| Summary: | 碩士 === 國立臺灣大學 === 高分子科學與工程學研究所 === 97 === The main purpose of this research is to study co-sensitization in the dye-sensitized solar cell (DSSC) .
As DSSC, photon-to-electron conversion efficiency is depend on the range of wavelength dye absorbs and the rate of electron shift from dye to electrode. The dye used in DSSC generally absorb light with 400nm-600nm in wavelength for the most of part while light-absorption is weak beyond 600nm. In this study, therefore, blending dyes is for extending the range of light absorption and improving the efficiency of DSSC further.
The common ruthenuim complex, N3 (cis-di(thiocyanato)-bis(2,2''-bipyridyl -4,4''-dicarboxylic acid)-ruthenium(II)，Ru(dcbpy)2(SCN)2), and phthalcyano ruthenium complex, bis(3,4-dicarboxypyridine)-(phthalocyanato) ruthenium(II)，PcRu(dcpy)2, which mainly absorb red radiation zone are chosen to fabricate co-sensitized DSSC. In order to taking both extension of light absorption and increasing adsporption of dyes, a layer of Al2O3 thin-film is inseted into synthsyized N3 and PcRu(dcpy)2.
However, the results reveal that the energy band of PcRu(dcpy)2與N3 can not macth. EHOMO of the former is too high to obstruct the shifting of holes so that the circurt is cutted.
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