Alternating current light-emitting diodes and their transient characteristics: Response time and carrier transport

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Pal AJ, Ostergard T, Osterbacka R, Kallman KM, Stubb H
Publication year: 1997
Journal: MRS Online Proceedings Library
Journal acronym: MATER RES SOC SYMP P
Volume number: 488
Start page: 93
End page: 98
Number of pages: 4
ISSN: 0272-9172
eISSN: 1946-4274


We report the fabrication and characterization of alternating current light-emitting diodes (LEDs) with quinquethiophene as the emitting material. We have obtained equal electroluminescence intensity in both bias sections. From the frequency response of the LEDs, we have estimated the device response times and compared them with the response times obtained from the transient response of de LEDs. Langmuir-Blodgett film deposition technique has been employed to control the thickness of the emitting layer on the molecular scale. We have shown that the response times originate from the accumulation rather than the transit of charge carriers. We have compared the photo- and electroluminescence spectra of QT LEDs.

Last updated on 2020-02-07 at 05:17