Significantly enhanced red photoluminescence properties of nanocomposite films composed of a ferroelectric Bi3.6Eu0.4Ti3O12 matrix and highly c-axis-oriented ZnO nanorods on Si substrates prepared by a hybrid chemical solution method.
Significantly enhanced red photoluminescence properties of nanocomposite films composed of a ferroelectric Bi3.6Eu0.4Ti3O12 matrix and highly c-axis-oriented ZnO nanorods on Si substrates prepared by a hybrid chemical solution method.
复制标题
DOI：
10.1021/ja910388f
复制
发表时间：
2010-01
影响因子：
15
通讯作者：
Hong Zhou;Xinman Chen;Guangheng Wu;F. Gao;N. Qin;D. Bao
中科院分区：
文献类型：
--
作者：
Hong Zhou;Xinman Chen;Guangheng Wu;F. Gao;N. Qin;D. Bao
我们发展了一种混合化学溶液法在Si衬底上制备由Bi（3.6）Eu（0.4）Ti（3）O（12）（BEuT）和高度c轴取向的ZnO纳米棒组成的纳米复合薄膜。首先，采用种子层溶液生长法制备高度c轴取向的ZnO纳米棒，然后采用化学溶液沉积法通过旋涂技术涂覆ZnO纳米棒制备BEuT基体。所获得的纳米复合薄膜表现出显着增强的红色光致发光（PL）性能。PL增强可归因于从ZnO纳米棒到BEuT基质中的Eu（3+）离子的非常有效的辐射能量转移，这是由于ZnO纳米棒的发射光谱与BEuT基质中的Eu（3+）离子的激发带之间的两个光谱重叠：ZnO在380nm处的紫外发射峰与Eu（3+）的（7）F（0）→（5）L（6）跃迁的激发光谱重叠在395 nm处，ZnO的缺陷相关深能级绿色发射带与Eu（3+）离子的（7）F（0）→（5）D（2）跃迁激发光谱之间存在一个中心波长为525 nm的带隙。我们的研究为实现高效光致发光铁电多功能集成薄膜器件提供了可能。此外，混合化学溶液法也为合成其他无机物基体与c轴取向ZnO纳米棒组成的新型纳米复合薄膜提供了一条有用的途径。
We have developed a hybrid chemical solution method for preparing nanocomposite thin films composed of a ferroelectric Bi(3.6)Eu(0.4)Ti(3)O(12) (BEuT) matrix and highly c-axis-oriented ZnO nanorods on Si substrates. First, a seed-layer solution growth approach was used to prepare the highly c-axis-oriented ZnO nanorods, and then a chemical solution deposition method was employed to fabricate the BEuT matrix by coating the ZnO nanorods using a spin-coating technique. The nanocomposite thin films obtained exhibited significantly enhanced red photoluminescence (PL) properties. The PL enhancement can be attributed to very efficient radiation energy transfer from the ZnO nanorods to Eu(3+) ions in the BEuT matrix due to two spectral overlaps between the emission spectra of the ZnO nanorods and the excitation bands of Eu(3+) ions in the BEuT matrix: the spectral overlap between the sharp UV emission of ZnO centered at 380 nm and the excitation spectrum of the (7)F(0) --> (5)L(6) transition of Eu(3+) ions at 395 nm and that between the defect-related deep-level green emission band of ZnO centered at 525 nm and the excitation spectrum of the (7)F(0) --> (5)D(2) transition of Eu(3+) ions at 465 nm. Our study opens possibility of realizing highly efficient photoluminescent ferroelectric multifunctional integrated thin-film devices. In addition, the hybrid chemical solution method also provides a useful route for the synthesis of some new nanocomposite thin films consisting of other inorganic matrix and c-axis-oriented ZnO nanorods.