Efficient light-to-electrical energy conversion with dithiocarbamate-ruthenium polypyridyl sensitizers
- Centro di Studio su Fotoreattivita e Catalisi CNR, Ferrara (Italy). Dipt. di Chimica dell`Universita
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Chemistry
New Ru(dcbH)(dcbH{sub 2})(L) sensitizers, where L is diethyldithiocarbamate, dibenzyldithiocarbamate, or pyrrolidinedithiocarbamate, dcbH is 4-(COOH)-4{prime}-(COO{sup {minus}})-2,2{prime}-bipyridine, and dcbH{sub 2} is 4,4{prime}-(COOH){sub 2}-2,2{prime}-bipyridine, have been synthesized, characterized, and anchored to nanocrystalline TiO{sub 2} films for light to electrical energy conversion in regenerative photoelectrochemical cells with I{sup {minus}}/I{sub 2} acetonitrile electrolyte. The sensitizers have intense metal-to-ligand charge-transfer (MLCT) bands centered {approximately}380 and 535 mm that sensitize TiO{sub 2} over a notably broad spectral range. The photophysical and photoelectrochemical studies of these materials are contrasted with cis-Ru(dcbH{sub 2}){sub 2}(NCS){sub 2}, which is one of the most efficient sensitizers reported to date. Photophysical measurements show that the high photocurrent observed for cis-Ru(dcb){sub 2}(NCS){sub 2}TiO{sub 2} is due to efficient and rapid iodide oxidation.
- Sponsoring Organization:
- USDOE, Washington, DC (United States); North Atlantic Treaty Organization, Brussels (Belgium)
- OSTI ID:
- 669920
- Journal Information:
- Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 18 Vol. 37; ISSN 0020-1669; ISSN INOCAJ
- Country of Publication:
- United States
- Language:
- English
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