Branched dibenzofulvene-based organic dyes for dye-sensitized solar cells under one sun and dim light

  • Yung-Chung ChenEmail author
  • Guan-Wei Huang
  • Yuan-Jay ChangEmail author
  • Jun-Jie Wen


Series of metal-free dyes (OMS4-7) featuring a dibenzofulvene connected with thienyl or furanyl as conjugation bridge, T-shaped diarylamines (diphenylamine or phenyl-1-naphthylamine) as donors and different numbers of cyanoacrylic acid as anchors have been synthesized and applied into dye-sensitized solar cells (DSSCs). The efects of different donors, conjuation segments and number of anchors on optical and photovoltaic properties were investigated through photophysics, electrochemical and photovoltaic measurements. Of the DSSCs, the structure contains mono anchor with thienyl dibenzofulvene linked to diphenylamine, i.e. OMS4-based device exhibited the highest power conversion efficiency (PCE) of 2.42%, a value of Jsc of 6.01 mA cm−2, a Voc of 0.63 V, and a fill factor of 0.63 under 10 mM CDA co-adsorbent and AM 1.5 irradiation. The corresponding device was also conducted with respect to different light intensity such as D65, CWF and TL84. As a result, the cell performance based on TL84 with 2500 lx exhibited the best PCE of 8.78%.



Financial support from the Ministry of Science and Technology (Grant Nos. MOST 106-2221-E-151-046 -MY2 and MOST 106-2113-M-029-001) Taiwan ROC is gratefully acknowledged.

Supplementary material

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Supplementary material 1 (DOC 27321 kb)


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Authors and Affiliations

  1. 1.Department of Chemical and Materials EngineeringNational Kaohsiung University of Science and TechnologyKaohsiung CityTaiwan, ROC
  2. 2.Photo-SMART (Photo-sensitive Material Advanced Research and Technology Center)National Kaohsiung University of Science and TechnologyKaohsiung CityTaiwan, ROC
  3. 3.Department of ChemistryTunghai UniversityTaichungTaiwan, ROC

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