Photoluminescent Properties of Al Doped ZnO by Microwave Induced Combustion Method

Abstract:

Al-doped ZnO nanomaterials were synthesized by microwave-induced combustion method using urea as main fuel, aluminum nitrate provide doping ions and zinc nitrate as oxidant. The effects of microwave power, amount of urea and ratio aluminum nitrate to zinc nitrate on the properties of synthesized sampler were investigated .X-ray, diffraction(XRD), scanning electron microscope(SEM), and photoluminescence(PL) were used to characterize the properties of the sample respectively. The experimental results show that ZnO nanomaterials with cubic ZnO crystal phase of best optical property are obtained at 340W when molar ratio of the zinc nitrate to aluminum nitrate is 40% and fuel just completely reaction. The average primary granularity of the synopsized sample is about 56rnm estimated according to Scherrer Equation. PL test results indicate that the Ultraviolet(UV) emission peak in 360nm can be attributed to the recombination of free excitations through an excitation-excitation collision process, and the green emission peak in 470nm is commonly referred to a deep-level or trap-state.

• Periodical: Advanced Materials Research (Volumes 554-556)
• Pages: 644-648
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.554-556.644
• Online since: July 2012
• Authors: Yuan Cao, Ya Tao Wang, Ping Li
• Keywords: Al-Doped ZnO, Microwave-Induced Combustion Method, ZnO Nanomaterials

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