ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Impedance Spectroscopy of ${\pi}$-Conjugated Organic Materials

  • Received : 2002.12.31
  • Published : 2004.04.30
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Abstract

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-phenylenevinylene] (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.

Keywords

References

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