张希/刁东风等在JCR1区Carbon发表论文阅读次数 [31] 发布时间 :2020-11-02 16:53:15
我所又一篇论文：High-response heterojunction phototransistor based on vertically grown graphene nanosheets film，在JCR1区期刊Carbon上发表。
High-response heterojunction phototransistor based on vertically grown graphene nanosheets film
Carbon 172 (2021) 720-728 （PDF-File）
Xi Zhang , Lulu Tian , Dongfeng Diao *
Carbon-phototransistor with a structure of vertically grew graphene nanosheets embedded carbon (GNEC) film is fabricated through an electron-assisted sputtering-deposition method. This heterojunction phototransistor of GNEC/n-Si exhibits broad detection range (from 450 nm to 1200 nm), high photoresponsivity (1.298·104 A/W), and rapid response to on-off optical signals (4.91 ms). Driven by the source-drain voltage applied to the GNEC film, electrons recycle in the circuit before recombination, which enhance drastically the usage efficiency of photo-induced carriers. Besides, GNEC film contains a large amount of graphene edges, which may serve as electron pump in the photovoltaic process based on the e-h separation in the p-n junction. The GNEC/n-Si phototransistor improves the responsivity of ~103 order compared with that of photodiode mode.
