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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.)

Polypyridyl ruthenium complexes containing anchoring nitrile groups as TiO2 sensitizers for application in solar cells

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Mecchia Ortiz, Juan H. [1] ; Longo, Claudia [2] ; Katz, Nestor E. [1]
Total Authors: 3
[1] Univ Nacl Tucuman, INQUINOA CONICET, Inst Quim Fis, Fac Bioquim Quim & Farm, San Miguel De Tucuman - Argentina
[2] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Inorganic Chemistry Communications; v. 55, p. 69-72, MAY 2015.
Web of Science Citations: 4

Ruthenium polypyridyl complexes of general formula {[}Ru(bpy)(3 - x)(Mebpy-CN)(x)](2+) (x = 1,2 and 3, bpy = 2,2'-bipyridine, Mebpy-CN = 4-methyl-2,2'-bipyridine-4'-carbonitrile) can be used as visible dyes in novel solar cells formed with a porous TiO2 film (1 cm(2)), Pt counter-electrode and iodine/iodide as the redox mediator electrolyte dissolved in a polymeric matrix. These complexes can be anchored over the surface of nanocrystalline TiO2 through nitrile groups, as evidenced by Raman spectra of the adsorbed species. Irradiated by a solar simulator (67 mW cm(-2)), the cells assembled with the Ru complexes with x = 2 and 3 as TiO2 sensitizers exhibit almost identical current-potential curves, with short-circuit photocurrents of 1.25 mA cm(-2), fill factors of 0.5 and overall efficiencies around 0.44%. The Ru complex with x = I and a similar Re complex did not perform as well as sensitizers. These data were consistent with results obtained from quantum efficiency curves and impedance spectra. We conclude that complexes with nitrite groups as anchoring entities are promising candidates for designing efficient DSCCs. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 08/57867-8 - National Institute for Research, Development and Innovation in Functional Complex Materials
Grantee:Fernando Galembeck
Support type: Research Projects - Thematic Grants
FAPESP's process: 08/06059-9 - Semiconductor oxide electrodes for application in solar cells and for water purification by heterogeneous photocatalysis
Grantee:Claudia Longo
Support type: Regular Research Grants