ZnO films grown on Si substrates with au nanocrystallites as nuclei

被引:8
作者
Feng, Xia
Kang, Junyong [1 ]
Inami, Wataru
Yuan, Xiaoli
Terauchi, Masami
Sekiguchi, Takashi
Tsunekawa, Shin
Ito, Shun
Sakurai, Toshio
机构
[1] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Photon Res Ctr, Xiamen 361005, Peoples R China
[3] Tohoku Univ, Int Frontier Ctr Adv Mat, Sendai, Miyagi 980, Japan
[4] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 980, Japan
[5] Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki, Japan
[6] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan
关键词
D O I
10.1021/cg060237s
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
ZnO films were grown on Si substrates with Au nanocrystallites at different temperatures. The morphologies of Au at different annealing temperatures suggest that Au nanocrystallites can perform in the role of crystal nucleus. Surface morphologies of as-grown ZnO films were characterized as a number of hexagonal heaps in the size range of 3-5 mu m by scanning electron microscopy. X-ray diffraction data support the theory that the ZnO grains are well-aligned in the c-axis. Cathodoluminescence mappings show that the ultraviolet emission at the band edge is suppressed on top of the hexagonal heap in which the green band is intense. The red shift of the E-2 mode demonstrates that the ZnO films in our work are under a weak tensile stress. This should be attributed to the effect of Au nanocrystallites. The convergent beam electron diffraction (CBED) patterns further reveal that the ZnO films grow in Zn-polar. An ab initio simulation agrees well with the results obtained from the CBED images and provides an intrinsic geometry of the growth of ZnO films.
引用
收藏
页码:564 / 568
页数:5
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