13th IKZ Summer School


The Summer school will be held in English language.

Due to the Covid-19 pandemic, this year‘s summer school will be held online.

The Summer School is a cooperation between the Leibniz-Institut für Kristallzüchtung (IKZ) and the Leibniz ScienceCampus „Growth and Fundamentals of Oxides for electronic applications“ (GraFOx). This project is performed in the framework of GraFOx, a Leibniz ScienceCampus partially funded by the Leibniz Association.

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Oxides for Electronic Applications

Lecture 1: "Electronic structure of wide bandgap oxides"

  • Chemical bonding of oxide crystals
  • Structural phases of gallium oxide family of semiconductors
  • Electronic bandstructure
  • Orbital characteristics and symmetries of band-edge and high energy bands
  • Brief discussion of dopants and defect states
  • Summary of electronic struture

Lecture 2: "Electronic and photonic properties"

  • Electron and phonon bandstructure
  • Optical properties
  • Carrier scattering mechanisms
  • Low-field electron mobilities, fundamental limits in bulk and 2DEGs
  • General transport coefficients: Electrical and thermal conductivity, Seebeck and Peltier coefficients
  • High-field transport: velocity saturation, impact ionization, and breakdown fields
  • Summary of electronic, photonic and thermal properties

Lecture 3: "Oxide electronics fundamentals"

  • Schottky junction
  • PN junction
  • MOS junction
  • Ohmic contacts
  • Breakdown mechanisms in each type of junctions
  • Speed of RF devices
  • Speed of power switching devices 

Lecture 4: "Ga2O3 electronics: state-of-the-art"

  • Schottky power diodes
  • Lateral and vertical power transistors
  • RF transistors
  • PN heterodiodes and their applications
  • Power density and thermal management
  • Considerations for devices under operation

The Summer School is addressed to employees of the Leibniz-Institut für Kristallzüchtung, but also students and PhDs from external institutes are welcome.

If you are interested in attending this year's Summer School please send an email to summer.schoolikz-berlin.de with details of your institution and position (e.g. student bachelor / master / specialisation, PhD, scientist...). Please note that the number of participants for the Summer School is limited to a maximum of 100 participants.

If you would like to present your scientific results as a poster during the Summer School, please submit an one page abstract with the registration.

The Summer School is free of charge.


Registration deadline: August 9th, 2021


Prof. Huili Grace Xing

Prof. Debdeep Jena


Stefanie Grüber
Phone: +49 30 6392 3263
Fax: +49-30-6392 3003

Monday, 16. August 2021, 2 - 4 pm
Intro / Welcome (15 min)
Lecture 1: "Electronic structure of wide bandgap oxides"

Monday, 16. August 2021, 4 - 6 pm
Lecture 2: "Electronic and photonic properties"

Tuesday, 17. August 2021, 2 - 4 pm
Lecture 3: "Oxide electronics fundamentals"

Tuesday, 17. August 2021, 4 - 6 pm
Poster Session with break out rooms

Wednesday, 18. August 2021, 2 - 4 pm
Lecture 4: "Ga2O3 electronics: state-of-the-art"

Wednesday, 18. August 2021, 4 - 6 pm
Roundtable Discussion

Huili (Grace) Xing
is the William L. Quackenbush Professor of Electrical and Computer Engineering at Cornell University where she holds a joint appointment in the School of Electrical and Computer Engineering and the Department of Materials Science and Engineering.

Debdeep Jena
is the Richard E. Lunquist Sesquicentennial Faculty Fellow, Professor at Cornell University where he holds a joint appointment in the School of Electrical and Computer Engineering and the Department of Materials Science and Engineering.

The central research theme in the Jena-Xing Laboratory is to develop electronic grade semiconductors and understand the fundamental limits of these materials and their applications. The essential scientific tools the group uses include epitaxy, basic material characterizations, transport theory and experiments, device theory and experiments.

The current research of the Semiconductor Group can be loosely grouped into the following areas: AlN, BN, Ga2O3, other nitrides and oxides such as superconductors, ferroelectrics and magnetics, in terms of mateirals; milimeter-wave electronics, power electronics, light emitting devices, DUV, non-linear optical properties in engineered materials, memory in terms of applications.