Study on the optical absorption and green emission of ZnO phosphors by varying Al doping contents

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• 作者：Chundong Li ; Jinpeng Lv ; ^{hitlv@yahoo.com.cn} ; Zhiqiang Liang ; Shulong Yao
• 关键词：ZnO ; Optical absorption ; Photoluminescence ; Defects
• 刊名：Optical Materials
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：35
• 期：3
• 页码：586-589
• 全文大小：1083 K

文摘

The blue band optical absorption and green luminescence of ZnO phosphors doping with aluminum are systematic studied. The Al content is varied from 0.01 at. % to 1 at. % . SEM images illustrated that Al doping can effectively suppress the ZnO grain growth. XRD results clearly manifest that the Al solubility limit in ZnO is around 0.1 at. % . It is also found that the E₁ (LO) vibration mode in the Raman spectra exhibits a good correlation with the blue band optical absorption and green photoluminescence. The results revealed that both and can give rise to the E₁ (LO) vibration mode. We conclude that the V_O and O_i defects are the dominant reason of the green photoluminescence in ZnO phosphors, in oxygen-deficient and oxygen-rich conditions, respectively.