H2020Индивидуална стипендия2021–2023

LED4Nature · High Performance Environmentally Benign Quantum Dot@Perovskite Hybrid Materials for Near-IR LED: Design, Photodynamic Behaviour to Device Fabrication

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

Период: 2021-02-03 → 2023-02-02
Финансиране от ЕС: 172 932 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Хибридни материали от квантови точки и перовскити на база манган се тестват за създаване на светодиоди в близкия инфрачервен спектър. Те могат да заменят токсичните материали с олово, като подобрят стабилността и намалят вредата за околната среда.

Този кратък обзор е генериран от изкуствен интелект

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

Резултати накратко

High Performance Environmentally Benign Quantum Dot@Perovskite Hybrid Materials for Near-IR LED: Design, Photodynamic Behaviour to Device Fabrication

European Union in 2003 released “Directive on the restriction of the use of certain hazardous substances containing lead in electrical and electronic equipment,” which demanded lead-free in electrical and electronic equipment. Thus, developing environmentally benign lead-free halide perovskites and perovskite analogue materials with excellent optical and optoelectronic properties is urgent and essential. In order to understand lead-free halide perovskites, it is essential to know their exceptional properties for light emission. The defect tolerance, bandgap type, and exciton dynamics are several key factors. Pb based metal halide perovskites have already been proved to be super-efficient as absorber layer in LEDs but the studies of the applications in lead-free perovskite LEDs are still lacking behind. Due to the poor film-forming property and the mismatched energy levels with the hole transport materials (HTMs) and electron trans-port materials (ETMs), the maximum EQE of lead-free perovskite LEDs is just 5%,34which is much lower than their lead-based counterparts. To promote the development of lead-free perovskite LEDs we will work on Mn(II) based perovskites. LED4Nature was planned to tackle, through the design of novel materials combining the strong luminescence of quantum dots (QDs) with the long-range carrier transport of metal halide perovskites (PS), bringing novel hybrids QD@2D-PS exhibiting improved stability and reduced environmental-toxicity (no lead content), and being potential alternatives to current near-infrared LEDs.

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

Цел на проекта

In line with the European Energy Strategy on H2020, intensified research on the development of more-efficient and cost-effective light emitting diodes (LEDs) is required. In this regard solution processable colloidal quantum dots (QDs) and metal halide perovskites (PS) showed excellent proficiency to realize effective devices with low fabrication cost on large-area and light-weight substrates. Despite the high potentiality of developing advanced LEDs by exploiting the combination of PS and QDs, the investigation of the interactions of both materials is still in its early stage; and much is yet to be discovered regarding the charge-transport dynamics, mobilities, and defect states in different compositions of these hybrid materials. Our project's research objectives address this crucial issue and focus on designing novel, lead-free, QD@2D-PS hybrids, optimize their composition through studying their electro-optical properties, and finally characterize their performance in LED devices. The project (LED4Nature) will provide detailed knowledge about the effectiveness of Sn based 2D PS as a matrix for lead-free near-IR emitting QDs, and understanding of the effect of structural modifications (QD size, shell thickness, and PS's cation) on their spatially- and temporally- resolved photo-induced phenomena by time-resolved transient absorption and femtosecond terahertz spectroscopy, along with fluorescence lifetime imaging microscopy. Such information will be essential for the optimization and acceleration in the development of LED devices based on these hybrid materials which will be achieved through planned secondments to an expert group- and is expected to have significant industrial and socio-economic impacts. Comprehension of such multidisciplinary project will not only provide the fellow excellent research training, but will also provide a skill-set of transferable skills which will improve and diversify the fellow's future employment perspectives.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSIDAD DE CASTILLA - LA MANCHA · Ciudad RealКоординаторИспания