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dc.contributor.authorChang, Chih-Weien_US
dc.contributor.authorLuo, Liyangen_US
dc.contributor.authorChou, Chung-Kungen_US
dc.contributor.authorLo, Chen-Fuen_US
dc.contributor.authorLin, Ching-Yaoen_US
dc.contributor.authorHung, Chen-Shiungen_US
dc.contributor.authorLee, Yuan-Pernen_US
dc.contributor.authorDiau, Eric Wei-Guangen_US
dc.date.accessioned2014-12-08T15:09:08Z-
dc.date.available2014-12-08T15:09:08Z-
dc.date.issued2009-07-09en_US
dc.identifier.issn1932-7447en_US
dc.identifier.urihttp://dx.doi.org/10.1021/jp810580uen_US
dc.identifier.urihttp://hdl.handle.net/11536/6972-
dc.description.abstractWe measured femtosecond transient absorption of dye solutions and TiO(2) films sensitized with two zinc porphyrins (PE1 and PE4) to investigate the interfacial dynamics of electron transfer in relation to the dependence of cell performance on the length of the linker (Lin, C.-Y.; Lo, C.-F.; Luo, L.; Lu, H.-P.; Hung, C.-S.; Diau, E. W.-G. J. Phys. Chem. C 2009, 113, 755-764). For both porphyrins adsorbed on TiO(2) films with S(1) excitation (lambda(ex) = 620 nm), the transient absorption kinetics probed at 630 nm and 4.9 mu m are complementary to each other because only the excited-state and ground-state species were observed at 630 nm whereas only the charge-separation intermediates were observed at 4.9 mu m. The transient of the PE1/TiO(2) film shows a single exponential decay with a large offset, whereas the transient of the PE4/TiO(2) film displays a biexponential decay with a small offset. Because of the existence of an additional ps component, the amount of free delocalized electrons (offset signal) in PE4/TiO(2) is smaller than that in PEI/TiO(2). Our results imply that back electron transfer at the TiO(2)/dye interface is an important factor to be considered to account for the cell performance of a device.en_US
dc.language.isoen_USen_US
dc.titleFemtosecond Transient Absorption of Zinc Porphyrins with Oligo(phenylethylnyl) Linkers in Solution and on TiO(2) Filmsen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/jp810580uen_US
dc.identifier.journalJOURNAL OF PHYSICAL CHEMISTRY Cen_US
dc.citation.volume113en_US
dc.citation.issue27en_US
dc.citation.spage11524en_US
dc.citation.epage11531en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.department應用化學系分子科學碩博班zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.contributor.departmentInstitute of Molecular scienceen_US
Appears in Collections:Articles