煅烧工艺对氧化锌铝(AZO)粉体光学性能的影响

采用聚丙烯酰胺凝胶法制备高浓度Al掺杂ZnO(AZO)前驱体(x(Al)=5.5mol%、6.5mol%), 研究煅烧工艺对AZO粉体光学性能的影响. 结果表明: 随着煅烧温度升高, Al在ZnO中的固溶度降低。当煅烧温度为750℃时, 生成ZnAl₂O₄相。提高煅烧温度, 粉体的紫外吸收峰从366 nm红移至373 nm; 延长煅烧时间, 紫外吸收峰发生蓝移, 吸收强度明显增大。室温下AZO粉体光致发光(PL)光谱主要由354 nm的紫外发射峰、406 nm的近边紫外发射峰和430 nm的蓝光发射峰组成。

Influence of Calcining Process on Optical Properties of Al-doped-ZnO Powders

AZO precursors (x(Al) =5.5mol%, 6.5mol%) were successfully synthesized by the polyacrylamide gel rout. The influence of calcining process on the optical properties of Al-doped-ZnO powders were investigated. It was found that Al concentration in the solution decreased with increasing calcination temperature. The ZnAl₂O₄ phase was detected in the AZO powders after calcined at 750℃. With increasing calcination temperature, the wavelength of UV absorbance peak was moved from 366 nm to 377 nm, while the peak displayed blue shift and the intensity was improved with prolonging calcination time. The room temperature photoluminescence spectra showed that emission peaks were composed of ultraviolet peak (354 nm), detectable ultraviolet peak (406 nm) and blue emission peak (430 nm).