Promising efficiency enhancement in cobalt redox couple-based back-illuminated dye-sensitized solar cells with titanium foil substrate

Myoung Kim, Ho Gyeong Yun, Lee Woon Jang, Dae Woo Jeon, Man Gu Kang, Jeong Hun Yoon, Ju Mi Kim, Jong Hyeok Park, In Hwan Lee, Jeum Jong Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)


We demonstrate that a [Co(bpy)3]2+/3+ (PF6)2/3 redox couple is an effective strategy for cost-effective and highly efficient dye-sensitized solar cells (DSSCs). Their high transmittance and large complex size make cobalt redox couples advantageous in back-illuminated devices. Furthermore, the use of thin TiO2 films, together with the naturally formed blocking layer at the outermost surface of Ti substrate, effectively alleviate the drawbacks of cobalt electrolyte. By virtue of these simultaneous effects, we achieve a highly promising power conversion efficiency of 7.12%.

Original languageEnglish
Pages (from-to)32-37
Number of pages6
JournalJournal of Power Sources
Publication statusPublished - 2015 Mar 15


All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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