| (Pb_(1-x)Sr_x)TiO_3薄膜的结构与光学特性研究 |
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| 引用本文： | 李群,唐新桂,熊惠芳,张伟.(Pb_(1-x)Sr_x)TiO_3薄膜的结构与光学特性研究[J].电子元件与材料,2009,28(11). |
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| 作者姓名： | 李群 唐新桂 熊惠芳 张伟 |
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| 作者单位： | 广东工业大学,物理与光电工程学院,广东,广州,510006 |
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| 基金项目： | 国家自然科学基金资助项目，广东省自然科学基金资助项目 |
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| 摘 要： | 采用sol-gel法制备(Pb1-xSrx)TiO3(x=0.40,0.50,0.60,0.70,简称PST40,PST50,PST60与PST70)前驱体溶液,通过旋涂工艺在石英玻璃基片上沉积PST薄膜。研究了PST薄膜的结构和光学特性。结果显示,经750℃退火30min,所得PST薄膜为晶化良好的钙钛矿立方结构,薄膜平均晶粒尺寸为200～300nm。750℃退火的PST40、PST50、PST60和PST70薄膜样品的直接带隙能分别为3.74,3.79,3.80和3.85eV。随着Sr含量的增加,带隙能增加。
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| 关 键 词： | (Pb1–xSrx)TiO3薄膜 sol-gel法 石英基片 结构 光学特性 |
Structure and optical properties of (Pb1-xSrx)TiO3 thin films |
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| LI Qun,TANG Xingui,XIONG Huifang,ZHANG Wei.Structure and optical properties of (Pb1-xSrx)TiO3 thin films[J].Electronic Components & Materials,2009,28(11). |
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| Authors: | LI Qun TANG Xingui XIONG Huifang ZHANG Wei |
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| Abstract: | Lead strontium titanate (Pb_(1-x)Sr_x)TiO_3 (x=0.40, 0.50, 0.60 and 0.70, abbreviated as PST40, PST50, PST60 and PST70, respectively) thin films were deposited on fused quartz substrates using a sol-gel method with spin-coating processing. The structure and optical properties of PST thin films were studied. The results show that the all samples are perovskite cubic structure when the PST thin films are annealed at 750 ℃ for 30 min. Its average grain size is 200～300 nm. The direct band gap energies are 3.74, 3.79, 3.80, and 3.85 eV, respectively for PST40, PST50,PST60 and PST70 thin films annealed at 750 ℃. The band energies are increased with increasing content of strontium. |
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| Keywords: | (Pb_(1-x)Sr_x)TiO_3 thin films sol-gel method fused quartz substrates structure optical properties |
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