Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 3, Issue 6, Pages 789-795Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b922354a
Keywords
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Funding
- Spanish Ministry of Science and Innovation, MICINN [ENE2008-04373, PIE-200860I134, BES-2009-028996]
- Consolider NANOSELECT [CSD2007-00041]
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Electrodes made of vertically-aligned ZnO nanorods (NRs) have been prepared and analyzed in dye sensitized solar cells (DSC). We report a similar to 20% power conversion efficiency increase during the first hours of solar cell testing at 1000 W m(-2) (AM 1.5). The latter has been attributed to the physisorption/chemisorption of the N-719 dye on the ZnO NRs induced by UV-light irradiation. The ZnO NRs were grown by the hydrothermal method for 6 h obtaining a ZnO layer thickness of about 1.8 mu m. The highest solar cell efficiency obtained was 0.69% after UV light irradiation (at 72 degrees C, 0.63 V, 2.85 mA cm(-2), 0.39 FF). The effect of UV light has been monitored by UV-VIS, IV-curves and IPCE analyses with time, and has been related to the solar cell performance.
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