Large enhancement of photoluminescence in SrTiO₃:Pr³⁺ powders by fluorhydric acid treatment

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• 作者：Xiuxian He ; Renqing Guo ; Wen Dong ; Fengang Zheng ; Liang Fang ; Mingrong Shen
• 关键词：SrTiO₃ ; Pr³⁺ powders ; Oxygen vacancies ; Photoluminescence
• 刊名：Journal of Luminescence
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：130
• 期：8
• 页码：1349-1352
• 全文大小：460 K

文摘

We have investigated the effect of fluorhydric acid (HF) treatment on the photoluminescence (PL) properties of SrTiO₃:Pr³⁺ powders prepared by sol–gel method. The red emission intensity increased significantly up to 18 times when the powders were subjected into a water-diluted 5 % HF solution for 10 min. The origin of the PL enhancement was ascribed to the increase of oxygen vacancies in HF-treated SrTiO₃:Pr³⁺ powders. This study also manifested that HF etching is more effective to improve the red PL intensity than vacuum-annealing for the sol–gel made SrTiO₃:Pr³⁺ powders.