White Light-Emitting Diodes Based on Organometal Halide Perovskites

Descripción del proyecto

Ledes blancos de perovskita en camino

La perovskita, conocida por su potencial uso en celdas fotovoltaicas, también son prometedoras para la fabricación de diodos emisores de luz (ledes) de alta eficiencia. Aunque se han logrado avances importantes en el desarrollo de ledes monocromáticos de perovskita, aún no se ha logrado crear ledes blancos de perovskita. El proyecto WLEP, financiado con fondos europeos, planea producir ledes blancos eficientes y estables basados en fases de Ruddlesden-Popper (RP), un tipo de estructura de perovskita que consiste en losas bidimensionales similares a la perovskita intercaladas con cationes. El método del proyecto para producir películas delgadas de ledes blancos de alta calidad también se basará en la fabricación por adición y en técnicas de postratamiento. El proyecto allanará el camino para la producción eficiente y de bajo coste de ledes blancos de perovskita que pueden ayudar significativamente a reducir el consumo de energía de la iluminación.

Objetivo

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.