Issue 19, 2012
From the journal:

Journal of Materials Chemistry

Efficient multispectral photodetection using Mn doped ZnO nanowires†

Rajiv Ramanujam Prabhakar,a   Nripan Mathews,*b   K B Jinesh,a   K R G Karthik,b   Stevin Snellius Pramana,b   Binni Varghese,c   Chorng Haur Sowc  and  Subodh Mhaisalkar*ab  

* Corresponding authors

a Energy Research Institute, Nanyang Technological University, Research Techno Plaza, Singapore
E-mail: subodh@ntu.edu.sg

b School of Materials Science and Engineering, Nanyang Technological University, Singapore
E-mail: nripan@ntu.edu.sg

c Department of Physics, National University of Singapore, Singapore

Abstract

Crystalline Mn doped ZnO nanowires were synthesized by chemical vapour deposition. The presence of Mn dopant was confirmed by X-Ray diffraction, Raman spectroscopy, transmission electron microscopy and X-Ray photoelectron spectroscopy. The photoconductivity of an individual Mn doped ZnO nanowire was investigated under different visible light excitations (532 and 405 nm). The nanowire exhibited high dark to photocurrent ratios (∼50), fast photocurrent response (∼100–250 ms), and reasonably high responsivity and external quantum efficiencies with good repeatability under different visible light illuminations. These results indicate that Mn doped ZnO nanowires would be promising for efficient multispectral photodetectors and optical switches.

Graphical abstract: Efficient multispectral photodetection using Mn doped ZnO nanowires

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Article information

DOI
https://doi.org/10.1039/C2JM16698D
Article type
Paper
Submitted
20 Dec 2011
Accepted
02 Mar 2012
First published
05 Apr 2012

J. Mater. Chem., 2012,22, 9678-9683

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Efficient multispectral photodetection using Mn doped ZnO nanowires

R. R. Prabhakar, N. Mathews, K. B. Jinesh, K. R. G. Karthik, S. S. Pramana, B. Varghese, C. H. Sow and S. Mhaisalkar, J. Mater. Chem., 2012, 22, 9678 DOI: 10.1039/C2JM16698D

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