Journal
JOURNAL OF APPLIED PHYSICS
Volume 101, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2409280
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Doubly stacked layers of silicon nanocrystals (nc-ci) in amorphous silicon nitride (alpha-SiNx) dielectric have been fabricated by plasma enhanced chemical vapor deposition and subsequent high-emperature thermal annealing. Capacitance-voltage (C-V) nd current-voltage (I-V) measurements were used to investigate its charge trapping phenomena and confirmed the memory effects of the nc-Si, which exhibited capacitance hysteresis and asymmetric current peaks, respectively. This structure has realized a two-level charge storage by Fowler-Nordheim tunneling in high-field regime. While under low field, the resonant tunneling of holes into stacked nc-Si was responsible for current peaks. The transport property of stacked nc-Si was discussed and a model was put forward to explain the retention mechanism. (c) 2007 American Institute of Physics.
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