کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1663980 | 1517998 | 2016 | 4 صفحه PDF | دانلود رایگان |
• The leakage current mechanisms of Al/Tm2O3/Si stack structures were extracted.
• The conduction mechanisms are Schottky emission and Frenkel-Poole conduction.
• The barrier height for Pt/Tm2O3 and Al/Tm2O3 are 2.95 eV and 1.75 eV.
• The energy band diagrams of Pt (Al)/Tm2O3/Si capacitor were constructed.
Metal-oxide-semiconductor capacitors with Tm2O3 high-k gate dielectrics were fabricated. Based on the I–V measurements of Al/Tm2O3/Si devices at different temperatures, the leakage current mechanisms for Al/Tm2O3/Si stack structures have been extracted. The results reveal that the dominant conduction mechanisms under substrate injection and gate injection are Schottky emission and Frenkel-Poole conduction, respectively. The determined Schottky barrier height between Tm2O3 and Si is 1.68 ± 0.2 eV. The further I–V measurements of Fowler-Nordheim tunneling characteristics at 77 K is conducted to the conduction-band offset at the interfaces of Al/Tm2O3 and Pt/Tm2O3, which are 2.95 eV and 1.75 eV, respectively. The energy band diagrams of the Al (Pt)/Tm2O3/Si stack structures were obtained from the above results, which show that Tm2O3 is a promising candidate for use as high-k gate dielectric on high-performance substrates.
Journal: Thin Solid Films - Volume 611, 29 July 2016, Pages 52–55