ISSN:
0959-8103
Keywords:
space charge limited currents
;
Poole-Frenkel effect
;
Schottky effect
;
charge trapping
;
hopping
;
poly(methyl methacrylate)
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The dark conduction current in 100 μm thick pure and anthracene doped bimetallized poly(methyl methacrylate) (PMMA) foils was measured at temperatures ranging from 333 to 383 K and filds ranging from 8 to 50 kV/cm. An attempt was made to identify the nature of the current by comparing its observed dependence on electric field, temperature and dopant concentration with the respective characteristic features of the existing theories of electrical conduction. The observed characteristics suggest that the charge carriers are generated by field assisted lowering of coulombic barriers at the traps and are conducted through the bulk of the material by a hopping process between the localized states by a Jonscher-Ansari modified Poole-Frenkel mechanism. The high value of the activation energy is considered to indicate the possibility of charge carrier species inside the polymer bulk being ionic in nature.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pi.1995.210380106
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