Descripción del proyecto
Dispositivos optoelectrónicos de alta eficiencia basados en perovskitas
El proyecto HELD, financiado con fondos europeos, prevé diseñar heteroestructuras estables y muy luminiscentes basadas en perovskitas tolerantes a defectos e integrarlas en dispositivos optoelectrónicos de película delgada. Los dispositivos objetivo principales son los dispositivos electroluminiscentes planos azules y blancos, celdas fotovoltaicas de alta eficiencia y láseres bombeados eléctricamente. El equipo del proyecto empleará métodos de procesamiento compatibles con procesos industriales de gran superficie. El uso de materiales menos tóxicos, como el estaño, y de mezclas que contengan plata y bismuto permitirán reducir cantidad de plomo en la estructura de perovskita. Además, los métodos de deposición de vapor deberían favorecer la fabricación de perovskitas en heteroestructuras de múltiples capas. Se espera que esto aumente su estabilidad térmica y estructural y, lo más importante, su eficiencia de fotoluminiscencia.
Objetivo
We propose to engineer stable-highly luminescent heterostructures based on defect tolerant benign perovskites and their integration into efficient planar/thin film optoelectronic devices. Primary targeted devices are: blue and white planar electroluminescent devices, high efficiency solar cells and electrically pumped lasers.
We will use processing methods that are compatible with large area industrial processes, in particular focusing on vapour deposition using thermal sublimation of the perovskite precursors. The boundaries of this simple, scalable and economic coating method will be determined using an advanced real time in-situ optical monitoring system based on hyperspectral imaging. This tool will unveil the limits and processing conditions for the preparation of uniform and very thin (< 10 nm) crystalline thin-film semiconductors.
We will also attempt to replace the toxic lead in today’s most studied perovskite materials, by less toxic materials such as tin and silver/bismuth mixtures. Here vacuum based processing is beneficial in view of the limited air-stability and solubility of their pre-cursor salts.
Accurate vapour deposition methods will allow the fabrication of perovskites in multiple layered heterostructures (MLH) that passivate the perovskite crystal boundaries. This will increase their thermal and structural stability and above all their photoluminescence efficiency. With the sophisticated processing control, multiple quantum wells (MQWs) will be engineered. MQWs are promising for light-emitting devices, in particular for lasers.
The impact of the project is large on various fields ranging from processes, materials and device engineering, physics, and energy. High efficiency, planar LEDs and solar cells, can shift the energy landscape and strongly help to meet the worlds CO2 reduction targets. The demonstration of electrically pumped lasing in easily processed thin film semiconductors will generate so far un-available fields of science.
Ámbito científico
- natural scienceschemical sciencesinorganic chemistrytransition metals
- natural scienceschemical sciencesinorganic chemistrypost-transition metals
- engineering and technologymaterials engineeringcoating and films
- natural sciencesphysical scienceselectromagnetism and electronicssemiconductivity
- natural sciencesphysical sciencesopticslaser physics
Programa(s)
Régimen de financiación
ERC-ADG - Advanced GrantInstitución de acogida
46010 Valencia
España