Research progress of intrinsic polymer dielectrics with high permittivity

Abstract

The high permittivity of polymer dielectrics facilitates their use in the electronics industry. Compared to inorganic ceramics and composites, intrinsic high permittivity polymer dielectrics have the advantages of easy solution processing and better homogeneity. The permittivity of common polymers is generally low, hence it would be worthwhile to explore avenues for augmenting the permittivity of polymer dielectrics via judicious and efficient structural design. The effective strategies used to increase the permittivity of intrinsic polymers encompass elevating local polarisabilities by fortifying electron delocalisation capabilities, exploiting ion pairs to generate atomic clusters with larger dipole moments, amplifying dipole density, augmenting dipole mobility, and so forth. Due to the rigidity and flexibility of the polymer backbone's decisive influence on the dielectric's all‐around performance, its selection also requires a total consideration of the requirements of practical applications. This work provides an overview and a brief evaluation of the dominant design strategies and mentions possible future design paradigms for polymer dielectrics.

Density Functional Theory-Based Approach For Dielectric Constant Estimation of Soluble Polyimide Insulators

“…48 The electronic polarization corresponds with the change rate of the electric field incorporated with polar groups into the polymer structures. 49 In particular, ε elec is theoretically limited as a function of the band gap as a sum over electronic transitions from occupied to unoccupied states. In contrast, ε ion that is determined by the infrared active zone center phonon modes exists without a band gap.…”

“…On the other hand, the polarizabilities of all the atoms and the van der Waals volume of the polymer chains have a significant impact on the value of ε elec . The electronic polarization corresponds with the change rate of the electric field incorporated with polar groups into the polymer structures . In particular, ε elec is theoretically limited as a function of the band gap as a sum over electronic transitions from occupied to unoccupied states.…”

Polyetherimide nanocomposites filled with in‐situ synthesised bismaleimide‐DDE@CCTO hybrid nanofibers enabling improved dielectric and interfacial performance

“…High-performance polymer-based dielectrics are receiving keen interests from researchers in fields of capacitors [1][2][3][4][5], 5G communications [6] and actuators [7] etc. Compared to ceramic-based dielectric materials, polymer-based dielectrics feature the advantages of various configurations, lightweight, high toughness, easy process ability [8][9][10][11][12][13][14][15].…”