Structure and Physical Properties of 59B2O3–10Na2O–(30 − x)CdO–xZnO–1CuO (0 ≤ x ≤ 30) Glass System

A series of stable and transparent glasses with the composition 59B2O3–10Na2O–(30 − x)CdO–xZnO–1CuO (0 ≤ x ≤ 30) (where x = 0, 7.5, 15, 22.5, and 30 mol%) were prepared by conventional melt-quenching technique. These glasses were characterized using X-ray diffraction (XRD), Fourier-transform infrared (FTIR) and Raman spectroscopes, differential scanning calorimetry (DSC), optical absorption, and electron paramagnetic resonance (EPR). XRD and DSC analysis confirmed the glassy nature of the prepared samples. The physical properties such as density (ρ), molar volume (Vm), oxygen packing density (OPD), and the molar volume of oxygen (Vo) were calculated and discussed. FTIR and Raman studies showed that the glass network consists of BO3 and BO4 units in various borate groups. From DSC, it was found that the glass transition temperature (Tg) varies nonlinearly with the addition of ZnO content in place of CdO. Both EPR and optical absorption results have confirmed that the Cu2+ ions are in octahedral coordination with a strong tetrahedral distortion. The changes in various spectroscopic properties of Cu2+ ions in the glasses such as spin-Hamiltonian parameters ( ) and bonding coefficients (α2, β12, and β2) were understood with the help of FTIR and Raman studies

Influence of substrate temperature on structure, morphology and optical properties of spray deposited ZnO thin films

In present article ZnO thin films were deposited for five different substrate temperatures (150-350 oC) using simple spray technique. The deposited films have been characterized using X-ray diffractometer (XRD), Scanning Electron Microscope (SEM) and UV-Visible spectroscopy and effect of substrate temperature on structure, morphology, and optical properties have been studied. Crystallite size was estimated from using Lorentz Fit of XRD data. The crystallite size was in the 20 to 26.32 nm range.  The SEM of (ZnO 300 ) film sample shows whole surface was uniformly coated with schematically arranged network of ZnO wires of average diameter 566 nm. Purity of the deposited sample was investigated by using Energ Dispersive X-ray Analysis (EDX).  All the ZnO films exhibit 70 to 80% transmittance and 3.23 to 3.26 eV optical band gap.&nbsp

Study of Effect of Substrate Temperature on Structure, Morphology and optical Properties of Spray Deposited Cu2ZnSnS4 Nano Thin films.

Cu2ZnSnS4 (CZTS) films for different substrate temperatures were deposited by using simple chemical spray technique. Analytical reagent Grade; Copper chloride (CuCl2), Zinc chloride (ZnCl2), Tin chloride (SnCl4.5H2O) and thiourea (SC(NH2)2) were used as  Cu+,  Zn+, and  Sn+ and  ion sources respectively. A set of five CZTS films was deposited using five different substrate temperatures (175, 200, 250, 275, and 300 ).  The structure, Morphology, Elemental analysis and optical properties of these films were studied using X-ray diffratometer (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDX) and UV-Visible spectroscopy techniques respectively. The XRD spectra showed that all films are polycrystalline and exhibit kesterite tetragonal crystal structure with preferential orientation along (112) direction. The crstallinity was found increased with substrate temperature. The calculated crystallite size was increased with increase in substrate temperature. The surface morphology of CZTS films was improved with increase in substrate temperature. The film sample deposited for 275   represent excellent spherical granules CZTS crystals of increasing size from 640 nm to 1.8 μm arranged in regular fashion with some void spaces. The purity of the composition was investigated using Elemental analysis of the deposited films. The optical band gap was estimated using Tauc plots. The band gap obtained was to be in the range of 1.4 to 1.6 eV