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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.)

Synthesis, characterization and introduction of a new ion-coordinating ruthenium sensitizer dye in quasi-solid state TiO2 solar cells

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Author(s):
White, Ryan C. [1] ; Benedetti, Joao E. [1] ; Goncalves, Agnaldo D. [1] ; Romao, Wanderson [2] ; Vaz, Boniek G. [2] ; Eberlin, Marcos N. [2] ; Correia, Carlos R. D. [3] ; De Paoli, Marco A. [1] ; Nogueira, Ana F. [1]
Total Authors: 9
Affiliation:
[1] Univ Campinas UNICAMP, Inst Chem, Lab Nanotechnol & Solar Energy, BR-13083970 Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Inst Chem, Thomson Mass Spectrometry Lab, BR-13083970 Campinas, SP - Brazil
[3] Univ Campinas UNICAMP, Inst Chem, Lab Synth Organ Subst, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 222, n. 1, p. 185-191, JUL 5 2011.
Web of Science Citations: 10
Abstract

A new ion-coordinating heteroleptic ruthenium(II) dye was synthesized by attaching two crown ether moieties in the 4,4' positions of one of the bipyridine ligands. This new dye (named as RC730) was characterized by UV-Vis spectroscopy, CHN elemental analysis, NMR and electrospray ionization Fourier transform-ion cyclotron resonance mass spectrometry (ESI FT-ICR MS). In order to investigate the properties of these ion-coordinating species, dye-sensitized solar cells were assembled with a gel polymer electrolyte based on two different cations: lithium and sodium. The devices were characterized by J-V curves under 100 mW cm(-2), incident photon to current conversion efficiency spectra (IPCE) and photovoltage decay transients under open-circuit conditions. The solar cells based on the new heteroleptic dye provided higher photocurrent and photovoltage when lithium was used in the electrolyte instead of sodium cations, reaching overall conversion efficiencies up to 2%. This behavior might be related to the ability of the ion-coordinating RC730 dye to trap Li ions, minimizing the conduction band edge shift. When the polymer electrolyte based on lithium is used, the IPCE spectra show a maximum efficiency of 31% at the maximum absorption peak of the RC730 dye (ca. 530 nm). (C) 2011 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 06/58998-3 - Preparation, characterization and application of gel polymer electrolyte in dye sensitized solar cells
Grantee:João Eduardo Benedetti
Support Opportunities: Scholarships in Brazil - Doctorate