Open AccessImpedance Spectroscopy of π‐Conjugated Organic Materials
Author(s) -
Kim Seong Hyun,
Chu Hye Yong,
Zyung Taehyoung,
Yang Yong Suk
Publication year - 2004
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.04.0102.0018
Subject(s) - dielectric spectroscopy , materials science , oled , phenylene , conjugated system , electrical impedance , diode , optoelectronics , thermal conduction , light emitting diode , spectroscopy , electrochemistry , polymer , electrical engineering , nanotechnology , chemistry , physics , electrode , composite material , layer (electronics) , quantum mechanics , engineering
AC electrical properties of organic light‐emitting diodes with poly(2‐methoxy‐5‐(2'‐ethyl‐hexyloxy)‐1,4‐phenylenevinylene) (MEH‐PPV), poly[2,5‐bia(dimethyloctylsilyl)‐1,4‐phenylene‐vinylene] (BDMOS‐PPV), and tris‐(8‐hydroxyquinolate)‐aluminum (AlQ 3 ) as light‐emitting materials are studied. The frequency‐dependent real and imaginary parts of impedance were fitted using an equivalent circuit. We found that the conduction mechanism is a space‐charge limited current with exponential trap distribution.