Toward Perovskite-based Electrically Pumped Laser via Facile Facet Engineering

Descripción del proyecto

Emisión espontánea amplificada y bombeada eléctricamente con perovskita

Los láseres de estado sólido se basan en medios de ganancia sólidos bombeados ópticamente, tales como materiales orgánicos, puntos cuánticos coloidales y perovskitas. Cada uno de esos tipos de medios se enfrenta a desafíos. Con el apoyo de las acciones Marie Skłodowska-Curie, el proyecto PELFE pretende superar dos retos actuales con la perovskita logrando la emisión espontánea amplificada (EEA) bombeada eléctricamente utilizando perovskita. Para ello, el proyecto llevará a cabo un estudio exhaustivo de las perovskitas para comprender mejor la correlación entre las composiciones y los umbrales de EEA. A continuación, el equipo maximizará las propiedades ópticas de los nanocristales de perovskita (PNC) mediante el grabado de la superficie y la reconstrucción de las facetas, para posteriormente implementar los PNC en los LED.

Objetivo

Beyound traditional III-V laser diodes, solution-processable solid-state lasing (SPSSL) has been in spotlight due to promising versatility and simplified fabrication for integration into various platforms.
Among the classes of optical gain media, organic materials, colloidal quantum dots (CQDs), and perovskites have been extensively explored. While organic materials have shown promise, challenges remain in addressing triplet and polaron losses. CQDs, on the other hand, have demonstrated significant progress in suppressing undesirable loss mechanisms. Perovskites, a rising material, present distinct advantages including ease of formation through room-temperature processes and remarkable optical properties (low threshold of ASE and continuous wave lasing).
However, two primary challenges face perovskite implementation. Firstly, there is a notable gap in fundamental studies, specifically in understanding the correlation between auger recombination and optical properties. Secondly, the soft-ionic nature of perovskites poses a challenge for surface shell modification, necessitating the development of suitable treatment methods.
The research aims to achieve electrically pumped amplified spontaneous emission through a comprehensive study of perovskites and the introduction of a novel modification strategy. The project encompasses three objectives: understanding the correlation between compositions and ASE thresholds, maximizing the optical properties of perovskite nanocrystals (PNCs) through surface etching and facet reconstruction, and implementing PNCs into LEDs with a focus on modulating Joule heating and introducing distributed bragg reflectors.
Overall, this research endeavors achieve worlds first electrically pumped ASE using perovskite, offering a promising avenue towards efficient, cost-effective, and widely applicable laser diode technology.