H2020Индивидуална стипендия2018–2020

NEXTLEDs · Chemical Engineering of Atomically-Flat Colloidal Quantum Wells for Next-Generation Light- Emitting Devices

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

Период: 2018-03-01 → 2020-02-29
Финансиране от ЕС: 187 420 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Колоидалните квантови кладенци се изследват като нов слой за светодиоди (LED), за да се постигне по-висока яркост и чистота на цветовете. Това помага за създаването на дисплеи с по-добро качество на изображението и по-ефективно излъчване на светлината.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

Chemical Engineering of Atomically-Flat Colloidal Quantum Wells for Next-Generation Light-Emitting Devices

The introduction of light-emitting diodes (LEDs) offering energy-efficient solutions has revolutionized the solid-state lighting and display technologies. With the widespread use of LEDs, the electricity consumption for lighting in Europe has significantly decreased from 19% in 2006 to below 15% in 2015, enabling saving 85 billion € annually together with the dramatically reduced carbon footprint. In addition to the energy efficiency, the paradigm shifts towards to the achievement of high colour quality for the next-generation display technologies. To meet these future demands, the NEXTLEDs project was dedicated to the development of solution-processable and high performance LEDs showing improved colour purity and brightness by using colloidal quantum wells (CQWs) as a novel light-emitting layer. As a new class of colloidal semiconductor nanocrystals (NCs), CQWs exhibit distinct electronic structure and optical properties compared to the commonly used organic and inorganic light-emitting materials in LEDs. Owing to their atomically-flat surfaces and well-defined vertical thicknesses, they possess the narrowest emission linewidth, giant oscillator strength and suppressed Auger recombination. In addition, the orientation of dipole moments in these atomically-flat CQWs enabled the observation of directional emission, which may help to overcome the theoretically limited light-outcoupling efficiency issue observed in the LEDs. With these appealing features, the effective utilization of CQWs in the LED architectures has hold great potential for the development of the high-performance LEDs with improved colour quality, increased brightness and enhanced outcoupling efficiency. To successfully achieve our goal in the NEXTLEDs project, we target the following objectives: - to develop advanced heterostructures of CQWs showing narrow emission linewidth together with the improved photoluminescence quantum yield (PLQY) and stability, - to control the assembly of the synthesized CQWs with desired configuration, - to design and fabricate CQW-LEDs exhibiting high efficiency and high colour quality.

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

Цел на проекта

The introduction of light-emitting diodes (LEDs) offering energy-efficient solutions has revolutionized the solid-state lighting and display technologies. With the widespread use of LEDs, the electricity consumption for lighting in Europe has significantly decreased from 19% in 2006 to below 15% in 2015, enabling saving 85 billion € annually together with the dramatically reduced carbon footprint. In addition to the energy efficiency, the paradigm shifts towards to the high colour quality lighting for the next-generation lighting technologies. To meet these future demands, NEXTLEDs project aims to develop low-cost and solution-processable LEDs exhibiting ultra-high performance with exceptionally high colour purity by using colloidal quantum wells as a novel light-emitting layer. These colloidal quantum wells, also known as colloidal nanoplatelets (NPLs), have recently arisen with their astonishing excitonic features. The narrowest emission linewidth, giant oscillator strength and suppressed Auger recombination are the key features of colloidal NPLs to achieve highly functional LEDs. In addition, the controlled assembly of these atomically-flat NPLs further enhance the light outcoupling efficiency from colloidal NPL LEDs to boost their efficiency, which is theoretically limited to ~20% for any kind of isotropic emitters. To achieve our overarching goal in this project, we aim to (i) systematically synthesize advanced heterostructures of colloidal NPLs by precisely engineering their surfaces and (ii) successfully integrate the assembled NPL films into carefully designed devices to achieve highly efficient LEDs showing exceptionally high colour purity. The findings of this project together with the proposed novel heterostructures of colloidal NPLs have hold great potential to be a game changer for the development of next-generation colloidal nanocrystals based optoelectronic devices, which may even challenge their widely used epitaxially-grown counterparts.

Оригинален текст от CORDIS (на английски).

Участници

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH · ZuerichКоординаторШвейцария