Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/35143
標題: Synthesis, Optical and Photovoltaic Properties of Porphyrin Dyes
作者: Lee, M.W.
葉鎮宇
Lee, D.L.
Yen, W.N.
Yeh, C.Y.
李明威
關鍵字: Dye-sensitized solar cells
porphyrin
photoelectrochemical processes
optical absorption
sensitized solar-cells
titanium-dioxide
photoelectrochemical
properties
molecular design
tio2 electrodes
light
conversion
derivatives
electricity
adsorption
期刊/報告no:: Journal of Macromolecular Science Part a-Pure and Applied Chemistry, Volume 46, Issue 7, Page(s) 730-737.
摘要: The synthesis and optical absorption of a series of porphyrins, and the photoelectrochemical properties of TiO2 solar cells sensititized with these porphyrins was investigated. The different types of porphyrins studied are designated by numbers: the reference compound 1 (Zinc(II) 5,15-bis(4-carboxylphenyl)porphyrin), porphyrin substituted with one triarylamine unit 2, and porphyrin substituted with two triarylamine units 3. The UV-Vis absorption spectra reveal that the substitutions result in large redshifts in both the Soret band ( 60 nm) and the Q bands ( 125 nm), as well as enhancement of optical absorption. The enhancement is even more pronounced in the long-wavelength region of 575-725 nm, where the absorption of porphyrin 3 is eight times that of porphyrin 1. The photoelectrochemical properties of the porphyrins were also studied by constructing porphyrin-sensitized TiO2 solar cells. Under standard AM 1.5 sunlight, the porphyrin 1 cell yields a short-circuit current of 1.26 mA/cm2, an open-circuit voltage of 0.564 V, and a fill factor of 61%. The incident photon-to-current conversion efficiency is 24% for porphyrin 1 and 5-7% for porphyrins 2 and 3 at the Soret peak.
URI: http://hdl.handle.net/11455/35143
ISSN: 1060-1325
文章連結: http://dx.doi.org/10.1080/10601320902938558
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