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Efficient Solar Cells Sensitized by Porphyrins with an Extended Conjugation Framework and a Carbazole Donor: From Molecular Design to Cosensitization
Author(s) -
Wang Yueqiang,
Chen Bin,
Wu Wenjun,
Li Xin,
Zhu Weihong,
Tian He,
Xie Yongshu
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201406190
Subject(s) - carbazole , porphyrin , dye sensitized solar cell , photochemistry , alkoxy group , chemistry , absorption (acoustics) , combinatorial chemistry , materials science , organic chemistry , alkyl , electrode , electrolyte , composite material
Porphyrin dyes containing the carbazole electron donor have been designed and optimized by wrapping the porphyrin framework, introducing an additional ethynylene bridge to extend the wavelength range of light absorption, and further suppression of the dye aggregation by introducing additional alkoxy chains. Application of a cosensitization approach results in improved current density ( J sc ) and open‐circuit voltage ( V oc ) values, thus achieving the highest cell efficiency of 10.45 %. This work provides an effective combined strategy of molecular design and cosensitization for developing efficient dye‐sensitized solar cells (DSSCs). In addition, carbazole has been demonstrated to be a promising donor for porphyrin sensitizers.