高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (9): 1669-1677.doi: 10.7503/cjcu20160302

• 物理化学 • 上一篇    下一篇

敏化染料分子长径比对太阳能电池性能的影响

任思遥1,2,3, 周雪琴1,2,3, 刘东志1,2,3, 蒋克键4, 李巍1,2,3, 王丽昌1,2, 汪天洋1,2,3()   

  1. 1. 天津大学化工学院, 天津 300350
    2. 天津化学化工协同创新中心, 天津 300350
    3. 天津市功能精细化学品技术工程中心, 天津 300350
    4. 中国科学院化学研究所绿色印刷实验室, 北京 100190
  • 收稿日期:2016-04-29 出版日期:2016-09-10 发布日期:2016-08-26
  • 作者简介:联系人简介: 汪天洋, 男, 博士, 讲师, 主要从事有机光电材料合成及性能研究. E-mail:wtywtywty1988@126.com
  • 基金资助:
    国家自然科学基金(批准号: 21576195, 21506151)和天津市科技创新平台计划项目(批准号: 14TXGCCX0001)资助

Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells

REN Siyao1,2,3, ZHOU Xueqin1,2,3, LIU Dongzhi1,2,3, JIANG Kejian4, LI Wei1,2,3, WANG Lichang1,2, WANG Tianyang1,2,3,*()   

  1. 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
    2. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300350, China
    3. Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300350, China
    4. Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2016-04-29 Online:2016-09-10 Published:2016-08-26
  • Contact: WANG Tianyang E-mail:wtywtywty1988@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21576195, 21506151) and the Tianjin Science and Technology Innovation Platform Program, China(No.14TXGCCX0001)

摘要:

采用同一系列但分子长径比不同的3种染料: 2-氰基-3-[2-[4-{2-[4-N,N-二(4-甲基苯基)氨基苯基]乙烯基}-苯基氨基)-嘧啶-5-取代基]-丙烯酸(MTPA-Pyc)、 2-氰基-3-(4-{2-[4-N,N-二(4-甲基苯基)氨基苯基]乙烯基}-苯基)-丙烯酸(MTPAcc)和2-氰基-3-[4-N,N-二(4-甲基苯基)氨基苯基]-丙烯酸(MTPAc), 研究了在不同吸附溶剂中3种染料分子在TiO2上的吸附量和聚集态, 探讨了敏化染料分子长径比对染料敏化太阳电池性能的影响. 结果表明, MTPAcc具有最合适的分子长径比, 其在TiO2表面的吸附量及应用的光电性能最高; 吸附溶剂的极性增大有利于提高染料的吸附量, 但也会影响染料分子的聚集态. 当以四氢呋喃为吸附溶剂时, MTPAcc在TiO2表面的吸附量大且不发生聚集, 对应的敏化太阳能电池器件在所有结果中表现最好, 在490 nm处的单色光光电转化效率(IPCE)极值达到84%, 总光电转化效率(η)达到5.72%.

关键词: 染料敏化太阳能电池, 长径比, 吸附量, 聚集态

Abstract:

Three dyes, 2-cyano-3-[2-(4-{2-[4-N,N-bis(4-methylphenyl)aminophenyl]vinyl}-phenylamino)-pyrimidin-5-yl]-acrylic acid(MTPA-Pyc), 2-cyano-3-(4-{2-[4-N,N-bis(4-methylphenyl)aminophenyl]vinyl}-phenyl)-acrylic acid(MTPAcc), and 2-cyano-3-[4-N,N-bis(4-methylphenyl)aminophenyl]-acrylic acid(MTPAc), that have different aspect ratios were studied for their performances as sensitizer in a dye sensitized solar cell(DSSC). The effects of solvent, the amount of dye molecules adsorbed on the surface of TiO2, and dye aggregation were investigated. The results show that MTPAcc has the most suitable aspect ratio among the three dyes with the highest and best photovoltaic properties. Polariry of absorption solvents can influence not only the absorbed amount of dyes at TiO2 but also the dye aggregation. MTPA-Pyc with a large aspect ratio exists in H-aggregation in tolene and tetrahydrofuran, whereas J-aggregation in acetonitrile. MTPAcc was found with high absorption amount at TiO2 but without aggregation, resulting in the best photovoltaic properties of corresponding DSSC with the incident photon-to-current efficiency(IPCE) of 84% at 490 nm and the photoelectric conversion efficiency(η) of 5.72%. Therefore, the aspect ratio of dye sensitizers is significant for the photovoltaic properties of DSSC.

Key words: Dye sensitized solar cell, Aspect ratio, Absorbed amount, Aggregation

中图分类号: