The Research On Synthesis And Ptoperty Of MgZnO Nanomaterials By Electrodeposition Method

Semiconductor material Zn O has attracted extensive attention due to its large exciton binding energy. Zn O has promising application prospects in optoelectronic fields, such as environmental monitoring, missile tail flame, solar cell panel and liquid crystal display due to superior photoelectric property and piezoelectric property. Zn O based ultraviolet detector only can detect a particular wavelength because of its band gap(3.37 e V). In this study, we modulate the band gap of Zn O by doping Mg elements. It is reported that Mg Zn O nano material which could be used on solar-blind ultraviolet(UV) detection has been achieved by chemical vapor deposition(CVD), molecular beam epitaxy(MBE), sputtering and pulse laser deposition(PLD) method, but the synthesis of high Mg components Mg Zn O nanostructure by electrochemical deposition method has not been reported by now. In this paper, Mg Zn O nanostructures were fabricated using the electrodeposition method. The mainly research contents are as the follows.1. Zn O nanorod arrays have been prepared on indium tin oxide-coated glass(ITO) by electrochemical deposition technique. Zn O buffer layer has been achieved by sol-gel method. Researches show that altering the pulling times could improve the crystallinity and orientation of Zn O nanorobs.2. The effects of Mg2+ concentration on morphology of Zn O nanostructures have been investigated by changing the concentration of zinc nitrate electrolyte and magnesium nitrate electrolyte. We found that the suitable concentration of magnesium nitrate electrolyte could promote the growth of Zn O nanorods, when the the concentration of zinc nitrate electrolyte was low. The suitable concentration of magnesium nitrate electrolyte could promote the growth of Zn O nanosheets, when the concentration of zinc nitrate electrolyte was high.3. Mg Zn O nanostructure has been obtained by electrochemical deposition technique. XRD results showed that(002) position peak has a slight shift with increasing Mg dopant concentration in Mg Zn O materials. When the concentration of zinc nitrate electrolyte was constant, with increasing the amount of the Mg source, the size of Mg Zn O nanostructure increased initially then reduced, which was induced by the unbalance quantity of Zn2+, Mg2+ and OH-. High crystalline and ordered Mg Zn O nanostructure could be obtained when the aqueous electrolyte solution was composed of 2m M Mg(NO3)2 and 4m M Zn(NO3)2. Thus, 2m M Mg(NO3)2 and 4m M Zn(NO3)2 were the best concentration of electrolyte to fabricate Mg Zn O nanostructure. Under this electrolyte aqueous solution, the influence of deposition potential and temperature on the morphology and property of Mg Zn O material have been studied. The results indicated that optimum deposition potential is-1V and optimal deposition temperature is 60℃.