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The Scientific World Journal
Volume 2013, Article ID 798713, 5 pages
http://dx.doi.org/10.1155/2013/798713
Research Article

A Novel Method for Preparation of Zn-Doped CuInS2 Solar Cells and Their Photovoltaic Performance

1Department of Chemical and Materials Engineering, Minghsin University of Science and Technology, Hsinfeng, Hsinchu 304, Taiwan
2Weapon System Center, Chung Cheng Institute of Technology, NDU, Daxi, Taoyuan 335, Taiwan

Received 3 August 2013; Accepted 30 September 2013

Academic Editors: K. Máthis and Z. Peng

Copyright © 2013 Cheng-Hsiung Peng and Chyi-Ching Hwang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study, a novel method was proposed to synthesize high quality Zn-doped CuInS2 nanocrystals under high frequency magnetic field at ambient conditions. The magnetic Zn-doping gave superparamagnetic heating of the resulting nanocrystals via magnetic induction, causing an accelerating growth rate of the doped CuInS2 under ambient conditions faster than conventional autoclave synthesis. Shape evolution of the Zn-doped CuInS2 nanocrystals from initially spherical to pyramidal, to cubic, and finally to a bar geometry was detected as a function of time of exposure to magnetic induction. These colloidal solvents with different shaped nanocrystals were further used as “nanoink” to fabricate a simple thin film solar device; the best efficiency we obtained of these crystals was 1.01% with a 1.012 μm thickness absorber layer (bar geometry). The efficiency could be promoted to 1.44% after the absorber was thickened to 2.132 μm.