Dicyanovinyl-unit-induced absorption enhancement of iridium(III) complexes in long-wavelength range and potential application in dye-sensitized solar cells

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• 作者：Dongdong Wang (1)
  Hua Dong (2)
  Xiaoyu Zhang (3)
  Yong Wu (1)
  Shaohua Shen (4)
  Bo Jiao (2)
  Zhaoxin Wu (2)
  Min Gao (1)
  Geng Wang (1)
  
  1. Department of Applied Chemistry ; School of Science ; Xi鈥檃n Jiaotong University ; Xi鈥橝n ; 710049 ; China
  2. Key Laboratory for Physical Electronics and Devices of the Ministry of Education ; School of Electronic and information Engineering ; Xi鈥橝n Jiaotong University ; Xi鈥橝n ; 710049 ; China
  3. Key Laboratory for Advanced Materials ; Institute of Fine Chemicals and Department of Chemistry ; East China University of Science and Technology ; Shanghai ; 200237 ; China
  4. International Research Center for Renewable Energy ; State Key Laboratory of Multiphase Flow in Power Engineering ; Xi鈥檃n Jiaotong University ; Xi鈥橝n ; 710049 ; China
  
• 关键词：dicyanovinyl group ; iridium complexes ; absorption response ; dye ; sensitized solar cell
• 刊名：SCIENCE CHINA Chemistry
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：58
• 期：4
• 页码：658-665
• 全文大小：1,165 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chinese Library of Science
  Chemistry
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1870

文摘

Iridium complexes with dicyanovinyl-grafted phenylpyridine/1-phenylisoquinoline as ligands are synthesized and their photophysical, electrochemical, and sensitization properties in DSSCs are investigated. The iridium complexes present significantly enhanced absorption from 400 to 525 nm. The 1-phenylisoquinoline-based iridium complex show bathochromic-shift emission in DMSO solution compared with their phenylpyridine-based counterpart, while their absorption response and photoluminescence peak in solid show little difference despite extension of the conjugated system. Using DSSCs, the conversion efficiency of 0.62% and open-circuit current of 1.4 mA/cm2 is achieved. The poor performance is attributed to the excited-state properties of iridium complexes according to the TD-DFT calculation.