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Characterization and mobility analysis of MoO3-gated diamond MOSFET

MetadataDetails
Publication Date2017-09-01
JournalJapanese Journal of Applied Physics
AuthorsJinfeng Zhang, Zeyang Ren, Jincheng Zhang, Chun-fu Zhang, Da-zheng Chen
InstitutionsXidian University
Citations16

A MoO3-gated diamond metal-oxide-semiconductor field effect transistor (MOSFET) with a gate length of 40 µm was characterized. Analysis of the flat band voltage shift from the capacitance-voltage hysteresis shows quite high density of the fixed charge presents in the MoO3 layer (1.67 Ɨ 1012 cmāˆ’2), but the density of the traps brought by MoO3 layer is fairly low (1.35 Ɨ 1011 cmāˆ’2). The gate voltage dependence of the effective hole mobility was extracted and fitted by the empirical relation widely used in the silicon MOS channel. The resulting low-field mobility without vertical field degradation and the mobility degradation factor are 699 cm2/(VĀ·s) and 1.13, respectively.