Issue 5, 2012
From the journal:

Journal of Materials Chemistry

Aligned networks of cadmium sulfidenanowires for highly flexible photodetectors with improved photoconductive responses†

Kwang Heo,‡a   Hyungwoo Lee,‡b   Yongju Park,c   Jinho Park,d   Hyun-Jin Lim,e   Duhee Yoon,e   Changhee Lee,c   Miyoung Kim,d   Hyeonsik Cheong,e   Jonghyurk Park,f   Jikang Jian*g  and  Seunghun Hong*abh  

* Corresponding authors

a Interdisciplinary Program in Nano-Science and Technology, Seoul National University, Seoul, Korea

b Department of Physics and Astronomy, Seoul National University, Seoul, Korea

c School of Electrical Engineering and Computer Science, Seoul National University, Seoul, Korea

d Department of Materials Science and Engineering, Seoul National University, Seoul, Korea

e Department of Physics, Sogang University, Seoul, Korea

f Convergence Components & Materials Research Laboratory, ETRI, Daejeon, Korea

g Department of Physics, Xinjiang University, Urumqi, Xinjiang, P. R. China
E-mail: jikangjian@gmail.com

h Department of Biophysics and Chemical Biology, Seoul National University, Seoul, Korea
E-mail: seunghun@snu.ac.kr

Abstract

We developed a simple but efficient method to mass-produce highly flexible and high-performance photodetectors based on aligned cadmium sulfide (CdS) nanowire (NW) networks. In this method, the CdS NWs were selectively aligned along the molecular patterns on flexible substrates via a direct assembly method, and the aligned CdS NW patterns were utilized as the channels of flexible photodetectors. The photodetectors based on the aligned CdS NWs exhibited ∼10 times higher photosensitivity and ∼100 times faster photoresponse than those based on randomly oriented NW networks. In addition, the flexible photodetectors exhibited stable photoconductive characteristics even when these were bent down to the radius of curvature of 0.2 mm. This research may pave the way for the large-scale fabrication of low-cost and high performance flexible photodetectors based on the aligned NW networks.

Graphical abstract: Aligned networks of cadmium sulfide nanowires for highly flexible photodetectors with improved photoconductive responses

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Supplementary files

Article information

DOI
https://doi.org/10.1039/C2JM14359C
Article type
Paper
Submitted
03 Sep 2011
Accepted
19 Nov 2011
First published
14 Dec 2011

J. Mater. Chem., 2012,22, 2173-2179

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Aligned networks of cadmium sulfide nanowires for highly flexible photodetectors with improved photoconductive responses

K. Heo, H. Lee, Y. Park, J. Park, H. Lim, D. Yoon, C. Lee, M. Kim, H. Cheong, J. Park, J. Jian and S. Hong, J. Mater. Chem., 2012, 22, 2173 DOI: 10.1039/C2JM14359C

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