Investigation On The Influence of Varying Substrate Temperature On The Physical Features of Yttrium Doped Cadmium Selenide Thin Films Materials

International Journal of Applied Physics

© 2021 by SSRG - IJAP Journal

Volume 8 Issue 2

Year of Publication : 2021

Authors : Nwamaka I. Akpu, Asiegbu A.D, Nnanna L.A, Imosobomeh L. Ikhioya

10.14445/23500301/IJAP-V8I2P106

How to Cite?

Nwamaka I. Akpu, Asiegbu A.D, Nnanna L.A, Imosobomeh L. Ikhioya, "Investigation On The Influence of Varying Substrate Temperature On The Physical Features of Yttrium Doped Cadmium Selenide Thin Films Materials," SSRG International Journal of Applied Physics, vol. 8,  no. 2, pp. 37-46, 2021. Crossref, https://doi.org/10.14445/23500301/IJAP-V8I2P106

Abstract:

The influence of varying substrate temperature on the structural, morphological, optical, and electrical properties of yttrium doped CdSe using the spray pyrolysis deposition method is reported in this work. The synthesized thin materials were characterized using X-ray diffraction-XRD, Scanning electron microscopy (SEM), Energy dispersive X-Ray (EDX), UV-Spectrophotometer, and Four-point probe. The XRD analysis revealed a polycrystalline hexagonal structure with the most preferred orientation along (100) plane for all the films irrespective of the substrate temperature. Y: CdSe deposited at 160oC gave the best crystallinity. The surface morphology ascertained using SEM shows uniform, well dense, and agglomerated films. The as-deposited films were homogenous devoid of cracks suggesting uniform deposition. The EDX results show the presence of the major elements i.e. Cd, Se, and Y which confirms the formation of CdSe and novel YCdSe thin particles. The optical results reveal that Y: CdSe deposited at 180oC exhibited better optical property when compared to other films with an energy bandgap value of 1.50eV. The electrical studies show that an increase in substrate temperature of the thin material decreases the resistivity with increasing thickness and increasing conductivity which reveals that the films are semiconducting material good for use in electronic and optoelectronic applications and more so for photovoltaic applications due to the narrowed bandgap.

Keywords:

Y- doped CdSe, substrate temperature, XRD, SEM, bandgap, optoelectronics

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