Synthesis and characterization of Mn composition effect on CdSe thin films

Abstract

Cadmium Selenide (CdSe) doped with (Mn) Manganese Chloride grown, on commercial glass substrate usingChemical Bath Deposition Method. Growth time was kept at 1-2 hours. Magnese Chloride (Mncl2) was used for dopant. CdMnSe films so obtained were characterized using X-Ray Diffraction, Scanning Electron Microscopy, EdAX, andUV-Visible spectrophotometer and photoluminescence studies respectively. XRD study confirms that CdSe films are polycrystalline in nature and have cubic structure. The Debye-Scherer formula was used to calculate average particle size of pure and doped CdSe film. Thus, the particle size was decrease on doping. The effect of doping concentration Mn on the luminescence spectra of CdSe was studied. The emission spectra revealed that the intensity increased considerably in the presence of dopant ions. It is clearly observed from the surface morphological studies by SEM that the as-deposited CdSe and doped Mn concentration films are nanocrystalline, homogenous, without cracks or holes and well covered to the glass substrate. FE-SEM images show spherical particles having uniform distribution. Roughness of the films were totally eliminated. EDAX patterns confirms the presence of Cadmium, Selenide and Magnese chloride elements (2%, 5%)in sample. Optical band gap of pure CdSe film comes out to be 2.1 eV.After doping energy band gap was decreasing. Copyright © 2017 VBRI Press.