A Class of Auxiliary Passivators for Polymer Dielectrics

High-electrical-strength polymer dielectrics are essential for advanced devices with high power and/or integration densities and film capacitors energy-storage densities. Key factors affecting the dielectric electrical strength deep-level defect states, which lead to electron hole accumulation. Numerous states charge accumulation in during operation, contributing local electric field distortion resulting flashover or breakdown. In this work, first-principles calculations experiments reveal that VH (i.e., H vacancies) molecular chain can create deep bandgap. RCl (R = Li, Na, K) be used passivating states. addition, passivation mechanisms analyzed. The cations passivate into shallow-level acceptor because dipole moment regulates state energy. anions donor by forming a stable covalent bond between carbon lone-pair electrons. This work supports design of high-electrical-strength dielectrics.