影像科学与光化学 ›› 2010, Vol. 28 ›› Issue (2): 137-146.DOI: 10.7517/j.issn.1674-0475.2010.02.137

• 研究简报 • 上一篇    下一篇

新型含有多氰基受体单元的近红外敏化染料的合成及其光伏性能研究

何立1,3, 刘博1,2, 陈宇1, 朱为宏1   

  1. 1. 华东理工大学, 精细化工研究所, 结构可控先进功能材料及其制备教育部重点实验室, 上海200237;
    2. 河北师范大学, 化学与材料科学学院, 河北, 石家庄, 050016;
    3. 浙江省上虞市环境保护局, 浙江, 上虞, 312300
  • 收稿日期:2009-12-15 修回日期:2010-01-12 出版日期:2010-03-23 发布日期:2010-03-23
  • 通讯作者: 刘博,liubo@mail.hebtu.edu.cn;朱为宏,whzhu@ecust.edu.cn.
  • 基金资助:
    国家自然科学基金(20672036);高等学校博士学科点专项科研基金(SRFDP200802510011)

Synthesis and Photovoltaic Performances of Dye-sensitized Solar Cells Based on Novel NIR Dyes Containing Multi-cyano Acceptor

HE Li1,3, LIU Bo1,2, CHEN Yu1, ZHU Wei-hong1   

  1. 1. Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, P. R. China;
    2. College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016, Hebei, P. R. China;
    3. Zhejiang Shangyu Environmental Protection Agency, Shangyu 312300, Zhejiang, P. R. China
  • Received:2009-12-15 Revised:2010-01-12 Online:2010-03-23 Published:2010-03-23

摘要: 本文分别以三苯胺、二甲基苯胺和吲哚啉单元为电子给体,设计并合成了3个新型D-π-A体系近红外敏化染料分子5C-1、5C-2和5C-3,并对其结构进行了表征,详细研究了在溶液中以及吸附到电极上的吸收光谱.该系列敏化染料在550—850 nm之间具有较强的吸收,尤其5C-3的吸收边带已达到954 nm.当该系列敏化染料吸附到TiO2上时,吸收边带大幅红移,显示有利于染料捕获长波段区域的太阳光.通过循环伏安法,测定了染料的电化学性质,发现该系列敏化染料的最低未占有轨道(LUMO)能级与TiO2导带并不匹配,因此选用导带能级更正的SnO2作为阳极半导体材料进一步测试了该系列染料的光电性能,以发展具有优良性能的长波段响应的近红外敏化剂.

关键词: 近红外, 染料敏化太阳能电池, 敏化剂, SnO2

Abstract: A series of novel NIR dyes 5C-1,5C-2 and 5C-3 containing triphenylamine,dimethylphenylamine and indoline unit as electron donors were synthesized and characterized.Their photophysical and electrochemical properties were studied in detail.All of three dyes have strong absorption in visible and NIR region from 550 to 850 nm.While adsorbed on TiO2,absorption peaks become broadened with red-shift in their absorption edges,which are favored to capture light in NIR region.However,LUMO levels of these NIR dyes are above-0.1 V vs NHE,incapable of matching the conduction band of TiO2(-0.5 V vs NHE).Therefore,SnO2 was utilized as anodic semiconductor materials instead of TiO2.The short-circuit current density was sharply increased,indicating that using a suitable semiconductor material could improve light-generated current effectively.The photovoltaic performance of DSSCs based on three dyes could be further improved after optimizing the semiconductor materials and the electrolyte.

Key words: NIR, dye-sensitized solar cells, sensitizer, SnO2

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