Browsing Gold Collection by Author "Wafula, Henry"

Now showing items 1-3 of 3

    • Meyer-Neldel rule for Cu (I) diffusion in In2S3 layers 

      Juma, Albert; Wafula, Henry; Wendler, Elke; Dittrich, Thomas (Journal of Applied Physics, 2014-02-03)
      The nature of barriers for atomic transport in In2S3 layers has been varied by addition of chlorine. Diffusion of Cu(I) from a removable CuSCN source was used to probe the variation of the barriers. The Meyer-Neldel ...

    • Role of Cl on Diffusion of Cu in In2S3 Layers Prepared by Ion Layer Gas Reaction Method 

      Wafula, Henry; Robinson, Musembi; Juma, Albert; Sakwa, Thomas; e Kitui, Manass; Araoz, Rodrigo; Fischer, Christian-H. (coatings, 2015-02-15)
      Ion layer gas reaction (ILGAR) method allows for deposition of Cl-containing and Cl-free In2S3 layers from InCl3 and In(OCCH3CHOCCH3)3 precursor salts, respectively. A comparative study was performed to investigate the ...

    • A Surface Photovoltage Study of Surface Defects on Co-Doped TiO2 Thin Films Deposited by Spray Pyrolysis 

      Wafula, Henry; Juma, Albert; Sakwa, Thomas; Musembi, Robinson; Simiyu, Justus (MDPI, 2016-07-22)
      Surface photovoltage (SPV) spectroscopy is a powerful tool for studying electronic defects on semiconductor surfaces, at interfaces, and in bulk for a wide range of materials. Undoped and Cobalt-doped TiO2 (CTO) thin films ...