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Película de nitruro de boro hexagonal a escala de obleas mediante la formación de granos autocolimados

Joo Song Lee^1,2, Soo Ho Choi³, Seok Joon Yun⁴

¹Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Wanju-Gun, 55324, Republic of Korea.

Science (New York, N.Y.)

|November 17, 2018

Resumen

Los investigadores sintetizaron películas de nitruro de boro hexagonal a escala de obleas utilizando deposición de vapor químico. Este avance supera los defectos en el hBN policristalino, allanando el camino para dispositivos electrónicos avanzados.

Área de la Ciencia:

Ciencias de los materiales
Física de la materia condensada
Nanotecnología

Sus antecedentes:

El nitruro de boro hexagonal policristalino (PC-hBN) tiene defectos y límites de grano.
Estas imperfecciones conducen a sitios de dispersión y trampa de carga, lo que dificulta las aplicaciones electrónicas de alto rendimiento.

Objetivo del estudio:

Desarrollar un método para la síntesis de películas monocristalinas de nitruro de boro hexagonal (SC-hBN) a escala de obleas.
Para superar las limitaciones de PC-hBN para dispositivos electrónicos avanzados.

Principales métodos:

Deposición de vapor químico (CVD) en un sustrato de oro líquido.
Utilizando la limitada solubilidad de boro y nitrógeno en oro líquido para promover la difusión de átomos.
Aprovechando las interacciones electrostáticas para la autocollimación de granos hexagonales de nitruro de boro.

Principales resultados:

Síntesis exitosa de películas monocapa SC-hBN a escala de obleas.
Formación de granos unimodal estrechamente empaquetados mediante autocollimación.
Síntesis demostrada de heteroestructuras de grafeno/hBN a escala de obleas y de disulfuro de tungsteno monocristalino.

Conclusiones:

El método CVD desarrollado permite la producción de películas SC-hBN de gran superficie.
Este avance proporciona una plataforma de materiales de alta calidad para la electrónica y las heterosestructuras de próxima generación.
La técnica es escalable y aplicable a otras síntesis de materiales 2D.

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