Creating and sharing knowledge for telecommunications

Defects responsible for the performance of GaN-based devices: LEDs, HEMTs

on 04-06-2019

... Alexander Ya Polyakov, National University of Science and Technology “MISiS”, Moscow

Date & time: Tuesday, June 4th, 15:00h
Location: Amphitheatre of the Instituto de Telecomunicações - Pólo de Aveiro, Building 19

Deep traps responsible for nonradiative recombination in GaN films, in green, blue, NUV LEDs, both as-grown and subjected to electron irradiation or to long time operation, will be discussed. Possibilities arising from nanopillar structures formation and interaction with localized surface plasmons will be described. Deep traps in the barriers and buffers of AlGaN/GaN, InAlN/GaN HEMTs giving rise to long-time gate and drain current transients will be analyzed, approaches to treatment of non-exponential current relaxations originating in variations of local electric field strength, local potential fluctuations will be described.

Short biography:
Since 2014 he is a Professor at the Department of Semiconductor Electronics and Physics of Semiconductors of the National University of Science and Technology “MISiS” in Moscow and Head of the laboratory "Wide-Bandgap Semiconductors and Devices" at this university. He is an author or co-author of more than 300 research papers, 2 monographs, multiple invited chapters in books on III-V semiconductors, and multiple review articles. His areas of expertise include deep traps in compound semiconductors, properties of heterojunctions and quantum wells, hydrogen passivation effects, radiation defects studies, interaction of III-N LEDs with localized surface plasmons. More Information..

5G for Smart Cities

on 19-10-2018

... This coming October 19, the P2020 project “MobiWise: from mobile sensing to mobility advising” is organizing a workshop entitled “5G for Smart Cities”, to be held at the Auditório do Departamento do Ambiente in the Aveiro University Campus.
The P2020 MobiWise project ( has been building a 5G platform that incorporates an access infrastructure, with sensors and vehicles, with the aim of improving urban mobility, both for its inhabitants as well as visitors.
The project interconnects the several fixed and mobile elements (such as cars, drones, moliceiros, bicycles, sensors), and uses all the possible information to improve the mobility of its users, through a network and a platform of services that support the deployment of the Internet of Things in a smart city.
MobiWise studies and integrates different types of technologies and networks in the same infrastructure with support for mobility, services and applications delivered through a distributed cloud, with virtualization explored through SDN and the dynamic management of information, resources and services.
The partners of this project are the Instituto de Telecomunicações (Aveiro and Porto), University of Aveiro, the Centro de Tecnologia Mecânica e Automação (TEMA), and the University of Coimbra (Centro de Informática e Sistemas - CISUC, e Centro de Matemática - CMUC).
The workshop panels will have representatives of the largest telecommunications operators in Portugal (MEO, NOS and Vodafone), as well as manufacturers, Siemens and Ericsson, and specialists in wireless networks such as Wavecom.
At the level of 5G verticals, from mobility to cities, there will be a panel with representatives from Bosch, Ceiia, CityBrain, Veniam, Nokia and IMT.
The members of the advisory board: R. Boutaba - Univ. Waterloo, N. Rouphail - Inst. Transportation Research and Education; P. Steenkiste - Carnegie Mellon Univ., P.
Kacsuk - MTA Sztaki; R. Russell - Founder and Former CTO Come; F. Araújo - C. Municipal Porto and F. Glineur- Univ. Catholique de Louvain, will also be present in this intermediate workshop for the project stakeholders.
More Information..