The Larger Grain and (111)-Orientation Planes of Poly-Ge Thin Film Grown on SiO<sub>2</sub>Substrate by Al-Induced Crystallization

• 作者: Junhuo Zhuang Shaoguang Dong Yaguang Zeng
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 化学
• 关键词: Al-Induced Crystallization Poly-Ge Thin Film Diffusion Control INTERLAYER Lower ANNEALING Temperature
• 年，卷（期）: 2018,（2）
• 页码范围: 22-32
• 页数: 11页
• 分类号: O6

摘要

Al-induced crystallization yields the larger grain and (111)-orientation planes of poly-Ge thin film grown on SiO2 substrate, the (111)-orientation planes of poly-Ge thin film grown on SiO2 substrate are very important for the superior performance electronics and solar cells. We discussed the 50 nm thickness poly-Ge thin film grown on SiO2 substrate by Alinduced crystallization focusing on the lower annealing temperature and the diffusion control interlayer between Ge and Al thin film. The (111)-orientation planes ratio of poly-Ge thin film achieve as high as 90% by merging the lower annealing temperature (325℃) and the GeOx diffusion control interlayer. Moreover, we find the lack of defects on poly-Ge thin film surface and the larger average grains size of poly-Ge thin film over 12 μm were demonstrated by electron backscatter diffraction measurement. Our results turn on the feasibility of fabricating electronic and optical device with poly-Ge thin film grown on SiO2 substrate.