Synthesis of two-dimensional β-Ga2O3 nanosheets for high-performance solar blind photodetectors

Wei Feng; Xiaona Wang; Jia Zhang; Lifeng Wang; Wei Zheng; PingAn Hu; Wenwu Cao; Bin Yang

doi:10.1039/C3TC31899K

Synthesis of two-dimensional β-Ga₂O₃ nanosheets for high-performance solar blind photodetectors†

Wei Feng,^ac Xiaona Wang,^a Jia Zhang,^a Lifeng Wang,^a Wei Zheng,^a PingAn Hu,*^a Wenwu Cao^b and Bin Yang^b

* Corresponding authors

^a Key Lab of Microsystem and Microstructure of Ministry of Education, Harbin Institute of Technology, No. 2 YiKuang Street, Harbin, China
E-mail: hupa@hit.edu.cn

^b Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin 150080, China

^c School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China

Abstract

Two-dimensional (2D) semiconductors are limited to graphene analogues of layered materials, so it is extremely challenging to fabricate 2D non-layered materials with thicknesses of only a few atomic layers. Here, we report the successful fabrication of 2D Ga₂O₃ from the corresponding GaSe nanosheets and a solar blind photodetector based on 2D Ga₂O₃. The as-prepared 2D β-Ga₂O₃ is polycrystalline and has a thickness of less than 10 nm. Furthermore, we demonstrate a photodetector based on 2D β-Ga₂O₃, which show a sensitive, fast and stable photoresponse to ultraviolet radiation (254 nm). The responsivity, detectivity and external quantum efficiency of the photodetector are 3.3 A W⁻¹, 4.0 × 10¹² Jones and 1600%, respectively, indicating that the 2D Ga₂O₃ has great potential for application for solar-blind photodetectors.

This article is part of the themed collection: Emerging Investigators

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Article information

DOI: https://doi.org/10.1039/C3TC31899K
Article type: Paper
Submitted: 26 Sep 2013
Accepted: 31 Oct 2013
First published: 11 Dec 2013

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J. Mater. Chem. C, 2014,2, 3254-3259

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Synthesis of two-dimensional β-Ga₂O₃ nanosheets for high-performance solar blind photodetectors

W. Feng, X. Wang, J. Zhang, L. Wang, W. Zheng, P. Hu, W. Cao and B. Yang, J. Mater. Chem. C, 2014, 2, 3254 DOI: 10.1039/C3TC31899K

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Journal of Materials Chemistry C