White Light-Emitting Diodes Based on Organometal Halide Perovskites

Descrizione del progetto

LED bianchi in perovskite in arrivo

Le perovskiti, note per il loro potenziale utilizzo nelle celle solari, risultano promettenti anche per la produzione di diodi a emissione luminosa (LED) ad alta efficienza. Sebbene siano stati compiuti progressi significativi nello sviluppo di LED monocromatici in perovskite, i LED bianchi in perovskite non sono ancora stati realizzati. Il progetto WLEP, finanziato dall’UE, prevede di produrre LED bianchi efficienti e stabili basati su fasi di Ruddlesden-Popper (RP) – un tipo di struttura in perovskite che consiste in lastre 2D simili a perovskite intrecciate con cationi. L’approccio del progetto alla produzione di pellicole sottili a LED bianchi di alta qualità si baserà anche sulla produzione additiva e sulle tecniche di post-trattamento. Il progetto aprirà la strada alla produzione efficiente e a basso costo di LED bianchi in perovskite che possono contribuire in modo significativo a ridurre il consumo energetico dell’illuminazione.

Obiettivo

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.