Efficient solar cells sensitized by porphyrins with an extended conjugation framework and a carbazole donor: from molecular design to cosensitization

Yueqiang Wang; Bin Chen; Wenjun Wu; Xin Li; Weihong Zhu; He Tian; Yongshu Xie

doi:10.1002/anie.201406190

Efficient solar cells sensitized by porphyrins with an extended conjugation framework and a carbazole donor: from molecular design to cosensitization

Angew Chem Int Ed Engl. 2014 Sep 26;53(40):10779-83. doi: 10.1002/anie.201406190. Epub 2014 Aug 11.

Authors

Yueqiang Wang¹, Bin Chen, Wenjun Wu, Xin Li, Weihong Zhu, He Tian, Yongshu Xie

Affiliation

¹ Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237 (P. R. China).

PMID: 25132108
DOI: 10.1002/anie.201406190

Abstract

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 (Jsc) and open-circuit voltage (Voc) 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.

Keywords: dyes/pigments; energy conversion; porphyrins; sensitizers; solar cells.