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International Journal of Photoenergy
Volume 2013 (2013), Article ID 803126, 5 pages
http://dx.doi.org/10.1155/2013/803126
Research Article

Study of Small Molecule Organic Solar Cells Performance Based on Boron Subphthalocyanine Chloride and C60

1Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
2Department of Electronic Engineering, Fortune Institute of Technology, Kaohsiung 83160, Taiwan
3Department of Applied Physics, National University of Kaohsiung, Nanzih, Kaohsiung 81148, Taiwan

Received 15 September 2013; Accepted 3 October 2013

Academic Editor: Teen-Hang Meen

Copyright © 2013 Jhong-Ciao Ke 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

The small molecule organic solar cells based on boron subphthalocyanine chloride (SubPc) and C60 by varying the SubPc layer thickness from 3 nm to 21 nm were fabricated. The maximum power conversion efficiency (PCE) of 1.47% was obtained at the 9 nm SubPc layer under 100 mW/cm2 AM1.5G illumination, which is attributed to reach the optimal balance between the light absorption efficiency and the carrier collection efficiency in the device. To increase the open-circuit voltage ( ) of device, the molybdenum oxide (MoO3) and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) were inserted between the indium tin oxide and the SubPc layer, respectively. Finally, the of device increased from 0.46 V to 1 V by using MoO3 buffer layer, resulting in the fact that the PCE of device increased from 1.47% to 2.52%.