DataVXACS Applied Materials & InterfacesPaper
journal article·2021-10-27

Ambipolar Photoresponsivity in an Ultrasensitive Photodetector Based on a WSe2/InSe Heterostructure by a Photogating Effect

Ting Lei, Huayao Tu, Weiming Lv, Haixin Ma, Jiachen Wang, Rui Hu, Qilitai Wang, Like Zhang, Bin Fang, Zhongyuan Liu, Wenhua Shi, Zhongming Zeng

ACS Applied Materials & Interfaces· Volume 13· Issue 42
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Source abstract

Abstract

Ambipolar photoresponsivity mainly originates from intrinsic or interfacial defects. However, these defects are difficult to control and will prolong the response speed of the photodetector. Here, we demonstrate tunable ambipolar photoresponsivity in a photodetector built from vertical p-WSe2/n-InSe heterostructures with photogating effect, exhibiting ultrahigh photoresponsivity from -1.76 × 104 to 5.48 × 104 A/W. Moreover, the photodetector possesses broadband photodetection (365-965 nm), an ultrahigh specific detectivity (D*) of 5.8 × 1013 Jones, an external quantum efficiency of 1.86 × 107%, and a rapid response time of 20.8 ms. The WSe2/InSe vertical architecture has promising potential in developing high-performance nano-optoelectronics.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

Electronic materials

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanofabrication Facility, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, Jiangsu 215123, China

School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, Anhui 230026, China

Nanchang Nano-Devices and Technologies Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Nanchang, Jiangxi 330200, China

State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China

Funding

Ministry of Science and Technology of the People's Republic of China · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Jiangxi Province

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