http://dx.doi.org/10.1016/j.poly.2014.04.059">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Optimizing the photovoltaic performance of thiocyanate-free ruthenium photosensitizers by structural modification of C^N cyclometalating ligand in dye-sensitized solar cells

Language

English

Abstract

© 2014 Elsevier Ltd. All rights reserved. Five new thiocyanate-free ruthenium(II) complexes with different electron-donating functionalized cyclometalating ligands C^N were synthesized, characterized and applied as photosensitizers in dye-sensitized solar cells (DSSCs). Their photophysical, electrochemical, thermal and photovoltaic properties have been investigated and density functional theory (DFT) calculations have been carried out on these dyes. These dyes exhibit good thermal stability with the onset decomposition temperature at 5% weight-loss (Td) of around 330 °C. The DSSC device using the Ru(II) dye with the 9-tolylcarbazole chromophore exhibited the highest power conversion efficiency (η) up to 3.39%, with a short-circuit photocurrent density (Jsc) of 8.06 mA cm-2, an open-circuit photovoltage (Voc) of 0.62 V and a high fill factor (ff) of 0.68 under illumination of an AM 1.5 solar cell simulator.

Keywords

Dye-sensitized solar cells, Energy conversion, Photovoltaics, Ruthenium complexes, Synthesis

Publication Date

2014

Source Publication Title

Polyhedron

Volume

82

Start Page

71

End Page

79

Publisher

Elsevier

ISSN (print)

02775387

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