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Una interfaz Nd@C82-polímero para las células solares de perovskita eficientes y estables

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Los investigadores desarrollaron una nueva interfaz magnético-polímero para las células solares de perovskita (PSC). Esta interfaz mejora la extracción de electrones y la estabilidad, logrando una alta eficiencia de conversión de potencia (PCE) y durabilidad para la comercialización.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Las instalaciones fotovoltaicas
  • Nanotecnología

Sus antecedentes:

  • La comercialización de las células solares de perovskita (CPS) requiere equilibrar la alta eficiencia de conversión de energía (ECP) y la estabilidad a largo plazo.
  • Las interfaces poliméricas pueden mejorar la durabilidad de las PSC al bloquear los factores ambientales y la migración de iones, pero pueden obstaculizar el rendimiento electrónico.
  • El logro de una extracción de carga eficiente y un encapsulado robusto es crucial para las PSC estables.

Objetivo del estudio:

  • Desarrollar una interfaz avanzada para las células solares de perovskita (PSC) que mejore simultáneamente la eficiencia de conversión de energía (PCE) y la estabilidad operativa.
  • Superar las limitaciones del blindaje electrónico de las interfaces de polímero en las PSC.
  • Mejorar la viabilidad comercial de las PSC mediante una mayor durabilidad y rendimiento.

Principales métodos:

  • Fabricación de una nueva capa de acoplamiento endodérmica de metal-fullereno (Nd@C82).
  • Integración de la capa de polímero Nd@C82 como una interfaz en las células solares de perovskita (PSC).
  • Caracterización de la dinámica de extracción de electrones, interdifusión de iones, eficiencia de conversión de potencia (PCE) y estabilidad operativa a largo plazo en condiciones de envejecimiento acelerado.

Principales resultados:

  • La capa de acoplamiento de polímero Nd@C82 demostró una extracción de electrones ultrarrápida y una encapsulación efectiva in situ.
  • Las células solares de perovskita (PSC) que incorporan esta capa alcanzaron un PCE del 26,78% (certificado del 26,29%) para dispositivos de pequeña superficie y del 23,08% para módulos de 16 cm2.
  • Los dispositivos no encapsulados mantuvieron el 82% de su PCE inicial después de 2.500 horas de funcionamiento continuo a 65°C bajo una iluminación solar.

Conclusiones:

  • La interfaz magnética endohedral metal-fullereno desarrollada mejora significativamente tanto la eficiencia de conversión de energía (PCE) como la estabilidad de las células solares de perovskita (PSC).
  • Este enfoque aborda efectivamente la compensación entre el rendimiento electrónico y la durabilidad en las PSC.
  • Los hallazgos allanan el camino para la comercialización de células solares de perovskita (PSC) altamente eficientes y estables.