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International Journal of Photoenergy
Volume 2014, Article ID 219123, 8 pages
http://dx.doi.org/10.1155/2014/219123
Research Article

The Promotion of the Efficiency of Organic Photovoltaic Devices by Addition of Anisotropic CdSe Nanocrystals

1Department of Materials Science and Engineering, National Formosa University, Yunlin 63201, Taiwan
2Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan
3Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

Received 13 March 2014; Revised 28 April 2014; Accepted 30 April 2014; Published 21 May 2014

Academic Editor: Aung Ko Ko Kyaw

Copyright © 2014 Shu-Ru Chung et al. 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

CdSe nanocrystals (NCs) with different morphologies have been synthesized and applied as the acceptor in the active layer of the organic photovoltaic (OPV) devices. CdSe tetrapod (TP)/nanorod (NR) with zinc-blended seeds and wurtzite arms is prepared by seed growth method and mixed with poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). When the concentrations of CdSe in P3HT: PCBM system are 50 wt% optimally, the efficiency can be promoted about 4.3%, suggesting that an enhancement of 13.2% can be obtained and the addition of anisotropic CdSe NCs content in the active layer can be beneficial for the transport of electrons and light absorption in the OPV devices.