Space Radiation Damage in ZnO Induced by Subthreshold Electrons: Defect Identity and Optical Degradation

X. D. Wang; S. Y. He; D. Z. Yang; P. F. Gu

doi:10.1667/RR2518.1

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X. D. Wang,¹ S. Y. He,² D. Z. Yang,² P. F. Gu¹

¹aSchool of Materials Science and Engineering, University of Science and Technology Beijing, 30 Xueyu
²bSpace Materials & Environment Engineering Lab, Harbin Institute of Technology, 92 West Da-Zhi Stree

Abstract

Space radiation damage in ZnO induced by subthreshold electrons was studied through reflectance spectra, electron paramagnetic resonance, and photoluminescence. Owing to the vacuum freezing treatment, perturbed singly ionized zinc vacancies (V′_Zn⁻), chemisorbed species, and electrons in the conduction band and/or bound to shallow donor levels were observed. V′_Zn⁻ is due to the ionization and the ionization-induced diffusion processes and is most likely responsible for the 420-nm absorption band. These results also support that the green luminescence in ZnO is related to zinc vacancies.

by Radiation Research Society

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X. D. Wang, S. Y. He, D. Z. Yang, and P. F. Gu "Space Radiation Damage in ZnO Induced by Subthreshold Electrons: Defect Identity and Optical Degradation," Radiation Research 176(2), 264-268, (1 June 2011). https://doi.org/10.1667/RR2518.1

Received: 1 December 2010; Accepted: 1 April 2011; Published: 1 June 2011

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