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Fluorenylvinylenes bridged triphenylamine-based dyes with enhanced performance in dye-sensitized solar cells
- Zhou, Huipeng, Xue, Pengchong, Zhang, Yuan, Zhao, Xin, Jia, Junhui, Zhang, Xiaofei, Liu, Xingliang, Lu, Ran
- Tetrahedron 2011 v.67 no.44 pp. 8477-8483
- chemical reactions, chemical structure, dyes, energy conversion, organic compounds, photovoltaic cells
- We have synthesized a series of new dipolar organic dyes Bn (n=0, 1, 2) employing triarylamine as the electron-donor, 2-cyanoacrylic acid as the electron-acceptor, and fluorenevinylene as the conjugated bridge, which were used as sensitizers in dye-sensitized solar cells. It is found that the solar-energy-to-electricity conversion efficiencies of the prepared DSSCs are in the range of 2.79–5.56%, which reach 35–70% of a standard device based on N719 fabricated and measured under the same conditions. The DSSC sensitized with B1 with balanced length of conjugated bridge shows the highest photo-to-electrical energy conversion efficiency and the open-circuit photovoltage (Vₒc) of 0.86 V.