High-frequency response of polymeric light-emitting diodes

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Pal AJ, Osterbacka R, Kallman KM, Stubb H
Publication year: 1997
Journal: Applied Physics Letters
Journal acronym: APPL PHYS LETT
Volume number: 70
Issue number: 15
Start page: 2022
End page: 2024
Number of pages: 3
ISSN: 0003-6951
eISSN: 1077-3118


The frequency dependence of alternating-current polymeric light-emitting diodes has been studied. Langmuir-Blodgett (LB) films of poly(3-hexylthiophene) have been used as the active emitting material sandwiched between LB films of emeraldine base polyaniline to form the device. We have shown that by reducing the thickness of the emitting layer using the LB deposition technique, one can increase the high-frequency operating limit of the device. From the -3 dB frequency, we have calculated the carrier mobility in the emitting polymer layer, and compared it with the Poole-Frenkel model. The electroluminescence and photoluminescence spectra have been studied. (C) 1997 American Institute of Physics.

Last updated on 2020-08-04 at 07:48