Chin. J. Org. Chem. ›› 2014, Vol. 34 ›› Issue (2): 340-348.DOI: 10.6023/cjoc201309006 Previous Articles     Next Articles



曹镇财, 何舟, 邓利军, 谭松庭   

  1. 湘潭大学化学学院 教育部环境友好化学与应用重点实验室 湘潭 411105
  • 收稿日期:2013-09-03 修回日期:2013-10-11 发布日期:2013-10-31
  • 通讯作者: 谭松庭
  • 基金资助:


Synthesis and Photovoltaic Properties of Two Dimensional Organic Dyes Containing Benzothiadiazole Unit

Cao Zhencai, He Zhou, Deng Lijun, Tan Songting   

  1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105
  • Received:2013-09-03 Revised:2013-10-11 Published:2013-10-31
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 51173154) and the Natural Science Foundation of Hunan Province (No. 13JJ2025).

By introducing the narrow band gap unit (dithiophene-benzothiadiazole) to the organic dye system, two novel organic dyes (DD2, DH2) with two-dimensional structures were designed and synthesized. The influence of dithiophene-ben- zothiadiazole unit acting as side chain or bridge group on the photophysical, electrochemical, and photovoltaic properties of the two dye-sensitizers was studied systematically. Two as-synthsized dyes with dithiophene-benzothiadiazole unit exhibited broad absorption spectra. Under one sun illumination (100 mW·cm-2, AM 1.5 G), DH2- and DD2-based dye-sensitized solar cells showed the power conversion efficiencies (PCE) of 1.67% and 3.26%, respectively. With optimization of co-adsorbent chenodeoxycholic acid (CDCA), DH2 exhibited a relatvely good anti-aggregation ability. Therefore, CDCA had a negligible effect on the PCE of DH2-based DSSCs. However, DD2 achieved an enhanced PCE of 5.53% after adding CDCA as co-adsorbent.

Key words: organic dyes, benzothiadiazole, synthesis, dye-sensitized solar cells