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论文类型：期刊论文

发表时间：2014-11-04

发表刊物：POLYHEDRON

收录刊物：SCIE、Scopus

卷号：82

期号：,SI

页面范围：71-79

ISSN号：0277-5387

关键字：Dye-sensitized solar cells; Energy conversion; Ruthenium complexes; Synthesis; Photovoltaics

摘要：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.