H2020Индивидуална стипендия2015–2017

NITRIDE-SRH · Energy losses in nitride light-emitting diodes

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2015-05-01 → 2017-01-31
Финансиране от ЕС: 114 432 €
Участници: 1
Схема: MSCA-IF-EF-RI

Линиите свързват координатора с партньорите.

Накратко на български

Нитридните светодиоди (LED) се анализират теоретично, за да се разбере как дефекти като примеси от преходни метали причиняват загуба на енергия. Това помага за подобряване на ефективността на светлинните източници чрез намаляване на енергийните загуби в материала.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Energy losses in nitride light-emitting diodes

Broadly, the project deals with the new generation of lighting sources, mainly light-emitting diodes (LEDs) based on the nitride family of semiconductors. More specifically, the focus of the project is non-radiative recombination in these devices. Despite huge recent breakthroughts, modern LEDs still do no reach their theoretical efficiencies, i.e., the fraction of electrical energy that is converted to light. A big part of this under-performance is due to energy losses in the material itself. The main purpose of Marie Sklodowska-Curie project is the theoretical investigation of defect-related nonradiative recombination (also called Shockley-Read-Hall recombination) in nitride (InGaN) LEDs. Theoretical investigations are crucial to understand defect-related nonradiative recombination in nitride light-emitting diodes, as experimental unambiguous identification of defects is notoriously difficult. During the project we were able to identify microscopic mechanisms by which non-radiative recombination occurs in these materials. Specifically, we found out that gallium vacancy complexes and transition metal impurities act as very detrimental defects. The results will help guiding experimental efforts for improving device efficiencies and achieving better solid state lighting solutions.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Light-emitting diodes (LEDs) are the future of lighting for general-purpose and industrial applications because of their potentially superior efficiencies. Group-III nitrides are the principal materials used to manufacture blue and green LEDs. However, they are still rather inefficient, despite a lot of research efforts. Increasing the efficiency and reducing the cost of LEDs is currently the question of paramount importance.Nonradiative recombination at lattice defects is one of the main causes of reduced efficiencies. Direct experiments to determine the cause of nonradiative recombination are nearly impossible. This clearly calls for accurate theoretical modelling of nonradiative recombination in group-III nitride devices. A first-principles model will not only yield new knowledge about energy losses in nitride LEDs, but will also provide new insights into ways to improve device efficiencies. This is the main goal of the current Marie Skłodowska-Curie project.The researcher, dr. Audrius Alkauskas, will be returning to Europe after 3.5 years in the USA. He will be employed in the Centre for Physical Sciences and Technology (FTMC), under the supervision of prof. Gintaras Valušis. During the project the researcher will become an independent group leader, and grow as a specialist in semiconductor physics via a close collaboration with his colleagues in Lithuania and abroad.

Оригинален текст от CORDIS (на английски).

Участници

VALSTYBINIS MOKSLINIU TYRIMU INSTITUTAS FIZINIU IR TECHNOLOGIJOS MOKSLU CENTRAS · VilniusКоординаторЛитва