Metal/BaTiO3/β-Ga2O3 dielectric heterojunction diode with 5.7 MV/cm breakdown field
Abstract
Wide and ultrawide bandgap semiconductors can provide excellent performance due to their high energy bandgap, which leads to breakdown electric fields that are more than an order of magnitude higher than conventional silicon electronics. In materials where p-type doping is not available, achieving this high breakdown field in a vertical diode or transistor is very challenging. We propose and demonstrate the use of dielectric heterojunctions that use extreme permittivity materials to achieve a high breakdown field in a unipolar device. We demonstrate the integration of a high permittivity material BaTiO3 with n-type β-Ga2O3 to enable a 5.7 MV/cm average electric field and a 7 MV/cm peak electric field at the device edge while maintaining forward conduction with relatively low on-resistance and voltage loss. The proposed dielectric heterojunction could enable improved design strategies to achieve theoretical device performance limits in wide and ultrawide bandgap semiconductors where bipolar doping is challenging.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 16, 2019
- Source ID
- 10.1063/1.5130669
Entities
People
- Aaron R. Arehart
- Aidan J. Lee
- Caiyu Wang
- Fengyuan Yang
- Hareesh Chandrasekar
- Joe F. McGlone
- Nidhin Kurian Kalarickal
- Siddharth Rajan
- Steven A. Ringel
- Wyatt Moore
- Zhanbo Xia
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- Ohio State University