Indexed by:期刊论文

Date of Publication:2014-11-04

Journal:POLYHEDRON

Included Journals:SCIE、Scopus

Volume:82

Issue:,SI

Page Number:71-79

ISSN No.:0277-5387

Key Words:Dye-sensitized solar cells; Energy conversion; Ruthenium complexes; Synthesis; Photovoltaics

Abstract: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 (T-d) of around 330 degrees C. The DSSC device using the Ru(II) dye with the 9-tolylcarbazole chromophore exhibited the highest power conversion efficiency (eta) up to 3.39%, with a short-circuit photocurrent density (J(sc)) of 8.06 mA cm(-2), an open-circuit photovoltage (V-oc) of 0.62 V and a high fill factor (ff) of 0.68 under illumination of an AM 1.5 solar cell simulator. (C) 2014 Elsevier Ltd. All rights reserved.