A new 1H-pyridin-(2E)-ylidene ruthenium complex as sensitizer for a dye-sensitized solar cell
Makaleler > Tam Makale · 2013
Yazarlar: Cigdem Sahin, CANAN VARLIKLI, Ceylan ZAFER, Qi Shi, Richard E. Douthwaite
Journal of Coordination Chemistry, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2013, cilt 66, ss 1384-1395
DOI: 10.1080/00958972.2013.782486
Özet
The new heteroleptic ruthenium(II) complex containing a 1H-pyridin-(2E)-ylidene (PYE) ligand was synthesized and characterized using UV/Vis, FTIR, and NMR spectroscopies, mass spectrometry, elemental analysis, and cyclic voltammetry. The photovoltaic performance of the ruthenium complex as a charge transfer photosensitizer in nc-titanium dioxide based dye-sensitized solar cell was studied and compared with cis-bis(isothiocyanato)(2,2′-bipyridyl-4,4′-dicarboxylato)(2,2′-bipyridyl-4,4′-di-nonyl)ruthenium(II) (Z907) under standard AM 1.5 sunlight. The complex CS90 gave a photocurrent density of 1.80 mA cm−2, 400 mV open-circuit potential, and 0.58 fill factor yielding an efficiency of 0.42% where the reference Z907 yielded an efficiency of 4.12%. The decrease in conversion efficiency observed for CS90 is attributed to a steric interaction between PYE and the TiO2 surface that prevents optimum binding and also restricts ligand dynamics that are associated with oxidation state changes.