Impedance spectroscopy of a poly(p-phenylenevinylene)-based light-emitting diode device

Authors
Kim, SHJang, JWLee, KWLee, CEKim, SW
Issue Date
2003-10
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SOLID STATE COMMUNICATIONS, v.128, no.4, pp.143 - 146
Abstract
A poly-p-phenylenevinylene (PPV)-based light-emitting diode (LED) device was studied by means of comprehensive ac impedance measurements. Separate regions of frequency-dependent responses, the bulk and depleted (interface) regions, with distinct electrical proper-ties, were identified and characterized. The ac J-E characteristics revealed the space-charge limited conduction mechanism, which was specifically assigned to the depleted region. Besides, a direct estimate of the trap density in the bulk region was obtained from the applied voltage dependence of the charge concentration. (C) 2003 Elsevier Ltd. All rights reserved.
Keywords
P-PHENYLENE-VINYLENE; TRANSPORT; ELECTRON; CONDUCTION; TRAPS; P-PHENYLENE-VINYLENE; TRANSPORT; ELECTRON; CONDUCTION; TRAPS; polymers; elastomers; and plastics; dielectric response; electronic transport
ISSN
0038-1098
URI
https://pubs.kist.re.kr/handle/201004/138203
DOI
10.1016/S0038-1098(03)00662-8
Appears in Collections:
KIST Article > 2003
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