• 文献标题:   High-Performance, Self-Driven Photodetector Based on Graphene Sandwiched GaSe/WS2 Heterojunction
  • 文献类型:   Article
  • 作  者:   LV QS, YAN FG, WEI X, WANG KY
  • 作者关键词:   gase, selfdriven photodetector, transition metal dichalcogenide, uvvisible photodetector, vertical vdws heterostructure
  • 出版物名称:   ADVANCED OPTICAL MATERIALS
  • ISSN:   2195-1071
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   41
  • DOI:   10.1002/adom.201700490
  • 出版年:   2018

▎ 摘  要

Restacking the exfoliated 2D layered materials into complex heterostructures with new functionality has opened a new platform for materials engineering and device application. In this work, graphene sandwiched p-GaSe/n-WS2 vertical heterostructures are fabricated for photodetection. The devices show excellent performance on photodetection from ultraviolet to visible wavelength range, including high photoresponsivity (approximate to 149 A W-1 at 410 nm), short response time of 37 mu s, and self-powered photodetection. The scanning photocurrent microscopy is also employed to investigate the photocurrent generation in the heterojunction and a significant enhancement of the photoresponse is found in the overlapping region. The results suggest that the graphene sandwiched vertical heterojunctions are promising in future novel optoelectronic devices applications.