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International Journal of Photoenergy
Volume 2012 (2012), Article ID 879261, 6 pages
http://dx.doi.org/10.1155/2012/879261
Research Article

Effect of Sheet Resistance and Morphology of ITO Thin Films on Polymer Solar Cell Characteristics

1Materials Science Programme, Indian Institute of Technology Kanpur, Kanpur 208016, India
2Department of Electrical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India

Received 8 October 2011; Accepted 21 December 2011

Academic Editor: Bhushan Sopori

Copyright © 2012 Ram Narayan Chauhan 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

Solar cell fabrication on flexible thin plastic sheets needs deposition of transparent conducting anode layers at low temperatures. ITO thin films are deposited on glass by RF sputtering at substrate temperature of 7 0 C and compare their phase, morphology, optical, and electrical properties with commercial ITO. The films contain smaller nanocrystallites in (222) preferred orientation and exhibit comparable optical transmittance (~95%) in the wavelength range of 550–650 nm, but high sheet resistance of ~103 Ω/□ (the value being ~36 Ω/□ for commercial ITO).The polymer solar cells with PEDOT: PSS and P3HT: PCBM layers realized on RF sputtered vis-a-vis commercial ITO thin films are shown to display a marginal difference in power conversion efficiency, low fill factor, and low open-circuit voltage but increased short-circuit current density. The decrease in fill factor, open-circuit voltage is compensated by increased short-circuit current. Detailed study is made of increased short-circuit current density.