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Influencia de las nanohojas de nitruro de carbono modificadas con tiazol con propiedades electrónicas factibles en
Daniel Cruz1, Jose Garcia Cerrillo2, Baris Kumru1
1Department of Colloid Chemistry , Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1 , 14476 Potsdam , Germany.
Journal of the American Chemical Society
|July 17, 2019
Resumen
Los investigadores desarrollaron un nuevo nitruro de carbono modificado por tiazol como una capa de transporte de electrones sin metal (ETL) para las células solares de perovskita. Este material mejora el rendimiento al suprimir la recombinación de cargas, mejorando la eficiencia y la estabilidad.
Área de la Ciencia:
- Ciencias de los materiales
- Energía renovable
- Nanotecnología
Sus antecedentes:
- Las capas transportadoras de electrones (ETL) son cruciales para la extracción eficiente de la carga en los dispositivos electrónicos.
- Las células solares de perovskita requieren capas interfaciales estables, rentables y de alto rendimiento para su viabilidad comercial.
- Los ETL existentes a menudo se enfrentan a desafíos relacionados con el procesamiento, el costo o la estabilidad.
Objetivo del estudio:
- Desarrollar una vía sintética fácil para una nueva capa transportadora de electrones (ETL) sin metal.
- Investigar la eficacia de las nanohojas de nitruro de carbono modificadas con tiazol como ETL en las células solares de perovskita invertida.
- Mejorar el rendimiento y la estabilidad de las células solares de perovskita mediante la mejora de la dinámica de carga interfacial.
Principales métodos:
- Síntesis de nitruro de carbono modificado con tiazol en nanohojas de 1,5 nm de espesor.
- Fabricación de células solares de perovskita invertida utilizando el material sintetizado como un ETL homogéneo y libre de metales.
- Caracterización de las propiedades electrónicas del material y el rendimiento del dispositivo, incluido el voltaje de circuito abierto (Voc) y la densidad de corriente de cortocircuito (Jsc).
Principales resultados:
- Se obtiene una alta tensión de circuito abierto (Voc) de 1,09 V y una densidad de corriente de cortocircuito (Jsc) de 20,17 mA/cm2.
- Se ha demostrado una supresión efectiva de la recombinación de cargas en la interfaz perovskita/ETL.
- Confirmó la idoneidad del material como ETL sin metal procesable en solución para la extracción eficiente de cargas.
Conclusiones:
- Las nanohojas de nitruro de carbono modificadas con tiazol representan un material prometedor para capas avanzadas de transporte de electrones.
- Esta estructura basada en nitruro de carbono aumenta significativamente la extracción de carga en las células solares de perovskita p-i-n.
- El material desarrollado ofrece un camino hacia una tecnología de células solares de perovskita más eficiente, estable y rentable.
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