Fig. 2From: Self-assembled wide bandgap nanocoatings enabled outstanding dielectric characteristics in the sandwich-like structure polymer compositesBreakdown strength test, DFT calculation and flashover voltage. Weibull distribution of breakdown strengths of uncoated and coated a PTFE, b BOPP. Density of state calculated by the HSE + SOC method for c the (001) surface of PTFE. d the (001) surface of BN. The Fermi level is set to 0. e Flashover voltage of coated and uncoated PTFEBack to article page