The impact of pH on the structural, surface, electrical and optical properties of nanostructured PbSe thin films

tezel n., Tezel F. M., KARİPER I. A.

MATERIALS RESEARCH EXPRESS, vol.6, no.7, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 7
  • Publication Date: 2019
  • Doi Number: 10.1088/2053-1591/ab1675
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: thin film, surface tension, Zisman method, I-V measurement, optical band gap, pH effect, LEAD SELENIDE, DEPOSITION TIME, BAND-GAP, TEMPERATURE, GROWTH
  • Erciyes University Affiliated: Yes


This study involves PbSe deposits fabricated on glass substrates at different pH. Some optical properties of these deposits, including reflectance, extinction coefficient, refractive index, and dielectric constant were calculated by using absorbance values at room temperature with UV spectrophotometer according to wavelength. The surface properties and compositions were examined by SEM and EDX, respectively. Surface tensions were measured by Zisman Method, and obtained to be 39.0, 42.1, 43.1 and 39.1 mNm(-1) for pH: 8, 9, 10 and 11 values, respectively. The optical band gaps (Egap) were calculated as 2.17, 1.82, 1.77 and 2.27 eV for pH: 8, 9, 10 and 11, respectively. PbSe deposits' electrical resistivity was measured via four-point probe technique depending on deposits thicknesses, and they were found to be 65.27, 26.21, 39.87 and 36.03 Omega cm for pH: 8, 9, 10 and 11, respectively.