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Diodos orgánicos emisores de luz ultravioleta de alto rendimiento habilitados por emisores de benzo[m] tetrafeno

Guijie Li¹, Kewei Xu¹, Jianbing Zheng¹

¹College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, P. R. China.

Journal of the American Chemical Society

|January 4, 2024

Resumen

Los investigadores desarrollaron nuevos hidrocarburos aromáticos policíclicos funcionalizados con boro y oxígeno (BO-PAH) para diodos orgánicos emisores de luz ultravioleta (UV OLED). Estos nuevos emisores ofrecen una alta eficiencia y pureza de color, abordando un desafío clave en la tecnología UV OLED.

Área de la Ciencia:

Ciencias de los materiales
Productos electrónicos orgánicos
La fotoquímica

Sus antecedentes:

Los diodos orgánicos emisores de luz ultravioleta (OLED UV) son cruciales para la salud, la industria y la agricultura.
El desarrollo de los OLED UV está limitado por la falta de emisores UV eficientes y estables.

Objetivo del estudio:

Diseñar y sintetizar nuevos emisores para los OLED UV.
Investigar las propiedades fotofísicas de nuevos materiales.
Para fabricar y caracterizar los dispositivos OLED UV.

Principales métodos:

La incorporación de unidades dobles de boro y oxígeno en hidrocarburos aromáticos policíclicos no lineales (BO-PAH).
Síntesis de los emisores de BO-bifenilo (BO-bPh) y de BO-naftilo (BO-Nap) en espiral.
Las mediciones de fotoluminiscencia y electroluminiscencia.
Fabricación de un dispositivo OLED UV basado en BO-bPh.

Principales resultados:

Los emisores BO-bPh y BO-Nap exhiben una fuerte fotoluminiscencia UV y azul violeta con altas eficiencias cuánticas (98-99%).
Los emisores poseen características híbridas locales y de transferencia de carga (HLCT).
Un OLED basado en BO-bPh demostró una electroluminiscencia UV de alta pureza de color (394 nm) y una eficiencia cuántica externa máxima récord (EQE) del 11,3% a través de la utilización de excitones calientes.

Conclusiones:

Los BO-PAH dobles son emisores robustos prometedores para aplicaciones OLED UV avanzadas.
Los emisores desarrollados ofrecen una solución viable a la escasez de emisores UV eficientes.
Este trabajo allana el camino para la próxima generación de dispositivos optoelectrónicos UV.

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