无机材料学报

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溅射制备非晶氮化镓薄膜的光学性能

潘孝军, 张振兴, 贾璐, 李晖, 谢二庆   

  1. 兰州大学物理科学与技术学院, 兰州 730000
  • 收稿日期:2006-07-12 修回日期:2006-09-12 出版日期:2007-07-20 网络出版日期:2007-07-20

Optical Properties of a-GaN Film Deposited by DC Magnetron Sputtering

PAN Xiao-Jun, ZHANG Zhen-Xing, JIA Lu, LI Hui, XIE Er-Qing   

  1. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2006-07-12 Revised:2006-09-12 Published:2007-07-20 Online:2007-07-20

摘要: 利用直流磁控溅射方法制备了GaN薄膜. X射线衍射及Raman光谱结果表明薄膜样品为非晶结构; 傅立叶红外光谱表明薄膜样品的主要吸收峰为Ga--N键的伸缩振动; 光致发光测试得到了360nm处的紫外发光谱; 测量薄膜样品的紫外-可
见谱, 并利用Tauc公式计算得到样品的光学带隙为3.74eV, 这与光致发光谱得到的结果是一致的.

关键词: 非晶氮化镓, 溅射制备, 光学性能

Abstract: GaN thin films were prepared by direct current (DC) planar magnetron sputtering on Si and SiO$_2$. The films were characterized by X-ray diffraction (XRD), Raman, Fourier Transform Infrared Spectroscopy (FTIR), photoluminescence (PL) and UV-Vis spectra. XRD and Raman spectrum show that the films are amorphous. Fourier infrared absorbance spectrum shows
that the main absorbance is Ga-N stretching vibration. 360nm ultraviolet emission is obtained at room temperature. UV-Vis result shows that the optical band gap of the films is 3.74eV, which is consistent with photoluminescence spectrum result.
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Key words: amorphous GaN, DC sputtering, optical properties

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