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BaTiO₃铁电薄膜的光致发光研究

Study on the photoluminescence of BaTiO₃ ferroelectric film

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【Author】 PENG Jing1,4,FU Yong-hua2,3,XU Zhi-mou2,3,OUYANG Yi-bing2,3,CHEN Zhi-wei2,3,WANG Shuang-bao2,3,CHEN Cun-hua5(1.College of Sciences,Wuhan University of Science and Technology,Wuhan 430081,China;2.Wuhan National Laboratory for Optoelectronics,Wuhan 430074,China;3.College of Optoelectronic Science and Engineering,Huazhong University of Science and TechnologyWuhan 430074,China;4.Physical Science and Technology Institute,Wuhan University,Wuhan 430072,China;5.School of Chemistry,Central China Normal University,Wuhan 430079,China)

【机构】武汉科技大学理学院；武汉大学物理科学与技术学院；武汉光电国家实验室(筹)；华中科技大学光电子科学与工程学院；华中师范大学化学学院；

【摘要】以分析纯的乙酸钡和钛酸正四丁酯为前躯体溶液,冰乙酸为溶剂,乙酰丙酮为稳定剂,采用溶胶-凝胶法在硅基上制备了钛酸钡(BaTiO3)铁电薄膜。研究了BaTiO3铁电薄膜的光致发光性能。结果表明,室温下非晶态的BaTiO3铁电薄膜在蓝光激发下具有很强的光致发光现象。其中,经8h 673K退火处理的非晶BaTiO3铁电薄膜的光致发光性能最佳,当455nm光激发时,非晶薄膜在540～660nm内发出强烈的黄光,峰值波长为580～610nm,峰宽约30nm,发光强度随薄膜的厚度增加而增强。晶态BaTiO3铁电薄膜无任何发光现象。更多还原

【Abstract】 BaTiO₃ ferroelectric film was prepared on Si substrate by sol-gel method using barium acetate and tetrabutyl titanate as precursor,glacial acetic acid as solvent,and acetylacetone as stabilizer.The photoluminescence PL of BaTiO₃ ferroelectric film was studied.The results showed that intense photo-luminescence in amorphous BaTiO₃ ferroelectric film excited by blue light was observed at room temperature.The film annealed at 673K for 8 hours has the best PL property.The emission band is from 540-660nm in the visible region.The peak wavelengths are from 580-610nm and the peak width is about 30nm.But the crystal one has no properties above.更多还原