Fabrication of Silicon Nanowire Metal-Oxide-Semiconductor Capacitors with Al2O3/TiO2/Al2O3 Stacked Dielectric Films for the Application to Energy Storage Devices

نویسندگان

چکیده

Silicon nanowire (SiNW) metal-oxide-semiconductor (MOS) capacitors with Al2O3/TiO2/Al2O3 (ATA) stacked dielectric films were fabricated by metal-assisted chemical etching (MACE) and atomic layer deposition (ALD). High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) images revealed that SiNWs conformally coated ATA although the cross-sectional shapes of MACE-SiNWs non-uniform sharp spikes can be seen locally. The capacitance density 5.9 ?F/cm2 at V = ?4 perfect accumulation region was achieved due to combination large surface area SiNW array high constant ATA. changed exponentially voltage < ?4.3 84 successfully ?10 V. It not only 3D structure high-k material but also local nanostructure layers could contribute considerable capacitance.

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ژورنال

عنوان ژورنال: Energies

سال: 2021

ISSN: ['1996-1073']

DOI: https://doi.org/10.3390/en14154538