摘要
用溶胶-凝胶法制备了不同浓度(0、1%、3%、5%(摩尔分数))的Nd掺杂钛酸锶钡(Ba0.65Sr0.35TiO3,BST)薄膜。XRD结果表明,经700℃退火1h后,样品晶化为完整的多晶钙钛矿结构,平均晶粒尺寸为20nm。原子力显微镜(AFM)观察发现,薄膜表面均匀致密,光滑平整。室温光致发光谱(PL)显示在808nm氩离子激光激发下,Nd掺杂的BST薄膜在876、1060、1337nm处有较强的近红外(NIR)发光,分别对应于Nd3+的4F3/24-I9/24、F3/2-4I11/24、F3/2-4I13/2跃迁。这些结果表明Nd掺杂BST薄膜在激光器和光放大器等光电器件领域有着广泛的应用前景。
Ba0.65Sr0.35TiO3 （BST） thin films with different Nd-doped concentration have been frabracated on silicon substrates by modified sol-gel process. All the samples were annealed at 700℃for 60min. The structural and morphological properties of the films were examined by X-ray diffraction （XRD） and atomic force microscopy （AFM）. XRD studies indicated that both pure and doped BST thin films show well-crystallized perovskite structures, the particle size is about 20nm. AFM images display the films have high quality and fine-grained polycrystalline structure. The photoluminescence spectra（PL） were carried out using the 808nm Ar^＋ laser line as the excitation source at room temperature. The Nd-doped BST thin films show three NIR luminescence peaks corresponding to ^4F3/2^-4I9/2 transition at 876nm; ^4F3/2^-4I11/2 transition at 1060nm and ^4F3/2^-4I13/z transition at 1337nm respectively. Influence of Nd^3＋ concentration to the microstructure and the luminescence properties were discussed. All the results showed that the Nd-doped BST films may have great potential use for novel integrated optic devices.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2009年第2期194-196,200,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50672022)
关键词
BST薄膜
ND掺杂
微结构
光致发光
BST thin films
Nil-doped
microstucture
photoluminescence
