Citation: Yang Xiao, Li Wei, Xu Fang, Wang Tianyang, Liu Dongzhi, Zhou Xueqin. Application of Charge Separation Dyes in Solid-State Dye Sensitized Solar Cells[J]. Chemistry, ;2019, 82(8): 737-742,748. shu

Application of Charge Separation Dyes in Solid-State Dye Sensitized Solar Cells

Yang Xiao ^1,2, ,
Li Wei ^1,2 ,
Xu Fang ^1,2 ,
Wang Tianyang ^1,2 ,
Liu Dongzhi ^1,2 ,
Zhou Xueqin ^1,2

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350;
2.
Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072

Received Date: 10 April 2019
Revised Date: 26 April 2019

The dyes as the particularly important material component of the dye sensitized solar cells (DSSC), carry out two functions:absorbing light energy and initiating the electrical current. And the dyes with long-lived charge-separated state can effectively improve electron injection efficiency, suppress charge recombination, and thereby improve device performance. All-solid-state dye-sensitized solar cells (ssDDSC) were fabricated using the charge separation (CS) dyes as photosensitizer and spiro-OMeTAD as hole-transport material. The effect of TiO₂ film thickness on the performance of ssDDSC was analyzed. When the TiO₂ film thickness was 1.2 μm, the device performance was optimal. The influence of dye structure on device performance was also discussed. The ssDSSC based on MTPABT-Pyc has the best performance, with photocurrent of 7.38 mA/cm² and efficiency of 3.06%. The dye MTPABT-Pyc had similar light-harvesting ability compared to the charge-transfer dye (CT type) MTPAcc, but its efficiency is 16% higher than to that of MTPAcc (2.64%). These results indicate that the charge-separated state of the CS-type dye has a superiority for the suppression of charge recombination and the transport of holes.
- Solid-state dye sensitized solar cells,
- Charge separation state,
- Charge recombination
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