Large enhancement of photoluminescence in SrTiO3:Pr powders by fluorhydric acid treatment |
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Authors: | Xiuxian He |
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Institution: | Jiangsu Key Laboratory of Thin Films and Department of Physics, Soochow University, Suzhou 215006, People’s Republic of China |
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Abstract: | 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. |
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Keywords: | SrTiO3:Pr3+ powders Oxygen vacancies Photoluminescence |
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