Properties of the Cu/Pt bilayered counter electrode employed dye sensitized solar cells

Yun Young Noh, Oh Sung Song

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

In order to improve energy-conversion efficiency using a Cu/Pt bilayer on a flat-glass substrate of a counter electrode (CE), a 0.45 cm dye-sensitized solar-cell (DSSC) device (with glass/FTO/blocking layer/TiO2/N719 (dye)/electrolyte/50 nm-Pt/50 nm-Cu/glass) was prepared. For comparison, 100-nm thick Cu and Pt CEs were also prepared on flat-glass substrates using the same method. The photovoltaic properties of the DSSC device, such as short-circuit current-density (Jsc), open-circuit voltage (Voc), fill factor (FF), energy-conversion efficiency (ECE), and impedance, were checked using a solar simulator and potentiostat. The sheet resistance was examined using a four point probe. The phases of the bi-layered films were exa'miried using X-ray diffraction. The measured energy-conversion efficiency of the DSSC devices with only Pt and Cu/Pt bilayer counter electrodes was 4.60% and 5.72%, respectively. The sheet resistance and interface (CE/electrolyte) resistance of a Cu/Pt bilayer were smaller than those of a Pt-only layer. The phases of the Cu/Pt bi-layered films were identified in pure Cu and Pt without any intermetallic layer. We concluded that the increase in the efficiency of DSSCs employing Cu/Pt, resulted from employing the low-resistive Cu layer.

Original languageEnglish
Pages (from-to)557-560
Number of pages4
JournalJournal of Korean Institute of Metals and Materials
Volume52
Issue number7
DOIs
StatePublished - Jun 2014

Keywords

  • Bilayer
  • Optical properties
  • Solar cells
  • Solar simulator
  • Sputtering

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