Impact of Mg content on native point defects in MgxZn1−xO (0 ≤ x ≤ 0.56) | Zendy

John D. Perkins | Zendy; Geoffrey M. Foster | Zendy; M. Myer | Zendy; Sonali Mehra | Zendy; J.M. Chauveau | Zendy; A. Hierro | Zendy; A. RedondoCubero | Zendy; Wolfgang Windl | Zendy; L. J. Brillson | Zendy

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Impact of Mg content on native point defects in Mg_xZn_1−xO (0 ≤ x ≤ 0.56)

Author(s) -

John D. Perkins,

Geoffrey M. Foster,

M. Myer,

Sonali Mehra,

J.M. Chauveau,

A. Hierro,

A. RedondoCubero,

Wolfgang Windl,

L. J. Brillson

Publication year - 2015

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4915491

Subject(s) - cathodoluminescence , materials science , analytical chemistry (journal) , zinc , spectroscopy , doping , crystallographic defect , isostructural , surface photovoltage , crystallography , chemical physics , chemistry , metallurgy , crystal structure , luminescence , physics , optoelectronics , chromatography , quantum mechanics

We used depth-resolved cathodoluminescence spectroscopy and surface photovoltage spectroscopy to measure the densities, energy levels, and spatial distributions of zinc/magnesium cation and oxygen vacancies in isostructural, single-phase, non-polar MgxZn1−xO alloys over a wide (0 ≤ x ≤ 0.56) range. Within this wide range, both defect types exhibit strong Mg content-dependent surface segregation and pronounced bulk density minima corresponding to unit cell volume minima, which can inhibit defect formation due to electrostatic repulsion. Mg in ZnO significantly reduces native defect densities and their non-polar surface segregation, both major factors in carrier transport and doping of these oxide semiconductors

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