Solvent volume dependent physical properties and electrocatalytic ability of nebulizer spray deposited CuInGaS2 counter electrode for dye-sensitized solar cells

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

CuInGaS2 (CIGS) thin films were coated using nebulizer spray technique for different solvent volumes (10, 30, 50 and 70 ml) at the substrate temperature of 350 °C. The structural, optical and electrical properties were studied for the prepared CIGS thin films. CIGS thin films exhibited tetragonal structure and the maximum crystallite size was calculated for the film deposited using 50 ml solvent volume. The surface morphology of CIGS thin films was analyzed from scanning electron microscopy and atomic force microscopy studies. The electrical parameters of CIGS thin films such as resistivity, carrier concentration and mobility were examined using four probe method and Hall measurements. Electrocatalytic activities of the CIGS films towards redox couple (I/I3) were analyzed by cyclic voltammograms, electrochemical impedance spectroscopy, and Tafel polarization measurements. The high photocurrent efficiency was obtained for the CIGS counter electrode prepared using 50 ml solvent volume.

Original languageEnglish
Pages (from-to)73-81
Number of pages9
JournalThin Solid Films
Volume653
Early online date6 Mar 2018
DOIs
Publication statusPublished - 1 May 2018

Keywords

  • Copper indium gallium sulfide
  • Counter electrode
  • Dye-sensitized solar cells
  • Nebulizer spray
  • Thickness

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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