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Title: Great reduction of loss at high electric field in the polyvinylidene fluoride/aromatic polythiourea blend films along with an irreversible phase transition

In this paper, the polarization response of dielectric blend based on the polyvinylidene fluoride (PVDF) and aromatic polythiourea (ArPTU) was investigated. It is found that the conduction loss at high field has been reduced 2–4 times along with an interesting irreversible transition under high electric field. The loss at 700 MV/m can be kept below 20%, which is better than most other polar dielectric polymers. It is proved that the transition is a phase change from glass phase to polar β phase at a critical field. And the highly polar thiourea groups of ArPTU can act as traps for the electrons, reduce conduction loss greatly and prevent dielectric breakdown by stabilizing the electron energy.
Authors:
; ; ; ; ;  [1]
  1. Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211 (China)
Publication Date:
OSTI Identifier:
22420260
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRIC FIELDS; FILMS; ORGANIC FLUORINE COMPOUNDS; PHASE TRANSFORMATIONS; POLARIZATION; POLYVINYLS; THIOUREA