Abstract :
Abstract Lead sulfide (PbS) thin films have been deposited onto glass and polymide (PI) substrates at 300 0C with chemical spray pyrolysis (CSP) technique. Effects of substrate types on the structural properties of the films were studied. Sets of experiments were conducted to optimize the deposition of PbS films with appropriate deposition parameters. To evaluate the melting point temperature of a PI substrate, thermal studies were performed using a Differential scanning calorimeter. The deposited films were analyzed with X-ray diffraction, energy dispersive X-ray and atomic force microscopy to determine their structural properties. DSC measurement confirmed that the PI material has a glass transition temperature (Tg) of approximately 311°C and has no melting peak. X-ray diffraction patterns reveal that the films exhibit the cubic rock salt (NaCl) type structure. PI substrate exhibited the larger roughness than that for the glass because of large particles adsorbed on the PI substrate.
Keyword :
Keywords: Lead Sulfide, Chemical Spray Pyrolysis, Thin Film on Substrate