New Oxindole-Bridged Acceptors for Organic Sensitizers: Substitution and Performance Studies in Dye-Sensitized Solar Cells
Yogesh S. Tingare,
Chaochin Su,
Ming-Tai Shen,
Sheng-Han Tsai,
Shih-Yu Ho,
Wen-Ren Li
Affiliations
Yogesh S. Tingare
Institute of Organic and Polymeric Materials/Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Chaochin Su
Institute of Organic and Polymeric Materials/Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Ming-Tai Shen
Department of Chemistry, National Central University, Chung-Li 32001, Taiwan
Sheng-Han Tsai
Institute of Organic and Polymeric Materials/Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Shih-Yu Ho
Institute of Organic and Polymeric Materials/Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Wen-Ren Li
Department of Chemistry, National Central University, Chung-Li 32001, Taiwan
New D-π-A configured organic sensitizers featuring halogen-substituted oxindole-bridged acceptor units have been synthesized for dye-sensitized solar cells applications. Among fluorine, bromine, and iodine substitution, the cell based on bromine incorporated dye exhibited the highest efficiency. The oxindoles in these sensitizers were found to assist the electron injection through the chelation of their amide carbonyl groups to the TiO2 surface. This study provides an alternate approach for future rational dye design to gain excellent DSSC performance.
