物理化学学报 >> 2010, Vol. 26 >> Issue (03): 578-582.doi: 10.3866/PKU.WHXB20100324

电化学 上一篇    下一篇

苯并噻唑碘的改进合成及其在染料敏化太阳电池中的应用

桃李, 杨燕珍, 史成武, 吴玉程, 吴小燕   

  1. 合肥工业大学化学工程学院, 合肥 230009; 中国科学院新型薄膜太阳电池重点实验室, 合肥 230031; 合肥工业大学材料科学与工程学院, 合肥 230009; 蚌埠市建设投资有限公司博士后工作站, 安徽 蚌埠 233000
  • 收稿日期:2009-09-28 修回日期:2009-12-17 发布日期:2010-03-03
  • 通讯作者: 史成武, 吴玉程 E-mail:shicw506@gmail.com; ycwu@hfut.edu.cn

Improved Preparation of Benzothiazolium Iodides and Their Application in Dye Sensitized Solar Cells

TAO Li, YANG Yan-Zhen, SHI Cheng-Wu, WU Yu-Cheng, WU Xiao-Yan   

  1. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China; Key Laboratory of Novel Thin FilmSolar Cells, Chinese Academy of Sciences, Hefei 230031, P. R. China; School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China; Postdoctoral Research Workstation, Bengbu Investment Group Co., Ltd., Bengbu 233000, Anhui Province, P. R. China
  • Received:2009-09-28 Revised:2009-12-17 Published:2010-03-03
  • Contact: SHI Cheng-Wu, WU Yu-Cheng E-mail:shicw506@gmail.com; ycwu@hfut.edu.cn

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摘要：

利用高压釜提高反应温度合成了3-甲基苯并噻唑碘(MBTI)和2,3-二甲基苯并噻唑碘(DMBTI), 研究了杂环上2位甲基对苯并噻唑碘的热稳定性和熔点的影响; 使用超微铂电极循环伏安法和电化学阻抗谱研究了苯并噻唑阳离子结构对I-3和I-的氧化还原行为及Pt电极/电解质界面的影响, 并组装成染料敏化太阳电池(DSCs). 结果表明: 该合成方法具有操作简便, 反应时间短, 产物提纯容易, 产率高的特点; DMBTI的熔点和热稳定性均高于MBTI; 当电解质组成为0.1 mol·L-1 I2, 0.1 mol·L-1 LiI, 0.6 mol·L-1 1-甲基-3-丙基咪唑碘(MPII), 0.3 mol·L-1 DMBTI, 溶剂为γ-丁内酯, 组装的DSCs的短路电流密度为16.91 mA·cm-2, 开路电压为0.65 V, 填充因子为0.57, 光电转换效率可达6.28%.

关键词: 染料敏化太阳电池, 苯并噻唑碘, 合成, 性能, 高压釜

Abstract:

We prepared 3-methyl benzothiazoliumiodide (MBTI) and 2,3-dimethyl benzothiazoliumiodide (DMBTI) by a quaternization reaction of benzothiazole/2-methyl benzothiazole and iodomethane using Teflon-lined, stainless steel autoclaves. The influence of the 2-position methyl group of the benzothiazolium heterocycle on the thermal stability and melting point of benzothiazolium iodides was studied by thermogravimetric analysis and differential scanning colorimetry. The relationship between I-3/I- redox behavior in solution and the Pt counter electrode/solution interface with the benzothiazolium structure was investigated by cyclic voltammetry using a Pt disk ultramicroelectrode and electrochemical impedance spectroscopy (EIS). Dye sensitized solar cells (DSCs) with MBTI and DMBTI were then assembled. The preparation of the benzothiazolium iodides is simple with short reaction time, easy purification, and high yields. Compared with MBTI, DMBTI has a higher melting point and excellent thermal stability. DSCs with an electrolyte solution composed of 0.1 mol·L-1 I2, 0.1 mol·L-1 LiI, 0.6 mol·L-1 1-methyl-3-propylimidazolium iodide (MPII), and 0.3 mol·L-1 DMBTI in γ-butyrolactone gave a short circuit photocurrent density of 16.91 mA·cm-2, an open circuit voltage of 0.65 V and a fill factor of 0.57. This corresponds to a photoelectric conversion efficiency of 6.28% at the illumination (air mass 1.5, 100 mW·cm-2).

Key words: Dye sensitized solar cell, Benzothiazoliumiodide, Preparation, Characteristic, Autoclave

MSC2000: 

  • O646