Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (7): 2254.doi: 10.7503/cjcu20200805

• Article • Previous Articles     Next Articles

Application of New Nonequilibrium Solvation Theory in Electronic Spectra of Organic Dyes

SU Yingli, REN Haisheng(), LI Xiangyuan   

  1. Engineering Research Center of Combustion and Cooling for Aerospace Power,Ministry of Education,College of Chemical Engineering,Sichuan University,Chengdu 610065,China
  • Received:2020-11-11 Online:2021-07-10 Published:2021-01-14
  • Contact: REN Haisheng E-mail:renhs@scu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21903057)

Abstract:

Dye sensitized solar cells(DSSCs) are the new-type photovoltaic devices with the advantages of low cost, easy manufacture and environmental friendliness. Solvation can improve the photoelectric conversion efficiency of DSSCs through changing the electronic structures and spectroscopic properties of organic dyes. The novel nonequilibrium solvation theory and the numerical solutions for calculating the electronic absorption and emission spectra in solution based on time-dependent density functional theory(TD-DFT) in the quantum chemistry software Q-Chem were summarized. Then, the electronic structures and spectral properties of orga-nic dyes TPA??CH=CH??CA(n=0—4) in gas phase and acetonitrile solvent were calculated by this method. It was found that the number of ??CH=CH?? in π-conjugated bridge and the solvent effects are able to improve the photoelectric conversion efficiency. This study will provide new ideas on the design of organic dye molecules in DSSCs.

Key words: Nonequilibrium solvation, Organic dye, Electronic spectrum, Dye sensitized solar cells(DSSCs)

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