高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (7): 2254.doi: 10.7503/cjcu20200805

• 研究论文 • 上一篇    下一篇

非平衡溶剂化新理论在有机染料电子光谱中的应用

苏英立, 任海生(), 李象远   

  1. 四川大学化学工程学院, 空天动力燃烧与冷却教育部工程研究中心, 成都 610065
  • 收稿日期:2020-11-11 出版日期:2021-07-10 发布日期:2021-01-14
  • 通讯作者: 任海生 E-mail:renhs@scu.edu.cn
  • 基金资助:
    国家自然科学基金(21903057)

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)

摘要:

总结了非平衡溶剂化新理论和在量子化学软件Q-Chem中基于含时密度泛函理论(TD-DFT)实现溶剂效应下计算电子吸收和发射光谱的数值解方法. 采用该方法计算了染料敏化太阳能电池(DSSCs)中三苯胺型有机染料TPA??CH=CH??CA(n=0~4)在真空和乙腈溶剂中的电子结构与光谱性质, 研究发现, π共轭桥上碳碳双键的个数和溶剂效应会促进光电转换.

关键词: 非平衡溶剂化, 有机染料, 电子光谱, 染料敏化太阳能电池

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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