Benner
رضية مهدي الجراح ( أستاذ مساعد )
كلية العلوم - الفيزياء
[email protected]
 
 
 
Investigation The Effect of Annealing Temperature and Zinc Concentration on The Optical Properties of ZnxCd1 – x S Thin Films
تحميل
بحث النوع:
علوم التخصص العام:
Dr. Radhyah Mahdi Shaker Jarrah اسم الناشر:
اسماء المساعدين:
Imperial Journal of Interdisciplinary Research (IJIR) الجهة الناشرة:
Vol-2, Issue-10, 2016 ISSN: 2454-1362,  
2016 سنة النشر:

الخلاصة

Abstract: The ZnxCd1-xS thin films prepared by chemical bath and deposited on glass substrates. A procedure to make optical quality thin films of ZnxCd1-xS has been investigated. Structural and optical properties of ZnxCd1-xS thin films with x = (0.2, 0.5 and 0.7) and T= (300, 423 and 473) K were synthesised-sized. The structural investigation indicates that they have polycrystalline structure. The crystalline size and degree of preferential orientation were found to be increased with the increase of Zn concentration (x) and annealing temperature. Optical data are recorded in the wavelength range 200-1000nm. In addition, the absorption coefficient is determined and correlated with the photon energy to estimate the band gap. Plots of (αhν)2 versus (hν) yield a straight line indicating direct transition occurs with optical band gap energies in the range) 3.3-3.5( EV. It is also found with increase annealing temperature and Zn content the band gap of the films increases. Refractive indices and extinction coefficients have been evaluated.