Unsymmetric platinum(ii) bis(aryleneethynylene) complexes as photosensitizers for dye-sensitized solar cells

Feng Rong Dai, Yung Chung Chen, Lai Fan Lai, Wen Jun Wu, Chao Hua Cui, Gui Ping Tan, Xing Zhu Wang, Jiann T.Suen Lin, He Tian, Wai Yeung WONG*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Four new unsymmetric platinum(II) bis(aryleneethynylene) derivatives have been designed and synthesized, which showed good light-harvesting capabilities for application as photosensitizers in dye-sensitized solar cells (DSSCs). The absorption, electrochemical, time-dependent density functional theory (TD-DFT), impedance spectroscopic, and photovoltaic properties of these platinum(II)-based sensitizers have been fully characterized. The optical and TD-DFT studies show that the incorporation of a strongly electron-donating group significantly enhances the absorption abilities of the complexes. The maximum absorption wavelength of these four organometallic dyes can be tuned by various structural modifications of the triphenylamine and/or thiophene electron donor, improving the light absorption range up to 650nm. The photovoltaic performance of these dyes as photosensitizers in mesoporous TiO 2 solar cells was investigated, and a power conversion efficiency as high as 1.57% was achieved, with an open-circuit voltage of 0.59 V, short-circuit current density of 3.63 mA cm -2, and fill factor of 0.73 under simulated AM 1.5G solar illumination.

Original languageEnglish
Pages (from-to)1426-1434
Number of pages9
JournalChemistry - An Asian Journal
Volume7
Issue number6
DOIs
Publication statusPublished - Jun 2012

Scopus Subject Areas

  • Chemistry(all)
  • Biochemistry
  • Organic Chemistry

User-Defined Keywords

  • acetylide
  • dye-sensitized solar cells
  • photosensitizers
  • photovoltaics
  • platinum

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