Citation: Fei Wu, Jian-Lin Liu, Lawrence Tien Lin Lee, Tao Chen, Min Wang, Lin-Na Zhu. Dye-sensitized solar cells based on functionalized truxene structure[J]. Chinese Chemical Letters, ;2015, 26(8): 955-962. doi: 10.1016/j.cclet.2015.03.008 shu

Dye-sensitized solar cells based on functionalized truxene structure

1.
a Faculty of Materials and Energy, Southwest University, Chongqing 400715, China;
2.
b Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

Corresponding author: Lin-Na Zhu,
Received Date: 9 January 2015
Available Online: 27 February 2015
Fund Project:

Three new metal-free organic dyes (TX1, TX2 and TX3) based on truxene core structure, with triphenylamine as the electron donor, thiophene as the p spacers, and cyanoacetic acid or rhodanine-3-acetic acid as the electron acceptor are designed and synthesized. Their UV-vis absorption spectra, electrochemical and photovoltaic properties were investigated. The cyanoacrylic acid is verified to be a better acceptor unit (meanwhile the anchoring group) compared to the rhodanine-3-acetic acid. And also, two anchoring groups in TX2 could provide stronger adsorption ability on the TiO₂ surface. In addition, the EIS results indicate a slower charge recombination processes for TX2. As a result, dye TX2 bearing two cyanoacetic acid outperforms the other two dyes, exhibiting the photo-conversion efficiency of 2.64%, with J_sc = 5.09 mA cm^-2, V_oc = 729 mV, FF = 71.1.
- Truxene,
- Dye-sensitized solar cell,
- Sensitizer,
- Photovoltaic properties
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沈阳化工大学材料科学与工程学院沈阳 110142