guest ::
| Home > Publications database > AlGaN/GaN MISHEMTs with epitaxially grown GdScO 3 as high- κ dielectric |
| Home > Publications database > AlGaN/GaN MISHEMTs with epitaxially grown GdScO 3 as high- κ dielectric |
| Journal Article | FZJ-2021-04857 |
; ; ; ;
2021
American Inst. of Physics
Melville, NY
This record in other databases: 
Please use a persistent id in citations: http://hdl.handle.net/2128/29399 doi:10.1063/5.0037692
Abstract: Epitaxially grown GdScO3 was integrated in a GaN-based metal-insulator-semiconductor high electron mobility transistor as a high-κ gate passivation layer. Microstructural investigations using transmission electron microscopy and x-ray diffraction confirm the epitaxial growth of GdScO3 on GaN deposited by pulsed laser deposition on the AlGaN-GaN heterostructure. The metal-insulator-semiconductor high electron mobility transistor was compared to unpassivated and to Al2O3 passivated high electron mobility transistors. A layer of 20 nm GdScO3 reduces the gate leakage current below the level of the Al2O3 passivated transistors and below the off-current of the high electron mobility transistor without any gate dielectric. Time-dependent measurements show a strong dependence of the drain leakage current in the off-state on light illumination, which indicates slow trapping effects in GdScO3 or at the GdScO3–GaN interface.AlGaN/GaN high electron mobility transistors (HEMTs) have attracted a lot of interest over the last few years. Despite the excellent material properties of GaN, such as the high breakdown field, especially the formation of a two-dimensional electron gas (2DEG) at the AlGaN–GaN interface has motivated intensive studies. Due to spontaneous and piezoelectric polarization at the interface, the conduction band of GaN bends below the Fermi level and creates a highly conductive electron channel, which enables high frequency switching devices.1 Intensive studies have been conducted to improve the performance of AlGaN/GaN high electron mobility transistors (HEMTs) by implementing an additional dielectric layer underneath the gate in a so-called metal insulator high electron mobility transistor (MISHEMT).
; 
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz
; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
Fulltext by OpenAccess repository