Charge collection efficiency of Pt vs. Mg contacts on semi-insulating GaAs

F. Dubecký,B. Zaťko,V. Kolesár,D. Kindl,P. Hubík, E. Gombia,M. Dubecký

Applied Surface Science（2019）

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摘要

•Comparison of Pt vs Mg-based contacts on semi-insulating GaAs.•Transport, alpha-particle charge collection efficiency, electronic structure modeling.•Vast differences between Pt and Mg-based (MgO) contacts on semi-insulating GaAs uncovered.•New high-quality ohmic contacts based on Mg show very low current at low as well as high bias.•Promise of new applications for semi-insulating GaAs diodes with Mg contacts, especially in radiation detector technology.

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关键词

Semi-insulating GaAs,Schottky barrier,Metal-semiconductor contact,Metal-oxide-semiconductor contact,Charge collection efficiency

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