Development of Dye-Sensitized Solar Cells with Sputtered N-Doped TiO2 Thin Films: From Modeling the Growth Mechanism of the Films to Fabrication of the Solar Cells

Development of Dye-Sensitized Solar Cells with Sputtered N-Doped TiO2 Thin Films: From Modeling the Growth Mechanism of the Films to Fabrication of the Solar Cells

Author Duarte, D. A. Google Scholar
Massi, Marcos Autor UNIFESP Google Scholar
Silva Sobrinho, A. S. da Google Scholar
Institution Technol Inst Aeronaut
Universidade Federal de São Paulo (UNIFESP)
Abstract In this paper, nitrogen-doped TiO2 thin films were deposited by DC reactive sputtering at different doping levels for the development of dye-sensitized solar cells. the mechanism of film growth during the sputtering process and the effect of the nitrogen doping on the structural, optical, morphological, chemical, and electronic properties of the TiO2 were investigated by numerical modeling and experimental methods. the influence of the nitrogen doping on the working principle of the prototypes was investigated by current-voltage relations measured under illuminated and dark conditions. the results indicate that, during the film deposition, the control of the oxidation processes of the nitride layers plays a fundamental role for an effective incorporation of substitutional nitrogen in the film structure and cells built with nitrogen-doped TiO2 have higher short-circuit photocurrent in relation to that obtained with conventional DSSCs. On the other hand, DSSCs built with nondoped TiO2 have higher open-circuit voltage. These experimental observations indicate that the incorporation of nitrogen in the TiO2 lattice increases simultaneously the processes of generation and destruction of electric current.
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
PRONEX
Grant number PRONEX: 11/50773-0
Date 2014-01-01
Published in International Journal of Photoenergy. New York: Hindawi Publishing Corporation, 13 p., 2014.
ISSN 1110-662X (Sherpa/Romeo, impact factor)
Publisher Hindawi Publishing Corporation
Extent 13
Origin http://dx.doi.org/10.1155/2014/839757
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000332560900001
URI http://repositorio.unifesp.br/handle/11600/37157

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