Hybrid graphene/n-GaAs photodiodes with high specific detectivity and high speed - 文章详情页

作者：

Tian, Hui-Jun (Tian, Hui-Jun.) | Liu, Qiao-Li (Liu, Qiao-Li.) | Yue, Heng (Yue, Heng.) | Hu, An-Qi (Hu, An-Qi.) | Guo, Xia (Guo, Xia.) (学者：郭霞)

收录：

EI CSCD

摘要：

Hybrid　graphene/semiconductor　phototransistors　have　attracted　great　attention　because　of　their　ultrahigh　responsivity.　However,　the　specific　detectivity　(D*)　for　such　hybrid　phototransistors　obtained　from　source-drain　electrodes　is　assumed　to　be　1/f　noise.　In　this　paper,　D*　of　~1.82×1011　Jones　was　achieved　from　source-gate　electrodes.　Compared　with　the　same　device　which　was　measured　from　source-drain　electrodes,　D*　was　improved　by　~500　times.　This　could　be　attributed　to　the　carrier　trapping　and　detrapping　processes　having　been　screened　by　the　Schottky　barrier　at　the　interface.　The　rise　and　decay　times　were　4　ms　and　37　ms,　respectively.　The　temporal　response　speed　also　correspondingly　improved　by　~2　orders　of　magnitude.　This　work　provides　an　alternative　route　toward　light　photodetectors　with　high　specific　detectivity　and　speed.　Copyright　©2021　Chinese　Optics.　All　rights　reserved.

关键词：

Electrodes Graphene Phototransistors Refractory metal compounds Schottky barrier diodes

作者机构：

[ 1 ] [Tian, Hui-Jun]Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Tian, Hui-Jun]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China
[ 3 ] [Liu, Qiao-Li]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China
[ 4 ] [Yue, Heng]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China
[ 5 ] [Hu, An-Qi]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China
[ 6 ] [Guo, Xia]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing; 100876, China

通讯作者信息：

[hu, an-qi]school of electronic engineering, beijing university of posts and telecommunications, beijing; 100876, china

电子邮件地址：

anqihu@bupt.edu.cnemailguox@bupt.edu.cn) Guo, Xia(guox@bupt.edu.cn

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