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Low‐Temperature Heteroepitaxy of 2D PbI 2 /Graphene for Large‐Area Flexible Photodetectors
Author(s) -
Zhang Jincan,
Huang Yucheng,
Tan Zhenjun,
Li Tianran,
Zhang Yichi,
Jia Kaicheng,
Lin Li,
Sun Luzhao,
Chen Xiwen,
Li Zhenzhu,
Tan Congwei,
Zhang Jinxia,
Zheng Liming,
Wu Yue,
Deng Bing,
Chen Zhaolong,
Liu Zhongfan,
Peng Hailin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201803194
Subject(s) - graphene , materials science , responsivity , photodetector , heterojunction , optoelectronics , polyethylene terephthalate , chemical vapor deposition , nanotechnology , substrate (aquarium) , graphene nanoribbons , composite material , oceanography , geology
Heterostructures based on graphene and other 2D atomic crystals exhibit fascinating properties and intriguing potential in flexible optoelectronics, where graphene films function as transparent electrodes and other building blocks are used as photoactive materials. However, large‐scale production of such heterostructures with superior performance is still in early stages. Herein, for the first time, the preparation of a submeter‐sized, vertically stacked heterojunction of lead iodide (PbI 2 )/graphene on a flexible polyethylene terephthalate (PET) film by vapor deposition of PbI 2 on graphene/PET substrate at a temperature lower than 200 °C is demonstrated. This film is subsequently used to fabricate bendable graphene/PbI 2 /graphene sandwiched photodetectors, which exhibit high responsivity (45 A W −1 cm −2 ), fast response (35 µs rise, 20 µs decay), and high‐resolution imaging capability (1 µm). This study may pave a facile pathway for scalable production of high‐performance flexible devices.