Photovoltaic effects in reconfigurable heterostructured black phosphorus transistors

Siqi Hu, Ruijuan Tian, Xiaoguang Luo, Rui Yin, Yingchun Cheng, Jianlin Zhao, Xiaomu Wang, Xuetao Gan

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We demonstrate a reconfigurable black phosphorus electrical field transistor, which is van der Waals heterostructured with few-layer graphene and hexagonal boron nitride flakes. Varied homojunctions could be realized by controlling both sourcedrain and top-gate voltages. With the spatially resolved scanning photocurrent microscopy technique, photovoltaic photocurrents originated from the band-bending regions are observed, confirming nine different configurations for each set of fixed voltages. In addition, as a phototransistor, high responsivity (∼800 mA/W) and fast response speed (∼230 μs) are obtained from the device. The reconfigurable van der Waals heterostructured transistors may offer a promising structure towards electrically tunable black phosphorus-based optoelectronic devices.

Original languageEnglish
Article number128502
JournalChinese Physics B
Volume27
Issue number12
DOIs
StatePublished - Dec 2018

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