanced Materials·Xudong WangJunhao Chu
Oct 27, 2015·Advanced Materials·Kai XuJun He
Oct 28, 2015·ACS Nano·Yongji GongPulickel M Ajayan

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Citations

Apr 11, 2020·Advanced Science·Xiao-Lei ShiZhi-Gang Chen
Nov 17, 2017·Nanotechnology·Murali KrishnaKausik Majumdar
Dec 15, 2017·Physical Chemistry Chemical Physics : PCCP·Adha Sukma AjiHiroki Ago
Dec 31, 2020·Nanomaterials·Xiangyang LiShuangchen Ruan
Feb 27, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Ashish KumarO P Sinha
Sep 14, 2017·ACS Applied Materials & Interfaces·Shanghuai FengZhongyuan Liu
Apr 10, 2020·ACS Nano·Tsung-Han TsaiPo-Wen Chiu
Oct 21, 2017·ACS Applied Materials & Interfaces·Jing-Kai QinCheng-Yan Xu
Jan 18, 2019·ACS Applied Materials & Interfaces·Emma P MukhokosiKaruna K Nanda

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