Abstract A method is proposed for increasing the radiation resistance of semiconductor crystals (AlxGa1-x)2O3, which are promising for creating power electronics and optoelectronic devices for spacecraft performing tasks in near-earth orbits. The effect of the aluminum content on the bandgap in (AlxGa1-x)2O3 single crystals grown from a melt by the Czochralski method is investigated. The necessary conditions for the formation of a high-quality seed and subsequent growth of single crystals are achieved by setting temperature gradients at each successive stage of growth. The results of energy-dispersive X-ray spectroscopy analysis and optical transmission spectra of (AlxGa1-x)2O3 crystals with an aluminum content from 0 to 7.32% are presented. It is shown that an increase in the aluminum content leads to a monotonic increase in the bandgap from 4.7 eV to 5.0 eV, which provides an increase in radiation resistance.

    Highlights Aluminum content increase leads to the bandgap enlargement of (AlxGa1-x)2O3 crystals. Bandgap enlargement of the semiconductor material enhances radiation resistance of the one. Radiation robust wide-bandgap semiconductor materials can be utilized for space applications. Czochralski method grown bulk (AlxGa1-x)2O3 crystals purity depends on temperature gradients at each successive growth stage.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    On improving the radiation resistance of gallium oxide for space applications


    Contributors:

    Published in:

    Acta Astronautica ; 180 ; 125-129


    Publication date :

    2020-12-05


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Gallium Nitride Microwave Devices for Space Applications

    Phillips, W. A. / Davies, R. / Jones, S. et al. | British Library Conference Proceedings | 2000



    Improving EW capabilities with gallium arsenide

    Komiak, J.J. / Helms, D. / Pepe, C.D. et al. | Tema Archive | 1989



    Improving radiation tolerance in space-borne electronics

    Holmes-Siedle, A. / Freeman, R.F.A. | Tema Archive | 1977