Synthesis and photoluminescence characterizations of the Er³⁺-doped ZnO nanosheets with irregular porous microstructure

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• 作者：Jihui Lang ; Jiaying Wang ; Qi Zhang ; Songsong Xu ; Donglai Han ; Jinghai Yang ; ^{jhyang1@jlnu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qiang Han ; Lili Yang ; Yingrui Sui ; Xiuyan Li ; Xiaoyan Liu
• 关键词：Oxides ; Chemical synthesis ; Optical properties ; Defects
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：41
• 期：Complete
• 页码：32-37
• 全文大小：1975 K

文摘

Er-doped ZnO nanosheets with high quality were synthesized by the hydrothermal and post-annealing techniques, and the effect of erbium dopant on the structures, morphologies and photoluminescence properties of the as-synthesized samples were determined using XRD, SEM, TEM, EDS, PL and Raman spectroscopy. The results showed that Er³⁺ ions were successfully incorporated into the crystal lattice of ZnO host, and some irregular porous microstructure with diameter of 3–10 nm could be seen on ZnO nanosheets as various doping concentrations. It was found that the crystallization and photoluminescence properties of ZnO nanosheets were strongly influenced by erbium doping concentration. The ultraviolet emission and deep level emission were both appeared in PL spectra, and the intensity of the whole deep level emission was enhanced with erbium doping, indicating the deep-level-defect luminescent centers were increased in the doped samples. Moreover, the crystallization of the samples became worse due to more defects by erbium doping.