Study of vanadium doping effects on structural, opto-thermal and optical properties of sprayed ZnO semiconductor layers

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• 作者：A. Mhamdi ; A. Boukhachem ; M. Madani ; H. Lachheb ; K. Boubaker ; A. Amlouk ; M. Amlouk
• 关键词：Zinc oxide ; Vanadium ; Single oscillator model ; Urbach tailing ; Amlouk?Boubaker opto-thermal expansivity ?AB
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：124
• 期：18
• 页码：3764-3770
• 全文大小：1308 K

文摘

In this work, the sprayed pyrolysis technique was carried out to prepare vanadium doped ZnO thin films with different controlled percentage (1?5 % ). Particularly, it has been demonstrated, through original conjoint morphological?structural and optical investigations that some interesting physical properties were implemented. Indeed, X-ray diffraction (XRD) analysis shows that the films with doping concentration less than 5 at. % have a w¨¹rtzite structure and grow mainly along the c-axis orientation. The surface morphology of the ZnO:V thin films was examined by AFM. On the other hand, the optical constants (refractive index, extinction coefficient and the dielectric constants (?₁ (¦Ë) ?₂ (¦Ë))) have been obtained by transmittance?reflectance data. The optical band gap energy was between 3.1 and 3.2 eV as doping concentration increased from 1 to 5 at. % mol. All the results have been discussed in terms of vanadium doping concentration.