Mg_(0.66)Zn_(0.34)O薄膜的微观结构及光学性能(英文)

MICROSTRUCTURE AND OPTICAL PROPERTIES OF Mg_(0.66)Zn_(0.34)O FILM

采用溶胶-凝胶法在石英玻璃衬底上制备了Mg0.66Zn0.34O薄膜,研究了Mg0.66Zn0.34O薄膜的结构和光学性能,结果表明:石英玻璃衬底上Mg0.66Zn0.34O薄膜呈面心立方岩盐结构,晶格常数为0.42338nm,比MgO的晶格常数(0.0021nm)大。扫描电镜分析显示:薄膜均匀且平均粒径约为10nm。吸收光谱表明:薄膜的吸收带边位于276nm,相应的禁带宽度为4.49eV,该薄膜的吸收边位于日盲区;发光光谱由3个发射峰组成,峰值分别位于384.8nm(3.22eV)、443.7nm(2.79eV)和532.9nm(2.33eV),激发光谱峰值位于379nm(3.28eV)。

Magnesium-zinc oxide（Mg0.66Zn0.34O） film was prepared on quartz glass substrate by the sol–gel method. The structure and optical properties of Mg0.66Zn0.34O film were studied. Results indicate that Mg0.66Zn0.34O film deposited on quartz glass has a face-centered cubic rock salt structure. The lattice constant is 0.423 34 nm,which is 0.002 1 nm larger than that of MgO. The scanning electron microscope analysis reveals that the film is homogenous and the average grain size is 10 nm. The absorption spectrum indicates the absorption edge is located at 276 nm and the forbidden bandwidth is 4.49 eV correspondingly. The absorption edge of film is located in the solar blind region. The luminescence spectrum of the sample is composed of three peaks, at 384.8 nm （3.22 eV）, 443.7 nm （2.79 eV） and 532.9 nm （2.33 eV）, respectively, and the peak of excitation spectrum is at 379 nm （3.28 eV）.