Investigation of Te doped ZnO synthesized by Sol-Gel technique

Authors : Eyüp Fahri KESKENLER, Güven TURGUT, Mustafa Furkan KESKENLER

Pages : 28-34

View : 24 | Download : 9

Publication Date : 2018-01-01

Article Type : Research Paper

Abstract :In this study, structural, morphological and optical properties of Te doped ZnO thin films prepared by sol-gel spin coating method were investigated. It was observed that the hexagonal wurtzite structure of ZnO for all samples and cubic zinc blende structure of ZnTe for 3 and 5 % at. Te doped ZnO films. The obtained films exhibited wurtzite insert ignore into journalissuearticles values(002); preferential growth in all the dopant ratios. Grain size values calculated from Scherrer’s formula of the films were varied in range of 107-188 nm. The band gap energy values were determined as 3.352, 3.292, 3.272, 3.248, 3.156 eV, respectively for undoped ZnO, 1%, 2%, 3%, 5% at. Te doped ZnO samples. Also, Urbach energy values of samples were found to be 2.07, 1.72, 1.34, 1.32, 0.97 eV for undoped ZnO, 1, 2, 3 and 5 at. % Te doped ZnO, respectively.
Keywords : ZnO, Te, Sol Gel, Urbach Rule, Steepness Parameters