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Marco orgánico covalente tridimensional altamente conjugado basado en espirobifluoreno para la mejora de células
Chenyu Wu1, Yamei Liu1, Hui Liu1
1Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering , Qingdao University of Science and Technology , Qingdao 266042 , China.
Journal of the American Chemical Society
|July 17, 2018
Resumen
Los nuevos marcos orgánicos covalentes tridimensionales (3D COF) mejoran la eficiencia de las células solares de perovskita y previenen las fugas. Estos COF 3D basados en espirobifluoreno ofrecen una mayor eficiencia y estabilidad en la conversión de potencia.
Área de la Ciencia:
- Ciencias de los materiales
- Química orgánica
- Energía renovable
Sus antecedentes:
- Las estructuras orgánicas covalentes (COF) son polímeros porosos cristalinos con propiedades sintonizables.
- Las células solares de perovskita (PSC) ofrecen altas eficiencias de conversión de energía, pero se enfrentan a desafíos de estabilidad.
- El desarrollo de nuevos materiales para mejorar el rendimiento y la estabilidad de las PSC es crucial.
Objetivo del estudio:
- Sintetizar y caracterizar los nuevos COF 3D basados en espirobifluoreno (SP-3D-COF).
- Investigar la aplicación de estos SP-3D-COF como sustancias dopantes en las PSC.
- Aclarar el mecanismo detrás de la mejora del rendimiento en las PSC.
Principales métodos:
- Síntesis de SP-3D-COF a través de la formación de enlaces iminos.
- Análisis cristalográfico mediante difracción de rayos X en polvo y simulación estructural.
- Fabricación y ensayo de PSC dopados con SP-3D-COF.
- Estudios experimentales y computacionales para comprender las interacciones materiales.
Principales resultados:
- Se han construido con éxito SP-3D-COF altamente conjugados con interpenetración de 6 o 7 veces.
- Los SP-3D-COF exhibieron una porosidad permanente y una alta estabilidad térmica.
- El dopaje de PSC con SP-3D-COF mejoró la eficiencia promedio de conversión de potencia hasta en un 18,0% y evitó fugas.
- Se propuso un mecanismo de interacción fotorresponsivo entre las perovskitas y los SP-3D-COF.
Conclusiones:
- Los SP-3D-COF son dopantes eficaces para mejorar el rendimiento de la PSC.
- La conjugación de entrelazamiento y la porosidad únicas de los SP-3D-COF contribuyen a mejorar la eficiencia y la estabilidad del dispositivo.
- La investigación adicional sobre las interacciones COF-perovskita puede conducir a tecnologías de celdas solares de próxima generación.
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