Issue 6, 2012
From the journal:

CrystEngComm

Transparent and flexible selenium nanobelt-based visible light photodetector

Lin-Bao Luo,*a   Xiao-Bao Yang,*b   Feng-Xia Liang,c   Jian-Sheng Jie,*a   Qiang Li,a   Zhi-Feng Zhu,a   Chun-Yan Wu,a   Yong-Qiang Yua  and  Li Wanga  

* Corresponding authors

a School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, Anhui, P. R. China
E-mail: luolb@hfut.edu.cn, jsjie@hfut.edu.cn

b Department of Physics, South China University of Technology, Guangzhou, Guangdong Province, P. R. China
E-mail: scxbyang@scut.edu.cn

c Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong SAR, P. R. China

Abstract

We report a synthesis of single-crystal [001] oriented selenium nanobelts (SeNBs) through a simple vacuum evaporation at 250 °C. The width and thickness of the SeNBs are in the range of 100–800 nm and 20–90 nm, respectively. I–V analysis of an individual SeNB based field effect transistor (FET) reveals typical p-type electrical conduction. The hole mobility and concentration are respectively estimated to 0.63 cm2 (V s)−1 and 9.35 × 1016 cm−3. The p-type electrical characteristics can be explained by the surface termination model, according to which, H- or OH- termination can induce a defect level slightly above the valance band maximum (VBM). A fully transparent and flexible visible light photodetector assembled on a polyethylene terephthalate (PET) substrate shows a high sensitivity to visible light illumination, with sensitivity and conductive gain as high as 3.27 × 104 A W−1 and 6.77 × 104 respectively. Furthermore, the device also exhibits a stable performance and good reproducibility under different bending conditions. The high-performance visible light photodetector would enable application opportunities in future flexible and transparent electronics.

Graphical abstract: Transparent and flexible selenium nanobelt-based visible light photodetector

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Article information

DOI
https://doi.org/10.1039/C2CE06420K
Article type
Paper
Submitted
25 Oct 2011
Accepted
06 Dec 2011
First published
23 Jan 2012

CrystEngComm, 2012,14, 1942-1947

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Transparent and flexible selenium nanobelt-based visible light photodetector

L. Luo, X. Yang, F. Liang, J. Jie, Q. Li, Z. Zhu, C. Wu, Y. Yu and L. Wang, CrystEngComm, 2012, 14, 1942 DOI: 10.1039/C2CE06420K

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