(School of Materials Science and Engineering, Central South University, Changsha 410083, China)
摘 要: 采用聚丙烯酰胺凝膠法制備Al摻雜ZnO(AZO)前驅(qū)體，在500和600 ℃下煅燒獲得AZO粉體。采用DSC、XRD、SEM、UV-vis吸收和熒光發(fā)光(PL)對粉體進(jìn)行表征，研究Al摻雜濃度對AZO粉體光學(xué)性能的影響。結(jié)果表明：在600 ℃煅燒溫度下，Al3+的固溶度可高達(dá)8%(摩爾分?jǐn)?shù))，摻雜后的AZO粉體晶粒尺寸明顯減小；隨著摻雜濃度提高，AZO粉體的紫外吸收波長先“藍(lán)移”而后“紅移”，當(dāng)Al摻雜濃度為5.5%(摩爾分?jǐn)?shù))時，紫外吸收波長最短，為367 nm(3.38 eV)；未摻雜與Al摻雜的ZnO粉體均具有406 nm的近邊紫外峰和430 nm的藍(lán)光發(fā)射峰。
關(guān)鍵字: AZO粉體；UV-vis吸收；光致發(fā)光；聚丙烯酰胺凝膠法；紫外發(fā)射；藍(lán)光發(fā)射
（School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract:Al-doping-ZnO (AZO) precursors were successfully synthesized by the polyacrylamide gel rout. The AZO powders were obtained at the calcining temperatures of 500 and 600 ℃. The powders were characterized with DSC, XRD, SEM, UV-vis spectrometer and luminescent spectrometer. The influence of Al concentration in the solution on optical properties of AZO powders was investigated. The results show that Al doping concentration in the solution is 8% (mole fraction) at the calcining temperature of 600 ℃. The grain size of powders decreases with increasing Al concentration. A blue shift of the UV-vis absorbance wavelength is observed firstly, and then a red shift later with increasing Al concentration. While the Al concentration reaches 5.5% (mole fraction), the shortest absorbance wavelength is 367 nm (3.38 eV). The UV peak of 406 nm and blue emission peak of 430 nm are detected in both non-doped and doped samples.
Key words: AZO powder; UV-vis absorbance; photoluminescence; polyacrylamide gel rout; ultraviolet emission; blue emission
