有机化学 ›› 2014, Vol. 34 ›› Issue (2): 340-348.DOI: 10.6023/cjoc201309006 上一篇    下一篇

研究论文

含苯并噻二唑的二维有机染料的合成与光伏性能研究

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 E-mail:tanst2008@163.com
  • 基金资助:

    国家自然科学基金(No.51173154)和湖南省自然科学基金(No.13JJ2025)资助项目.

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).

通过引入烷基二噻吩苯并噻二唑窄带隙基元到D-π-A有机染料体系中,设计并合成了两种二维结构的有机染料DD2DH2,系统地研究了以烷基二噻吩苯并噻二唑基元作为侧基或桥联基元对染料敏化剂的光物理性能、电化学性能和光伏性能的影响. 含有烷基二噻吩苯并噻二唑基元的这两种染料都具有较宽的吸收光谱. 在氙灯光源(100 mW·cm-2,AM 1.5 G)下,基于有机染料DH2DD2的染料敏化太阳能电池的能量转换效率分别为1.67%和3.26%. 采用鹅去氧胆酸(CDCA)共吸附剂优化后,染料DH2表现出较好的抗聚集能力,能量转换效率几乎没有变化;而DD2的能量转换效率提高到了5.53%.

关键词: 有机染料, 苯并噻二唑, 合成, 染料敏化太阳能电池

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