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21. WIEAS: Helping to Discover Web Information Sources and Extract Data from Them

Author

Li, Liyu, Tang, Shiwei, Yang, Dongqing, Wang, Tengjiao, Deng, Zhihong, Su, Zhihua, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Yu, Jeffrey Xu, editor, Lin, Xuemin, editor, Lu, Hongjun, editor, and Zhang, Yanchun, editor

Published
2004
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36. Dye-sensitized solar cells based on (D−π−A)3L2 phenothiazine dyes containing auxiliary donors and flexible linkers with different length of carbon chain

Author

Guoqiang Wu, Xiaoli Yin, Jianping Huang, Derong Cao, Li Liyu, Xiaoning Liao, Wuying Yang, Hai Zhang, and Yanping Hong

Subjects
Open-circuit voltage, General Chemical Engineering, Energy conversion efficiency, 02 engineering and technology, Molar absorptivity, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, Electrochemistry, 01 natural sciences, 0104 chemical sciences, chemistry.chemical_compound, Dye-sensitized solar cell, chemistry, Phenothiazine, Molecule, 0210 nano-technology, Linker
Abstract

Four (D−π−A)3L2 phenothiazine dyes (PTZTB1−4) and a reported reference dye (R−SB) with a mono D−π−A chain were utilized as photosensitizers for dye-sensitized solar cells. In the skeleton of the dyes PTZTB1−4, three D−π−A chains (D−π−A)3 were connected by flexible linker of n-hexyl or n-dodecyl group (L2) to build the (D−π−A)3L2 configuration. The effect of both the auxiliary donors and linkers with different length of carbon chains upon the photophysical, electrochemical as well as photovoltaic properties of the (D−π−A)3L2 dyes were further investigated. Results reveal that the dyes PTZTB3−4 containing the auxiliary donor of 4-octyloxyphenyl group show a higher molar extinction coefficient, a broader IPCE response region, and a higher HOMO value than those of PTZTB1−2 and R−SB. Among all of the devices, the cells based on PTZTB2 and PTZTB4 exhibit a higher open circuit voltage due to that the charge recombination is blocked significantly by the n-dodecyl linkers. Meanwhile, a maximal power conversion efficiency of 6.66% is achieved by the device fabricated with PTZTB3. Besides, it is noteworthy that the (D−π−A)3L2 dyes possess a superior adsorbed stability on TiO2 interface than that of the reference dye as a result of the three anchors in a molecule of the former.

Published
2018

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