Photoconductivity and photoluminescence in chemically deposited films of (Cd0.95-Pb0.05)S: CdCl2,Ce

Abstract

The results of photoconductivity (PC), photoluminescence (PL), optical absorption spectra, XRD and SEM studies are presented for (Cd 0.95 -Pb 0.05 )S : CdCl 2 ,Ce films prepared by chemical bath deposition technique. PC gains ~10 7 are found in doped films. PL emission spectrum is found in red region which is related to 5d to 4f transition in Ce. Films prepared at 60°C show better PC while those prepared at room temperature (RT) show better PL. Optical absorption studies show reduction in band gap due to addition of PbS. A peak due to Ce is also observed in absorption spectrum. XRD studies show the presence of both CdS and PbS. SEM studies show presence of microcrystals, cluster of grains along with some rod type structures.

Comparison of N-doped ZnO and N–Al codoped ZnO thin films deposited by pulsed filtered cathodic vacuum arc deposition

“…For preparation of films, many techniques have been used including vapor cooling condensation method [18], magnetron sputtering [3,13], chemical bath deposition [19], metal organic chemical vapour deposition (MOCVD) [20], spray pyrolysis [21], plasma-assisted molecular beam epitaxy (PA-MBE) [22,23], reactive electron beam (ebeam) evaporation system [24], dielectric barrier discharged pulsed laser deposition (DBD-PLD) [25], filtered vacuum (cathodic) arc deposition (FVAD, FCVD) [26,27], spin coating method [14], sputtering [15] etc. Pulsed filtered cathodic vacuum arc deposition (PFCVAD) is a common technique to prepare oxide and removal of macroparticles in arc evaporation.…”

Effect of annealing and composition on crystal structure, surface morphology and optical absorption of chemically deposited Cd1‐xSnxS films

“…The structural parameters such as crystallinity, crystal phase, lattice constant, grain size etc. are strongly dependent on the deposition conditions [7]. A crystal structure and symmetry play important roles in determining many of its properties, such as cleavage, electronic band structure, and optical properties.…”