Synthesis of Fe-Doped ZnO Nanorods by Rapid Mixing Hydrothermal Method and Its Application for High Performance UV Photodetector

Chan Oeurn Chey,Magnus Willander,A Riazanova,Ansar Masood,K V Rao,Xianjie Liu,Omer Nur

doi:10.1155/2014/524530

Chan Oeurn Chey, Magnus Willander + Show 5 more

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https://doi.org/10.1155/2014/524530

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Abstract

We have successfully synthesized Fe-doped ZnO nanorods by a new and simple method in which the adopted approach is by using ammonia as a continuous source ofOH-for hydrolysis instead of hexamethylenetetramine (HMT). The energy dispersive X-ray (EDX) spectra revealed that the Fe peaks were presented in the grown Fe-doped ZnO nanorods samples and the X-ray photoelectron spectroscopy (XPS) results suggested that Fe3+is incorporated into the ZnO lattice. Structural characterization indicated that the Fe-doped ZnO nanorods grow along thec-axis with a hexagonal wurtzite structure and have single crystalline nature without any secondary phases or clusters of FeO or Fe3O4observed in the samples. The Fe-doped ZnO nanorods showed room temperature (300 K) ferromagnetic magnetization versus field (M-H) hysteresis and the magnetization increases from 2.5 μemu to 9.1 μemu for Zn0.99Fe0.01O and Zn0.95Fe0.05O, respectively. Moreover, the fabricated Au/Fe-doped ZnO Schottky diode based UV photodetector achieved 2.33 A/W of responsivity and 5 s of time response. Compared to other Au/ZnO nanorods Schottky devices, the presented responsivity is an improvement by a factor of 3.9.

Highlights

Diluted transition metals (TMs) doped ZnO nanomaterials result in changing of the structural, electrical, magnetic, and optical properties of ZnO nanostructures
The energy dispersive X-ray (EDX) spectra revealed that the Fe peaks were presented in the grown Fe-doped ZnO nanorods samples and the X-ray photoelectron spectroscopy (XPS) results suggested that Fe3+ is incorporated into the ZnO lattice
Fe-doped ZnO nanoparticles were prepared by the coprecipitation method [9,10,11], while Fe-doped ZnO powders and Fe-doped ZnO nanorods array have been synthesized via other high temperature methods [12, 13]; Fe-doped ZnO thin films were deposited by sputtering and spin coated methods [14,15,16,17,18,19,20,21,22,23], and Fe-doped ZnO nanorods were grown Journal of Nanomaterials by the hydrothermal methods [24,25,26,27]

Summary

Introduction

Diluted transition metals (TMs) doped ZnO nanomaterials result in changing of the structural, electrical, magnetic, and optical properties of ZnO nanostructures. Transition metal doped ZnO especially is promising material as a room temperature ferromagnetic diluted magnetic semiconductors. Among the TMs doped ZnO nanomaterials, Fe-doped ZnO nanorods are of great potential in many applications due to the excellent electronic, magnetic, and optical properties [8]. New device applications of Fedoped ZnO nanomaterials have attracted many researchers to synthetize this material using many different physical and chemical methods. Many methods have been used to synthesize Fe-doped ZnO nanomaterial with different morphologies which has been published in the literature. Fe-doped ZnO nanoparticles were prepared by the coprecipitation method [9,10,11], while Fe-doped ZnO powders and Fe-doped ZnO nanorods array have been synthesized via other high temperature methods [12, 13]; Fe-doped ZnO thin films were deposited by sputtering and spin coated methods [14,15,16,17,18,19,20,21,22,23], and Fe-doped ZnO nanorods were grown

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