Influences of lead and magnesium co-doping on the nanostructural, optical properties and wettability of spin coated zinc oxide films. (November 2015)

• Record Type: Journal Article
• Authors: Shaban, Mohamed; El Sayed, A.M.
• Is Part Of: Materials science in semiconductor processing. Volume 39(2015:Nov.)
• Page Start: 136
• Page End: 147
• Publication Date: 2015-11
• Subjects: Co-doping -- ZnO films -- Wettability -- Wrinkle structure -- Optical constant -- Refractive index; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2015.04.008
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: The quality and optical homogeneity of thin films are necessary for optoelectronic devices and semiconductor technology. The influence of Pb doping, Zn1− x Pb x O (0≤ x ≤0.05), and Mg co-doping, Zn0.95− y Pb0.05 Mg y O (0≤ y ≤0.05), on the microstructural properties, optical parameters and wettability of ZnO films were investigated. X-ray diffraction (XRD) and field emission-scanning electron microscopy (FE-SEM) results show that the films have polycrystalline and hexagonal structure with a preferred (002) orientation combined with wrinkle network structure for the Pb doped films. The crystalline quality is slightly enhanced with the Pb doping and then deteriorated after Mg co-doping. The influences of the crystallinity and chemical composition on the film wettability are studied. All films show transparency between 85–93%. The reflectance and optical band gap of ZnO films decrease for Pb doping and then increase with Mg co-doping. Well-known Swanepoel׳s method is employed to determine the refractive index ( n ) and film thickness ( d ). The influences of Pb and Mg co-doping on the Urbach energy and optical dispersion parameters are also discussed.