Ruthenium core-activated platinum monolayer shell high redox activity cathodic electrocatalysts for dye-sensitized solar cells

Tsan Yao Chen, Yu Ting Liu, Ha M. Nguyen, Liang Jen Fan, Chiun Yi Wu, Tzy Jiun Mark Luo, Chih Hao Lee, Yaw Wen Yang, Ten Chin Wen, Tsang Lang Lin

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10 Citations (Scopus)

Abstract

Here, we have combined the understanding of density functional theory in relation with lattice strain-to-activity correlation to design a Ru core-Ptshell structured electrocatalyst in a dye-sensitized solar cell (DSC) cathode. This electrocatalyst possesses a compressive lattice strain in the shell region which translocates the Pt valence charge to neighboring atoms to decrease the Pt valence band density of states and thus lower the Pt d-band levels. Consequently, compared with DSCs using Pt nanoparticles (NPs) cathode, the Rucore-Ptshell NPs improves the triiodide to iodide redox reduction activity by 2.11-fold and thus boosts the photovoltaic efficiency of DSCs by ∼30.4%. These results provide mechanistic information for the development of DSCs with reduced Pt utilization and programmable electrochemical performance.

Original languageEnglish
Pages (from-to)5660-5669
Number of pages10
JournalJournal of Materials Chemistry A
Volume1
Issue number18
DOIs
Publication statusPublished - 2013 May 14

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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    Chen, T. Y., Liu, Y. T., Nguyen, H. M., Fan, L. J., Wu, C. Y., Mark Luo, T. J., Lee, C. H., Yang, Y. W., Wen, T. C., & Lin, T. L. (2013). Ruthenium core-activated platinum monolayer shell high redox activity cathodic electrocatalysts for dye-sensitized solar cells. Journal of Materials Chemistry A, 1(18), 5660-5669. https://doi.org/10.1039/c3ta01547e