HEXAGONAL BORON NITRIDE SHEET, METHOD OF PREPARING THE HEXAGONAL BORON NITRIDE SHEET, AND ELECTRONIC DEVICE INCLUDING THE HEXAGONAL BORON NITRIDE SHEET

摘要

A hexagonal boron nitride sheet having: a two-dimensional planar structure with a sp² B—N covalent bond, a Van der Waals bond between boron-nitrogen layers, a root mean square surface roughness of about 2 nanometers or less, and a length of about 1 millimeter or greater.