Hong Lin, Yizhu Liu, Chuanxin Liu
Apr 1, 2011
Citations
0
Influential Citations
18
Citations
Journal
Journal of Electroanalytical Chemistry
Abstract
Abstract Surface treatment of ruthenium dye (Bu 4 N) 2 [Ru(dcbpyH) 2 (NCS) 2 ]-sensitized TiO 2 films using diethyl 4-methylphenylphosphonate as a coadsorbent results in large improvements in DSC performance, 24% larger overall conversion efficiency and 55 mV higher open-circuit voltage without current penalty. Introducing another two coadsorbents ethyl 4-methylphenylphosphonate and 4-methoxyphenylphosphonic acid brings in negative effects. Analysis by impedance spectroscopy indicated that this was attributed to different numbers of proton-releasing hydroxyl groups of the coadsorbents and consequently different proton-adsorbing chemical environments on the surface of TiO 2 photoanodes.