Electrochemical approaches for rearrangement of lead sulfide thin films prepared by SILAR method


Çaʇri Üst Ü., DAĞCI KIRANŞAN K., ALANYALIOĞLU M.

Materials Science in Semiconductor Processing, vol.41, pp.270-276, 2016 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 41
  • Publication Date: 2016
  • Doi Number: 10.1016/j.mssp.2015.09.019
  • Journal Name: Materials Science in Semiconductor Processing
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.270-276
  • Keywords: Chalcogenides, Crystal structure, Electrochemistry, Semiconductors, Thin films
  • Bilecik Şeyh Edebali University Affiliated: No

Abstract

Potentiostatic and potentiodynamic approaches have been performed for rearrangement of lead sulfide thin films prepared by a successive ionic layer adsorption and desorption technique on Au electrodes. Potentiostatic processes have been applied by potential-controlled electrolyses at -450 mV and potentiodynamic applications have been performed by cyclic voltammetry scanning potential between -800 and 50 mV on lead sulfide modified Au electrodes in pH 5.9 solution. These potential values have been determined by considering underpotential deposition of both lead and sulfur as a result of cyclic voltammetry experiments of lead sulfide modified Au working electrodes. Scanning electron microscopy, scanning tunneling microscopy, and powder X-ray diffraction results show that electrochemical approaches cause a transformation from amorphous to polycrystalline structure for PbS thin films. UV-visible-near infrared spectroscopy investigation of the samples reveals that the optical properties of lead sulfide thin films are protected after electrochemical processes.