• 文献标题:   Hybrid graphene/GaN ultraviolet photo-transistors with high responsivity and speed
  • 文献类型:   Article
  • 作  者:   TIAN HJ, LIU QL, HU AQ, HE XY, HU ZH, GUO X
  • 作者关键词:  
  • 出版物名称:   OPTICS EXPRESS
  • ISSN:   1094-4087
  • 通讯作者地址:   Beijing Univ Posts Telecommun
  • 被引频次:   7
  • DOI:   10.1364/OE.26.005408
  • 出版年:   2018

▎ 摘  要

In this work, we explore the possibility of using hybrid graphene/GaN phototransistors to get high responsivity, high speed, and large photosensitive area. The responsivity of our hybrid graphene/GaN phototransistors with a relatively large 15.2 mm(2) active area reaches 361 mA/W at 10 V and the response time is similar to 5 ms, much better performance than traditional GaN photodetectors. This is because graphene acts as the carrier transport channel with a high mobility and greatly increases the charge collection efficiency. Our results should shed more light on the role of graphene in hybrid phototransistors and open a feasible pathway to develop large area ultraviolet photodetectors with high responsivity and high speed. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement