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Photovoltaic Characteristics of Dye-Sensitized Surface-Modified Nanocrystalline SnO2 Solar Cells
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- Authors
- Nam-Gyu Park, Man Gu Kang, Kwang Sun Ryu, Kwang Man Kim, Soon Ho Chang
- Issue Date
- 2004-01
- Citation
- Journal of Photochemistry and Photobiology A: Chemistry, v.161, no.2-3, pp.105-110
- Language
- English
- Type
- Journal Article
- Abstract
- Zinc-modified nanocrystalline SnO2 electrodes are prepared by chemical treatment of the commercial SnO2 colloid with zinc acetate and their thickness effects on photovoltaic characteristics are investigated. Open-circuit voltage (Voc) and fill factor increase with increasing zinc concentration, while short-circuit photocurrent (Jsc) decreases. The normalized incident photon-to-current conversion efficiency (IPCE) shows that increase of zinc concentration utilizes long wavelength light. Concerning the conversion efficiency, optimal concentration within the present experiment is found to be 10 mol.% Zn2+ with respect to Sn4+. As increasing thickness of the films based on 10 mol.% zinc-modified SnO2 ranging from 0.76 to 8.12 μm, Jsc increases, reaches maximum and then decreases without change in Voc. The highest conversion efficiency of about 3.4% is achieved under 1 sun of AM 1.5 irradiation for the ~6.3 μm-thick 10 mol.% zinc-modified SnO2 film with Jsc of 9.09 mA/cm2, Voc 600 mV and fill factor 62%. © 2004 Elsevier B.V. All rights reserved.
- KSP Keywords
- Conversion efficiency(C.E.), Dye-sensitized, Incident photon-to-current conversion efficiency(IPCE), Long wavelength light, Open circuit voltage(VOC), Optimal concentration, Photovoltaic characteristics, Short-circuit photocurrent, Solar Cells, Surface-modified, Zinc acetate