Fig. 2: Mechanism to the suppression of electrical conduction. | Nature Communications

Fig. 2: Mechanism to the suppression of electrical conduction.

From: Polymer/molecular semiconductor all-organic composites for high-temperature dielectric energy storage

Fig. 2

a Schematic diagram of the KPFM testing. The circuit is used for charge injection prior to the measurement, and is disconnected during the measurement. b Topography of the PEI/PCBM composite. c Surface potential mapping of the PEI/PCBM composite. d Surface potential profiles along the horizontal axis derived from the surface potential mappings (c and Supplementary Fig. 14b). The amplitude of surface potential is averaged along the y direction in the surface potential mappings. The subtraction (red curve) of surface potential between the pristine PEI and the PEI/PCBM composite excludes the influence of the different energy levels between the electrode and the polymer. e Schematic illustration of the built-in electric field formed by the molecular semiconductor captured electrons. f Current density as a function of applied electric field of the pristine PEI, the all-organic composites and the PEI/BNNS nanocomposite measured at 200 °C. g Arrhenius function of conductivity for the pristine PEI, the all-organic composites and the PEI/BNNS nanocomposite measured at the applied electric field of 300 MV m−1.

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