Electrical Conduction in Polymers

Recent advances in conjugated polymer energy storage

“…[49][50][51] Figure 2 illustrates this process for PT, which can be p-doped or n-doped. Doping creates radical cations or anions, also referred to as positive or negative polarons, respectively, which are delocalized along the polymer backbone and are a proposed mechanism for conductivity.…”

Fast soliton-like charge pulses in insulating polymers

“…[4][5][6][7] Localized intra-band states that act as charge traps are assumed to govern the macroscopic carrier mobility, with the dwell time in the traps determining the carrier mobility. 3 For the last 20 years it has been possible to quantitatively measure the space charge concentration within an insulator by means of pressure wave propagation (PWP) and pulsed electroacoustic (PEA) techniques [8][9][10][11][12] as a function of the time of application of the potential difference (or subsequent to its removal) and hence to determine directly the charge dynamics, thereby allowing a direct comparison of theoretical expectations with experimental data. Recently the time resolution of the PEA technique has been improved such that a complete profile of the space charge density can be obtained every 25 ms. 11,13,14 Application of the technique to miniature cables possessing a thickness of 1.5 mm of Cross-Linked-Polyethylene (XLPE) (Fig.…”

“…[1][2][3] The electrode contacts are nonohmic with an energy barrier for charge injection. At low fields (up to E $10 MV/m at 20 C in polyethylene) impurities supply a low concentration of carriers ($10 15 -10 16 m À3 ) as do the contact charge regions at the electrode interface.…”

Electrical resistivity and magnetoresistivity of protonic acid (h2SO4 and HCl)-doped polyaniline at low temperature

“…[1][2][3] The discovery of doped conjugated polymers with high conductivity has generated substantial interest in charge defects in polymers among chemists and physicists. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The synthesis and preparation of heavily doped conducting polymers have significantly reduced the structural disorder and, thus, the effect of such a disorder on the electrical-transport properties. [17][18][19] The transport properties of conducting polymers are determined mainly from the disorder-induced localization.…”