期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 7, 期 11, 页码 2662-2669出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201200507
关键词
benzoporphyrins; cyclic voltammetry; density functional calculations; dyes; pigments; dye-sensitized solar cells
资金
- Miami University
- Ohio Board of Reagents
- U.S Air Force Office of Scientific Research [FA9550-10-1-0377]
- National Science Foundation [CHE0839233]
New opp-dibenzoporphyrins were prepared in a concise method that was based on a Pd0-catalyzed cascade reaction. These porphyrins, which contained carboxylic-acid linker groups on benzene rings that were fused to the porphyrin at their beta,beta'-positions, were examined as sensitizers for dye-sensitized solar cells for the first time. Whereas all of the porphyrins showed solar-energy-to-electricity conversion, an opp-dibenzoporphyrin with conjugated carboxylic-acid linkers displayed the highest conversion efficiency and an exceptionally high Jsc value. Cyclic voltammetry of these porphyrins suggested that the fusion of two aromatic benzene rings onto the periphery of the porphyrin lowered the HOMOLUMO energy gap; the incorporation of a conjugated carboxylic-acid linker group decreased the HOMOLUMO gap even further. These CV data are consistent with DFT calculations for these porphyrins and agree well with the UV/Vis absorption- and fluorescence spectra of these porphyrins.
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