Abstract
Photoinduced electron transfer from the charge-transfer excited states of Ru(tpy)(bpy(COOH)2)CN+, Ru(tpy) (bpy(COOH)2)Cl+, Ru(tpy)(bpy(COOH)2) H2O2+, and Ru(tpy)(bqu(COOH)2)Cl+ to the conduction band of TiO2 has been studied through photoelectrochemical methods. Ru(tpy)(bpy(COOH)2) CN+ produced the highest current density and open-circuit photovoltage, whereas Ru(tpy)(bqu(COOH)2)Cl+ produced the lowest values. A potential barrier was employed to explain the experimental result that the rate of the electron transfer increases with increasing the energy difference between the donor and acceptor. A sensitizer with a high current density yielded a high photovoltage and a high conversion efficiency. The reduction rate of the oxidized sensitizer decreased with the increases in the reduction potential of the sensitizer, resulting in a poor stability of a photoelectrochemical cell.
Original language | English |
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Pages (from-to) | 567-572 |
Number of pages | 6 |
Journal | Bulletin of the Korean Chemical Society |
Volume | 18 |
Issue number | 6 |
Publication status | Published - 1997 |
ASJC Scopus subject areas
- Chemistry(all)