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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Single precursor route to efficient cobalt sulphide counter electrodes for dye sensitized solar cells

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Congiu, M. [1] ; Albano, L. G. S. [1] ; Decker, F. [1, 2] ; Graeff, C. F. O. [1, 3]
Total Authors: 4
[1] Univ Estadual Paulista, UNESP, POSMAT Programa Posgrad Ciencia & Tecnol Mat, BR-17033360 Bauru, SP - Brazil
[2] Univ Roma La Sapienza, Dept Chem, I-00185 Rome, RM - Italy
[3] Univ Estadual Paulista, DC FC UNESP, BR-17033360 Bauru, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Electrochimica Acta; v. 151, p. 517-524, JAN 1 2015.
Web of Science Citations: 13

In this work a novel preparation method is proposed for the one step synthesis and thin-film deposition of cost effective counter electrodes for dye sensitized solar cells (DSSC). This method is fast and allows depositing CoS nanoparticles onto F-doped SnO2 (FTO) substrates within 2 hours. The cost of reagents needed is significantly less than the cost of the products based on hexachloroplatinic acid used in the production of platinum transparent counter electrodes, and the method is compatible with the ink-jet and screen-printing technologies. The whole process does not require expensive equipment and is of simple implementation. Electrochemical Impedance Spectroscopy, Cyclic Voltammetry and I-V curves under simulated sunlight were used to characterize the electrode efficiency and stability. The counter electrodes prepared according to our procedure were transparent and show good catalytic activity with the I-/I-3-redox couple in a high stability electrolyte for DSSC (HSE). Under the best deposition conditions the charge transfer resistance of the electrodes was 1.3 Omega cm(2), less than that of the screen printed platinum on FTO glass (2.3 Omega cm(2)). Power conversion efficiencies up to 6.6% were reached using the CoS counter electrodes. The optimized CoS counter electrodes were demonstrated to work also with a ferrocene besed redox liquid electolyte. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/07396-7 - New materials for dye-sensitized solar cells
Grantee:Mirko Congiu
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/25028-5 - Global evaluation and optimization of dye sensitized hybrid solar cells
Grantee:Carlos Frederico de Oliveira Graeff
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
Grantee:Elson Longo da Silva
Support type: Research Projects - Thematic Grants