Overcoming the efficiency limitation of semiconductor quantum dot-based light-emitting diodes

Informacje na temat projektu

CQWLED

Identyfikator umowy o grant: 849229

DOI

10.3030/849229

Projekt został zamknięty

Data podpisania przez KE 11 Września 2019

Data rozpoczęcia 1 Stycznia 2020

Data zakończenia 31 Grudnia 2024

Finansowanie w ramach

• EXCELLENT SCIENCE - European Research Council (ERC)

Koszt całkowity

€ 1 498 515,00

Wkład UE

€ 1 498 515,00

Koordynowany przez

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
Switzerland

Periodic Reporting for period 4 - CQWLED (Overcoming the efficiency limitation of semiconductor quantum dot-based light-emitting diodes)

Okres sprawozdawczy: 2024-07-01 do 2024-12-31

Podsumowanie kontekstu i ogólnych celów projektu

This project aims to understand and engineer light generation and propagation from semiconductor nanocrystals, so that more light can be directed to human eyes in their electroluminescent devices, which covert electricity to light.
It is important to society because there is high demand to use better light source with reduction of blue light that is harmful for human eyes. Light generated from semiconductor nanocrystals is not only potentially more eco-friendly and sustainable, but also generating color-pure light for different applications, significantly reduce the use of blue spectral component in light.
The overall objectives are therefore about fundamental understanding light generation within the semiconductor nanocrystals and how the geometry and electronic structure affects light propagation. Given the fundamental insights gained, we aim to design process and materials for making the light emitting devices that yield color-pure light with highest energy conversion efficiency.

Prace wykonane od początku projektu do końca okresu sprawozdawczego oraz najważniejsze dotychczasowe rezultaty

In combination with multiscale modeling and spectroscopy, we have developed theoretical framework allowing us to predict light propagation in a given semiconductor nanocrystal. We have synthesized semiconductor nanocrystals with chemistry and shape guided by our calculations. The resulting LED devices demonstrate the record-high energy conversion efficiency.

Innowacyjność oraz oczekiwany potencjalny wpływ (w tym dotychczasowe znaczenie społeczno-gospodarcze i szersze implikacje społeczne projektu)

As compared to state-of-the-art semiconductor nanocrystal light-emitting diodes, we have boosted the maximum energy conversion efficiency over 25%.
We anticipate that further optimization of our synthetic protocols would allow us to fabricate lighting devices with longer lifetime without compromising energy conversion efficiency. The use of more environmentally friendly materials would be also investigated and expected to considerably reduce the content of heavy and rare elements.

The most color-pure green light-emitting diodes using semiconductor nanocrystals