Katıhal reaksiyon yöntemi ile sentezlenen Al ve Mg katkılı ZnO' nun yapısal ve optik özellikleri

Abstract

Bu çalışmada, katıhal reaksiyon yöntemi ile hazırlanan Al ve Mg katkılı çinko oksidin Zn0.98M0.02O (M = Al, Mg) yapısal ve optik özellikleri incelenmiştir. Yapısal ve optik özellikleri incelemek için X-ışını kırınımı (XRD), Taramalı Elektron Mikroskobu (SEM), UV-Görünür spektroskopisi (UV-Vis) ve Fourier Dönüşümü Kızılötesi (FTIR) spektroskopisi kullanılmıştır. XRD analizi ile tüm örneklerin altıgen wurtzite yapıda olduğu ve hiçbir safsızlık fazı olmadığı ortaya çıkmıştır. Yansıma spektrumları örneklerin optik bant aralığını belirlemek için kullanılmıştır. Katkısız ZnO örneğinin 3.16 eV enerji band aralığına sahip olduğu ve Al ve Mg katkısı ile arttığı gözlenmiştir, ki bu muhtemelen örgü parametrelerindeki düşüşten kaynaklanmaktadır. Katkısız ve katkılı ZnO' nun yapısal bağ titreşimleri FTIR spektroskopisi ile analiz edilmiştir, ve tüm örnekler için Zn-O bağının, gerilme titreşimine karşılık gelen, geniş soğrulma bandının yaklaşık 550 cm-1’ de olduğu görülmüştür.

Keywords

• Yarıiletkenler
• ZnO
• XRD
• UV-Görünür spektroskopisi
• FTIR
• SEM

The structural and optical properties of Al and Mg doped ZnO synthesized by solid state reaction method

Abstract

In this study, the structural and optical properties of Al and Mg doped zinc oxide Zn0.98M0.02O (M= Al, Mg) prepared by solid state reaction method is investigated. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV-Visible spectroscopy (UV–Vis) and Fourier Transform Infrared (FTIR) spectroscopy were employed to study the structural and optical properties. With XRD analysis, it was revealed that all the samples are hexagonal wurtzite structure and exhibit no impurity phases. The reflectance spectra was used to determine the optical band gap of the samples. And it was found that undoped ZnO sample has an energy band gap of 3.16 eV which increases with Al and Mg doping, probably driven by the decrease in the lattice parameters. The structural bond vibrations of undoped and doped ZnO were analysed by FTIR spectroscopy, and it was seen that the broad absorption band is at approximately 550 cm-1 for all the samples, which corresponds to the stretching vibration of Zn–O bond.

Keywords

• Semiconductors
• ZnO
• XRD
• UV-Visible spectroscopy
• FTIR
• SEM

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