Low-cost and eco-friendly nebulizer spray coated CuInAlS2 counter electrode for dye-sensitized solar cells

C. Ravi Dhas, A. Jennifer Christy, R. Venkatesh, Esther Santhoshi Monica S., Subhendu K. Panda, B. Subramanian, K. Ravichandran, P. Sudhagar, A. Moses Ezhil Raj

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

CuInAlS2 thin films for different substrate temperatures were deposited by a novel nebulizer spray technique. The polycrystalline CIAS thin film exhibited tetragonal structure with the preferential orientation of (1 1 2) plane. Nanoflakes were observed from the surface morphology of CIAS film. The peak position of core level spectra confirms the presence of CuInAlS2 from XPS analysis. The absorbance spectra and optical band gap were observed from the optical property. The activation energy, carrier concentration, hole mobility and resistivity were determined by linear four probe and Hall effect measurements. The CIAS film was used as a counter electrode (CE) in dye-sensitized solar cells (DSSCs) and is characterized by cyclic voltammetry, electrochemical impedance spectroscopy and Tafel measurements. DSSC fabricated with the CIAS CE achieved the photo conversion efficiency of about 2.55%.

Original languageEnglish
Pages (from-to)23-32
Number of pages10
JournalPhysica B: Condensed Matter
Volume537
Early online date2 Feb 2018
DOIs
Publication statusPublished - 15 May 2018

Keywords

  • CIAS
  • Counter electrode
  • Dye-sensitized solar cells
  • Nebulizer spray
  • XPS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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