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Science China Chemistry

, Volume 58, Issue 4, pp 658–665 | Cite as

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

  • Dongdong Wang
  • Hua Dong
  • Xiaoyu Zhang
  • Yong Wu
  • Shaohua Shen
  • Bo Jiao
  • Zhaoxin Wu
  • Min Gao
  • Geng Wang
Articles

Abstract

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.

Keywords

dicyanovinyl group iridium complexes absorption response dye-sensitized solar cell 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • 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. 1.Department of Applied Chemistry, School of ScienceXi’an Jiaotong UniversityXi’AnChina
  2. 2.Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic and information EngineeringXi’An Jiaotong UniversityXi’AnChina
  3. 3.Key Laboratory for Advanced Materials, Institute of Fine Chemicals and Department of ChemistryEast China University of Science and TechnologyShanghaiChina
  4. 4.International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’AnChina

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