Title

Cubic ZnXMg1-XO Thin Films Grown By Plasma-Assisted Molecular-Beam Epitaxy For Optoelectronic Applications

Abstract

Heteroepitaxial ZnxMg1-xO thin films were grown on lattice-matched MgO (100) substrates using radiofrequency plasma-assisted molecular-beam epitaxy. High-quality epilayers with zinc concentrations ranging from x = 0 (MgO) to x = 0.65 were grown and characterized optically, structurally, and electrically. The ZnxMg1-xO films were found to maintain the rocksalt cubic (81) crystal structure for concentrations z <0.65, with a linear dependence of lattice constant on Zn concentration. X-ray diffraction (XRD) also revealed the emergence of phase segregation into wurtzite (54) phase for the highest concentration film. The band gap energy of the films was successfully varied from 4.9 to 6.2 eV (253-200 nm), showing a linear relationship with Zn concentration. The strictly cubic films exhibit roughness on the order of 10 Å and resistivities of approximately 10 6 ω.cm. © 2010 Materials Research Society.

Publication Date

6-1-2010

Publication Title

Journal of Materials Research

Volume

25

Issue

6

Number of Pages

1072-1079

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1557/jmr.2010.0150

Socpus ID

77958119683 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77958119683

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