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Updated: Jul 18, 2025
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
A combination of fluorine-induced effect and co-sensitization for highly efficient and stable dye-sensitized solar
Shengbo Zhu1, Wei Li1, Bingyang Lu1
1Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices, Engineering Research Center of Light Stabilizers for Polymer Materials, Universities of Shaanxi Province, School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, China.
Abstract:
Developing dyes with high open-circuit photovoltage (Voc) is a vital strategy to improve the power conversion efficiency (PCE) of co-sensitized solar cells (co-DSSCs). Herein, three organic fluorine-containing dyes [YY-ThP(3F), YY-ThP(2F), and YY-ThP(26F)] are designed and synthesized for investigating the fluorine-induced effect on photophysical and photovoltaic performances. Consequently, this effect can significantly broaden the UV-vis absorption spectra of dyes but fail to improve the light-harvesting capability of DSSCs. Strikingly, YY-ThP(3F), featuring 3-position fluorine substitution to cyanoacrylic acid, yields a relatively high Voc compared to the corresponding fluorine-free dye (YY-ThP). Furthermore, the co-sensitization of YY-ThP+YY-ThP(3F) achieves a remarkably high PCE and long-term stability. This work implies that the combination of judicious molecular engineering and co-sensitization is a promising strategy for highly efficient and stable DSSCs.
