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Wide band gap (WBG) materials: theory, growth, characterization, and applications

WBG materials are the subject of intensive research motivated by attractive electrical properties making them promising for electronic applications. The symposium is designed to exchange recent advances in the field of growth, characterization, material properties, theoretical predictions, device fabrication, and system applications.


Wide bandgap (WBG) materials such as Ga2O3, MgO, ZnO, TiO2, and high-k oxides, like ZrO2 and HfO2, have attracted much attention due to their emerging application as an active layer in thin film transistors, light-emitting diodes in the ultraviolet region and as transparent electrodes. The ability to control the physicochemical properties by controlling crystallographic structure, arrangement of atoms inside sample's volume and along the surface, taking into account point defects, is of crucial importance from both fundamental and applied research points of view. Detailed information on electronic and optical properties of bulk, films, nano-objects (like nanowires, nanorods, quantum dots, heterostructures etc.) including interfaces and their structure-property relationships is helping us to construct the informational bridge between the structural and electronic properties of materials.

The two major goals of the proposed symposium are to:

  • become a forum for exchanging information and ideas between technologists and materials scientists, as well as experimentalists and theoreticians;
  • provide an overview and establish the current state-of-the-art in applications of such materials.

The presentations will aim to cover the topics:

  • synthesis and crystal growth of bulk and low-dimensional materials;
  • band structure and lattice defects in crystal and heterostructures;
  • optical, mechanical and thermal properties;
  • electrical properties: doping technology, mobility of electrons and holes;
  • properties of interface processes studied in situ: (chemical synthesis reactions, phase transitions, catalytic processes).
  • dynamical properties: charge transfer, chemical reactions, etc.
  • theoretical modelling and prediction of properties using, e.g., ab initio and machine learning.
  • fundamental properties of optical, ultraviolet, electronic devices based on mentioned above materials.

Prospective applications of the WBG materials in various industrial sectors will be discussed, e.g.:

  • high-performance optoelectronic, ultraviolet and electronic devices.
  • high-k oxides based memories
  • sustainable energy and solid-state lighting.
  • catalysis.
  • applications in biology and medicine.

Hot topics to be covered by the symposium:

  • Novel nano-heterostructure materials and related functional devices.
  • Advanced characterization methods of WBG based materials.
  • Novel energy and bio-materials based on WBG materials.
  • ‘Structure – property’ relationship in WBG based materials.
  • Interface structure of WBG based materials and properties processes studied in situ.
  • High-performance optoelectronic devices.

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Symposium organizers
Elżbieta GUZIEWICZInstitute of Physics - PAS

Al. Lotnikow 32 /46 , PL - 02668 Warsaw, Poland

(SMT-ETRC), Rudolf-Eber-Str. 2, 73447 Oberkochen, Germany
Iraida N. DEMCHENKOWarsaw University

Department of Chemistry, ul. Pasteura 1, 02-093 Warsaw, Poland
Wladyslaw WALUKIEWICZUniversity of California

Lawrence Berkeley National Laboratory, Department of Materials Science and Engineering Mailstop 2R0200, 1 Cyclotron Road, Berkeley, CA 94720 USA
Yevgen MELIKHOVCardiff University

School of Engineering, Queens Bldg., The Parade, Cardiff, CF24 3AA, Wales, United Kingdom