WLEP · White Light-Emitting Diodes Based on Organometal Halide Perovskites
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2021-09-01 → 2024-08-30
- EU contribution
- €203,852
- Participants
- 1
- Scheme
- MSCA-IF
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Results in brief
White Light-Emitting Diodes Based on Organometal Halide Perovskites
This project aims to solve one of the most important issues in the perovskite LED field, namely the lack of high-performance white perovskite LEDs. To tackle this issue, we systematically investigated the impacts of the lattice strain on the stability and efficiency of perovskite LEDs. Through the cation tailing strategy, a minimum lattice strain in perovskite film was achieved, which consequently resulted in a high-efficiency perovskite LED with a significantly improved device lifetime (T70) to 151 h and a peak external quantum efficiency (EQE) of 18.2%. We also studied the limiting factors of photoluminescence quantum yields (PLQYs) in blue perovskite LEDs and proposed a two-step mechanism involving exciton dissociation and electron–phonon interaction to explain the thermal quenching behavior in blue perovskite films. Ultimately, we successfully fabricated the first white perovskite LED based on two-dimensional tin perovskites.
Data: CORDIS, © European Union
Project objective
Recently, perovskite light-emitting diodes (LEDs) have emerged as a new generation of efficient and low-cost LED technology because of their unique optoelectronic properties. Although great advances and exciting progress have been achieved in monochromatic perovskite LEDs, no white perovskite LED has been reported yet.This project targets the development of new white light-emitting perovskite (WLEP) emitters and high-performance white perovskite LEDs. Recent progress on Ruddlesden-Popper perovskites (RPPs) suggests a promising way for realizing WLEP thin films for high performance white LEDs. Therefore, in this project, I aim to develop efficient and stable white perovskite LEDs based on RPP thin films. Firstly, novel WLEP materials will be developed by using a strategy combining mixed A-site cations and rigid large organic cations. Secondly, high-quality WLEP thin films will be prepared through ‘cocktail’ approach-based additive engineering or/and post treatments. Ultimately, efficient and stable white perovskite LEDs will be fabricated by coupling new device architectures, device engineering and device physics. Also, the fellow will be trained to acquire new interdisciplinary knowledge and skills and to achieve professional maturity by implementing the project.The expected results of this project will considerably advance the research field of perovskite LEDs, consequently promoting the academic reputation of the host organization, ensuring EU’s dominant role in the research field of perovskite optoelectronics and enhancing the international impact of EU. Meanwhile, the expected outcomes are new WLEP materials and white perovskite LEDs which have great potential for commercialization. In the long term, commercialization of efficient and low-cost white perovskite LEDs will reduce energy consumption of lighting, helping reach EU’s energy saving targets, and can also generate economic growth and new job opportunities.
Original text from CORDIS.
Participants
- LINKOPINGS UNIVERSITET · LinkopingCoordinatorSweden
Links
Data: CORDIS, © European Union