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Chinese Journal of Organic Chemistry >

2013 , Vol. 33 >Issue 05: 1000 - 1004

DOI: https://doi.org/10.6023/cjoc201212029

Articles

Synthesis and Photoelectric Properties of Coumarin Type Sensitizing Dyes

  • Han Liang ,
  • Zhou Xue ,
  • Ye Qing ,
  • Li Yujin ,
  • Gao Jianrong
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  • College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032

Received date: 2012-12-19

  Revised date: 2013-01-18

  Online 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).

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Abstract

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

Cite this article

Han Liang , Zhou Xue , Ye Qing , Li Yujin , Gao Jianrong . Synthesis and Photoelectric Properties of Coumarin Type Sensitizing Dyes[J]. Chinese Journal of Organic Chemistry, 2013 , 33(05) : 1000 -1004 . DOI: 10.6023/cjoc201212029

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