中国激光, 2007, 34 (9): 1282, 网络出版: 2007-10-17
温度对飞秒激光沉积ZnO/Si薄膜的结构和性能的影响
Effect of Temperature on Structure and Properties of Femtosecond Laser Deposited Silicon Based Zinc Oxide Thin Films
薄膜 ZnO薄膜 飞秒激光沉积 纳米晶结构 thin films zinc oxide films femtosecond laser deposition nano-crystal structure
摘要
通过飞秒脉冲激光(50 fs,800 nm,1 kHz,2 mJ)沉积技术在n型Si(100)单晶基片上制备了ZnO薄膜。详细研究了基片温度变化以及退火处理对ZnO薄膜的结构、表面形貌及光学性质的影响。X射线衍射(XRD)结果表明,不同温度下(20~350 ℃)生长的ZnO薄膜具有纤锌矿结构,并且呈c轴择优取向;当基片温度为80 ℃时,薄膜沿(002)晶面高度择优生长;当基片温度为500 ℃时薄膜沿(103)晶面择优生长,场发射扫描电子显微镜(FEEM)结果表明薄膜呈纳米晶结构,并观察到了ZnO的六方结构。进一步通过透射光谱的测量讨论了基片温度及退火处理对ZnO薄膜光学透射率的影响,结果表明退火后薄膜的透射率增大。
Abstract
Zinc oxide films were prepared on n type Si(100) substrate using femtosecond laser deposition with laser parameters as follows: pulse width 50 fs, wavelength 800 nm, repeat frequency 1 kHz, and pulse energy 2 mJ. The effects of substrate temperature change and annealing on the structure, surface morphology and optical properties of the ZnO films were discussed. The X-ray diffraction (XRD) results showed the ZnO films deposited under different temperature (20~350 ℃) were with wurtzite structure and highly c-axis oriented. When the substrate silicon was 80 ℃ the film was highly (002)-oriented, and (103)-oriented at 500 ℃. The nano-crystal structure of the films and hexagonal structure of ZnO were observed with a field-emission electron microscope (FEEM). The effects of substrate temperature and annealing on the optical transmissivity of ZnO films were discussed by transmitted spectra, and the transmissivity was increased after annealing.
杨义发, 龙华, 杨光, 戴能利, 郑启光, 陆培祥. 温度对飞秒激光沉积ZnO/Si薄膜的结构和性能的影响[J]. 中国激光, 2007, 34(9): 1282. 杨义发, 龙华, 杨光, 戴能利, 郑启光, 陆培祥. Effect of Temperature on Structure and Properties of Femtosecond Laser Deposited Silicon Based Zinc Oxide Thin Films[J]. Chinese Journal of Lasers, 2007, 34(9): 1282.