Chin. J. Org. Chem. ›› 2013, Vol. 33 ›› Issue (05): 1000-1004.DOI: 10.6023/cjoc201212029 Previous Articles     Next Articles

Articles

香豆素型染料敏化剂的合成及光电性能研究

韩亮, 周雪, 叶青, 李郁锦, 高建荣   

  1. 浙江工业大学化学工程与材料学院 杭州 310032
  • 收稿日期:2012-12-19 修回日期:2013-01-18 发布日期:2013-01-25
  • 通讯作者: 高建荣,hanliang814@163.com E-mail:hanliang814@163.com
  • 基金资助:

    国家自然科学基金(No. 21176223)和浙江省重点创新团队(No. 2010R50018-06)资助项目.

Synthesis and Photoelectric Properties of Coumarin Type Sensitizing Dyes

Han Liang, Zhou Xue, Ye Qing, Li Yujin, Gao Jianrong   

  1. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032
  • Received:2012-12-19 Revised:2013-01-18 Published:2013-01-25
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21176223) and the Key Innovation Team of Science and Technology in Zhejiang Province (No. 2010R50018-06).

Two novel coumarin type sensitizing dyes were synthesized with coumarin group bearing electron-donating group as donor, thiophene as π bridge and cyanoacetic acid as acceptor. Their spectral, electrochemical and photoelectric properties were evaluated. The results suggest that both dyes have the molecular orbital energy matched with the conduction band of TiO2 and the redox potential of the electrolyte I2/I-, which ensures the production of the current cycle in the cell. Compared with 2-cyano-3-[5-(7-methoxy-2-oxo-2H-chromen-3-yl)thiophen-2-yl]acrylic acid (IIIb) bearing methoxy group, sensitizing dye 2-cyano-3-[5-(7-diethylamino-2-oxo-2H-chromen-3-yl)thiophen-2-yl]acrylic acid (IIIa) bearing diethylamino group on C-7 of coumarin ring shows improved absorption of intramolecular charge transfer and the red shift of UV spectra. Dye sensitized solar cell (DSSC) based on IIIa has reduced back current and better IPCE (incident photo-to-current conversion efficient) and Jsc, which leads to improved photoelectric conversion efficiency (Jsc=8.68 mA/cm2, Voc=574 mV, η=3.52%).

Key words: coumarin, synthesis, sensitizing dyes, photoelectric properties