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Phototransistors: Hybrid Graphene–Perovskite Phototransistors with Ultrahigh Responsivity and Gain (Advanced Optical Materials 10/2015)
Author(s) -
Wang Yusheng,
Zhang Yupeng,
Lu Yao,
Xu Weidong,
Mu Haoran,
Chen Caiyun,
Qiao Hong,
Song Jingchao,
Li Shaojuan,
Sun Baoquan,
Cheng YiBing,
Bao Qiaoliang
Publication year - 2015
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201570058
Subject(s) - responsivity , photodetection , photodetector , materials science , perovskite (structure) , photoconductivity , optoelectronics , graphene , specific detectivity , optics , nanotechnology , physics , chemical engineering , engineering
A hybrid photodetector consisting of monolayer graphene covered with dispersive organolead halide perovskite islands is demonstrated by B. Sun, Y.‐B. Cheng, Q. Bao, and co‐workers. On page 1389, the photodetector is shown to have a photoconductive gain of ≈10 9 electrons per photon and a responsivity of ≈6.0 × 10 5 A W −1 . Evidence is provided for charge transfer and photogating. Unlike previous reports on perovskite bulk thin films, these islands have a low recombination rate. The device also shows photodetection across a broad range from 250 to 700 nm.