ZnO白漆的质子辐照损伤与光学性能退化机理

doi:10.3969/j.issn.1001-4381.2013.05.001

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Abstract S781 white paints were irradiated with 150-keV protons in a simulated space environment, in order to elucidate more definitely the irradiation damage and optical degradation mechanisms for ZnO-pigmented white paints. After proton irradiations, the degradation in spectral reflectance and solar absorptance was measured in situ. The interaction between the protons and S781 white paints, and the irradiation-induced defects, were also studied through simulations and photoluminescence. The results show that the zinc vacancies in the 1-charge state are due to the ionization of the ZnO pigments, and are responsible for the b band absorption and optical degradation. Furthermore, this work also supports the first-principles results of considering zinc vacancies as the defects responsible for the green luminescence band from ZnO.

Key words： space environment ZnO-pigmented white paint proton irradiation zinc vacancy

Received: 01 November 2012 Published: 20 May 2013

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http://jme.biam.ac.cn/EN/10.3969/j.issn.1001-4381.2013.05.001 OR http://jme.biam.ac.cn/EN/Y2013/V0/I5/1

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