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Growth of Epitaxial ZnSnxGe1-xN2 Alloys by MBE.

ABSTRACT: ZnSnxGe1-xN2 alloys are chemically miscible semiconductor compounds with potential application as earth-abundant alternatives to InxGa1-xN. Preparation of ZnSnxGe1-xN2 thin-films by reactive RF sputter deposition yield low-mobility, nanocrystalline films. In contrast, the growth of ZnSnxGe1-xN2 films by molecular-beam epitaxy (MBE) on c-plane sapphire and GaN templates is described herein. Epitaxial films exhibited 3D growth on sapphire and 2D single-crystal quality on GaN, exhibiting substantial improvements in epitaxy and crystallinity relative to nanocrystalline sputtered films. Films on sapphire were n-type with electronic mobilities as high as 18?cm2?V-1 s-1, an order of magnitude greater than the 2?cm2?V-1 s-1 average mobility observed in this work for sputtered films. Mobility differences potentially arise from strain or surface effects originating from growth techniques, or from differences in film thicknesses. In general, MBE growth has provided desired improvements in electronic mobility, epitaxy, and crystal quality that provide encouragement for the continued study of ZnSnxGe1-xN2 alloys.

SUBMITTER: Shing AM 

PROVIDER: S-EPMC5607306 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Growth of Epitaxial ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> Alloys by MBE.

Shing Amanda M AM   Tolstova Yulia Y   Lewis Nathan S NS   Atwater Harry A HA  

Scientific reports 20170920 1

ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> alloys are chemically miscible semiconductor compounds with potential application as earth-abundant alternatives to In<sub>x</sub>Ga<sub>1-x</sub>N. Preparation of ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> thin-films by reactive RF sputter deposition yield low-mobility, nanocrystalline films. In contrast, the growth of ZnSn<sub>x</sub>Ge<sub>1-x</sub>N<sub>2</sub> films by molecular-beam epitaxy (MBE) on c-plane sapphire and GaN templates is desc  ...[more]

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