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Interface structures of inclined ZnO thin film on (0 1 1)-MgO substrate with bulk-like optical properties

Journal Article · · Applied Surface Science
 [1];  [2];  [1];  [1];  [1];  [1];  [3];  [3];  [4];  [5];  [1]
  1. Xiamen Univ. (China)
  2. Xiamen Univ. (China); Shandong Univ., Jinan (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Shandong Univ., Jinan (China)
  5. National Sun Yat-Sen Univ., Kaohsiung (Taiwan); Univ. of Houston, TX (United States)

Combining different phase structure materials with unique properties to design novel devices plays a significant role in the development of modern electronics. Here, we explore the characteristics of this type of complex interface and epitaxy structures based on the coupling between hexagonal ZnO film and cubic MgO substrate. The ZnO film was prepared by the molecular beam epitaxy technique on the MgO (0 1 1) substrate. The analysis results from the in situ reflection high energy electron diffraction patterns, X-ray diffraction (XRD)-pole figures and high resolution transmission electron microscopy images demonstrate that the film exhibits two-fold symmetry domains with a growth direction deviated from c-axis at about 31º along the [0 1 0] MgO or [0 $$\bar{1}$$ 0] MgO azimuth. Despite the intertwined diffusion from Zn and Mg atoms in the interface, which is the possible origin of a blue shift of about 0.083 eV in the Photoluminescence (PL) spectrum, the inclined film shows a full width at half maximum value that is close to the reported value from the high quality film. Finally, this work hopefully provides useful insights to the design and exploration of the novel optoelectronic devices that involve the integration of materials with different structure and different properties.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC); Fundamental Research Funds of Shandong Univ.
Grant/Contract Number:
SC0012704
OSTI ID:
1607981
Alternate ID(s):
OSTI ID: 1702634
Report Number(s):
BNL--213769-2020-JAAM
Journal Information:
Applied Surface Science, Journal Name: Applied Surface Science Journal Issue: C Vol. 509; ISSN 0169-4332
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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