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Mingkun Li, Xueqia Zhang, Shuopei Jiao, et al. Recent advances in diamond MOSFETs with normally off characteristics[J]. Functional Diamond2024, 4(1).
Mingkun Li, Xueqia Zhang, Shuopei Jiao, et al. Recent advances in diamond MOSFETs with normally off characteristics[J]. Functional Diamond2024, 4(1). DOI: 10.1080/26941112.2024.2357654.
Diamond has superior physical and electronic properties and it is regarded as an ultimate material of power-electronics applications. Numerous studies have been focusing on the diamond-based power devices
especially on diamond metal-oxide-semiconductor field-effect transistors (MOSFETs). Due to the existence of two-dimensional hole gas (2DHG) layer on the hydrogen-terminated (H-) diamond surface
hole carriers with high density can be provided and thus H-diamond MOSFETs have been widely investigated
whereas they generally exhibit normally on properties. In recent years
many researchers have been devoting themselves to the development of diamond MOSFETs with normally off characteristics and good device performances. In this work
we summarized recent advances to achieve normally off features for diamond MOSFETs
including the partial surface modification or using some specific insulator materials on H-diamond surfaces
the oxidation of the silicon terminated (Si-) diamond
and the inversion-type p-channel diamond MOSFETs on hydroxyl terminated (OH-) diamond. In addition
we summarized their interface properties which mainly limited the device performances
and put forward to the possible approaches to improve the device performances and thus to promote their potential for power application.
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