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Updated: Jun 26, 2025
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Emisión de excitones autoatrapados en perovskitas híbridas de amonio/hidrónio altamente polares desencadenadas por el
Bo Zhou1, Feier Fang1, Zexiang Liu2
1School of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China.
Journal of the American Chemical Society
|May 14, 2024
Resumen
Las nuevas perovskitas basadas en hidrónio muestran doble emisión. El dopaje con Sb3 + crea una luz verde amarillenta y roja eficiente, destacando la polaridad de la celosía
Área de la Ciencia:
- Ciencias de los materiales
- Química del estado sólido
- La fotofísica
Sus antecedentes:
- Los cationes monovalentes son comunes en las perovskitas de halogenuros metálicos.
- Las perovskitas con cationes de sitio A altamente polares están poco exploradas.
Objetivo del estudio:
- Introducir una nueva perovskita híbrida 0D utilizando cationes polares de hidrónio.
- Investigar el efecto del dopaje de Sb3+ en las propiedades ópticas.
Principales métodos:
- Síntesis de cristales simples de 0D (NH4) y 3OH3-InCl6.
- Espectroscopia de fotoluminiscencia para el análisis de las propiedades de emisión.
- Investigar el papel de la polaridad de la red y el dopaje de Sb3+.
Principales resultados:
- Se han logrado emisiones duales de banda ancha de color verde amarillento (550 nm) y rojo (630 nm).
- El rendimiento cuántico de fotoluminiscencia (PLQY) alcanzó el 86%.
- El dopaje de Sb3+ condujo a una doble emisión debido a distintos entornos de polarización en la red.
Conclusiones:
- La polaridad del enrejado influye significativamente en la emisión de excitones autoatrapados en perovskitas dopadas con Sb3+.
- La polaridad contribuye hasta un 25% de la energía de desplazamiento de Stokes, complementando la deformación de Jahn-Teller.
- Las perovskitas dopadas con Sb3+ ofrecen una emisión de banda ancha ajustable, siendo la polaridad de la celosía un factor clave.
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