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https://hdl.handle.net/10119/4951
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| Title: | Organization of Supramolecular Assemblies of Fullerene, Porphyrin and Fluorescein Dye Derivativeson on TiO_2 Nanoparticles for Light Energy Conversion |
| Authors: | Hasobe, Taku
Hattori, Shigeki
Kamat, Prashant V.
Urano, Yasuteru
Umezawa, Naoki
Nagano, Tetsuo
Fukuzumi, Shunichi |
| Issue Date: | 2005-12-07 |
| Publisher: | Elsevier |
| Magazine name: | Chemical Physics |
| Volume: | 319 |
| Number: | 1-3 |
| Start page: | 243 |
| End page: | 252 |
| DOI: | 10.1016/j.chemphys.2005.06.035 |
| Abstract: | TiO_2 nanoparticles were modified with a porphyrin derivative, 5-[4-benzoic acid]-10,15,20-tris[3,5-di-tert-butylphenyl]-21H,23H-porphyrin (H_2P-COOH), and fluorescein derivatives, 9-[2-(3-carboxy-9,10-diphenyl)anthryl]-2,7-difluoro-6-hydroxy-3H-xanthen-3-one (DPAX-COOH) and 2′,7′-difluorofluorescein (FL-COOH). The dye-modified TiO_2 nanoparticles were deposited on nanostructured OTE/SnO_2 electrode together with nanoclusters of fullerene (C_<60>) in acetonitrile/toluene (3:1, v/v) using an electrophoretic deposition technique to afford the dye-modified TiO_2 composite electrode denoted as OTE/SnO_2/(dye + C_<60>)_n. The dye-modified TiO_2 composite electrodes have broad as well as high absorbance properties in the visible region, exhibiting the photoactive response under visible light excitation using I_3^-/I^- redox couple. The incident photon to photocurrent efficiency (IPCE) increases in order: OTE/SnO_2/(H_2P)_n < OTE/SnO_2/(H_2P-COO–TiO_2)_n < OTE/SnO_2/(H_2P-COO–TiO_2 + C_<60>). The IPCE value can be further improved by replacing H_2P-COOH with a fluorescein derivative containing an electron donor moiety: DPAX-COOH (DPA: diphenylanthracene). The maximum IPCE value (42%) is obtained for OTE/SnO_2/(DPAX-COO–TiO_2 + C_<60>)_n under the bias of 0.2 V vs. SCE. |
| Rights: | NOTICE: This is the author's version of a work accepted for publication by Elsevier. Taku Hasobe, Shigeki Hattori, Prashant V. Kamat, Yasuteru Urano, Naoki Umezawa, Tetsuo Nagano and Shunichi Fukuzumi , Chemical Physics, 319(1-3), 2005, 243-252, http://dx.doi.org/10.1016/j.chemphys.2005.06.035 |
| URI: | https://hdl.handle.net/10119/4951 |
| Material Type: | author |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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