Growth and structural properties of ZnO films on (10−10) m-plane sapphire substrates by plasma-assisted molecular beam epitaxy

Abstract

Articles you may be interested inEffects of gallium doping on properties of a -plane ZnO films on r -plane sapphire substrates by plasma-assisted molecular beam epitaxy

p-type non-polar m-plane ZnO films grown by plasma-assisted molecular beam epitaxy

“…Fig. 1, which is similar to the previous reports [10,16]. Note that the intensity of ZnO (1 0 1 3) peak is quite weak as compared with ZnO (1 0 1 0) peak.…”

“…To avoid this, the growth of nonpolar ZnO films such as a-plane (1 1 2 0) or m-plane (1 0 1 0) has therefore been proposed. There are several reports on growing non-polar a-plane ZnO on r-plane sapphire [7,8], m-plane ZnO on m-plane sapphire [9,10], m-plane ZnO on m-plane ZnO [11], and m-plane ZnO on (0 0 1) MgO [12]. Also, non-polar a-plane ZnO/(Zn,Mg)O quantum well structures have been realized [13,14].…”

Room-temperature electrically pumped near-infrared random lasing from high-quality m-plane ZnO-based metal-insulator-semiconductor devices

“…Therefore, semi-polar and nonpolar structures are proposed to diminish or even eliminate the polarization effects, and the nonpolar m-plane is one of the common structures [ 6 ]. Unfortunately, due to the coexistence of minor domains with <0001>, <11-22>, or <10-13 > growth directions in m-plane ZnO thin films [ 7 - 9 ], it is difficult to deposit high-quality and smooth m-plane ZnO thin films by several normal growth techniques, such as molecular beam epitaxy [ 7 , 8 ], metalorganic chemical vapor deposition [ 9 ], and pulsed laser deposition [ 10 ]. In addition, with different growth conditions, various striped features are usually presented on the surface of m-plane ZnO thin films deposited on foreign substrates [ 11 , 12 ].…”

Surface-bound-exciton emission associated with domain interfaces in m-plane ZnO films

“…Domains with ð0002Þ and ð10 13Þ orientations often coexist with the major ð10 10Þ oriented ones. 12,13 However, rare report on the epitaxial relationship of the extra domain with the m-ZnO matrix and no report, to the best our knowledge, correlating the existence of extra do-main with the optical property of m-ZnO film. Therefore, in this study, we first determine the epitaxial relationship of the extra domain and the m-ZnO by x-ray diffraction (XRD) and evaluate the extra domain content from the peak intensity ratio of extra domain to m-ZnO.…”