Author : A. I. Onyia (Ph.D)

The effects of high temperature heat treatment on freshly grown zinc antimony sulphide thin films have been studied with the aim of improving the film electrical and optical properties. Such heat treatments were carried out less than 30 minutes after the ternary compound was co-deposited on plane glass substrates using a two-step chemical deposition technique of first growing binary ZnS and Sb2S3 separately and subsequently depositing one on top of the other to enable interfacial diffusion of atoms take place in the bi-layer stack that resulted in ternary zinc antimony sulphide, Zn1-xSbxS (0 < x < 1), of variable stoichiometry across the junction. Such films however exhibited low crystal order which however became significantly improved after annealing at temperature of 250 . The heat treatment also increased film optical transmittance from 31 to 71 decreased the absorption coefficient from 9.8x105 m-1 to 3.1x105m-1 and increased conductivity from 0.0014 Ω-1m-1 to 0.0016 Ω-1m-1 such that could render the films applicable in some optoelectronic technologies
Affiliation : Department of Industrial Physics, Enugu State University of Science and Technology, Enugu, Nigeria.
Keywords : Zinc antimony sulphide, Annealing, Optical propertie, Absorption coefficient.
Date : Thursday ,29 ,March ,2018

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