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

doi:10.3724/SP.J.1077.2013.12185

Abstract

Abstract:

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).

Key words: AZO, XPS, UV-Vis absorbance property, photoluminescence, polyacrylamide gel rout

CLC Number:

TP104

WANG Zhi-Yong, PENG Chao-Qun, WANG Ri-Chu, WANG Xiao-Feng, LIU Bing. Influence of Calcining Process on Optical Properties of Al-doped-ZnO Powders[J]. Journal of Inorganic Materials, 2013, 28(2): 171-176.

Figures/Tables 10

Fig. 1 DSC curve of AZO precusor (x(Al)=5.5mol%)

Fig. 2 XRD patterns of AZO powders (x(Al)= 5.5mol%) calcined at different temperatures

Fig. 3 XPS survey spectrum of the AZO powders (x(Al)=5.5%) calcined at 600℃

Fig. 4 XPS data of Al element in AZO powders (x(Al)=5.5mol%) calcined at 600℃

Fig. 5 SEM images of AZO powders (x(Al)=5.5mol%) calcined at different temperatures

Fig. 6 UV-Vis absorbance spectra of AZO powders (x(Al)=5.5mol%) calcined at different temperatures

Fig. 7 UV-Vis absorbance spectra of AZO powders (x(Al)=6.5mol%) calcined at 550℃ for different time

Fig. 8 PL spectra of AZO powders (x(Al)=5.5mol%) calcined at different temperatures

Fig. 9 PL spectra of AZO powders (x(Al)=6.5mol%) calcined at 550℃ for different time

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