High‐Performance, Self‐Driven Photodetector Based on Graphene Sandwiched GaSe/WS2 Heterojunction,Advanced Optical Materials

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High‐Performance, Self‐Driven Photodetector Based on Graphene Sandwiched GaSe/WS2 Heterojunction
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2017-12-28 , DOI: 10.1002/adom.201700490
Quanshan Lv _{1,

2} , Faguang Yan _{1,

2} , Xia Wei _{1,

2} , Kaiyou Wang _{1,

2}

Affiliation

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 (≈149 A W⁻¹ at 410 nm), short response time of 37 µs, 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.

中文翻译：

基于石墨烯夹层GaSe / WS2异质结的高性能自驱动光电探测器

通过新功能将剥离的2D分层材料重新堆叠为复杂的异质结构，为材料工程和设备应用打开了一个新平台。在这项工作中，制造了石墨烯夹心的p-GaSe / n-WS ₂垂直异质结构用于光检测。该器件在从紫外到可见光波长范围内的光检测方面表现出出色的性能，包括高光响应性（≈149AW ^-1在410 nm波长下），37 µs的短响应时间和自供电光电检测。扫描光电流显微镜还用于研究异质结中的光电流产生，并且在重叠区域中发现光响应的显着增强。结果表明，石墨烯夹心的垂直异质结在未来的新型光电器件应用中很有前途。

更新日期：2017-12-28

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