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Study of flexible organic electroluminescent devices with PEDOT:PSS anodes by impedance measurements

Mariya Petrova Aleksandrova (Department of Microelectronics, Technical University of Sofia, Sofia, Bulgaria)

Microelectronics International

ISSN: 1356-5362

Article publication date: 4 January 2016

324

Abstract

Purpose

Purpose This study aims to apply the impedance spectroscopy (IS) for analyzing the electrical behavior and extracting the equivalent circuit of single-layer flexible organic light-emitting diodes (OLEDs) with poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) anode.

Design/methodology/approach

The preliminary ultraviolet (UV) treatment of the flexible substrate of polyethylene terephthalate (PET) influenced the conductivity of PEDOT:PSS anodes.

Findings

The IS showed that the OLED with UV-treated PET/PEDOT:PSS anodes had lower values of the contact resistance and higher value of the interface capacitance.

Originality/value

The obtained data were used for modeling of flexible OLEDs with polymeric anodes and calculation of important display parameters such as pixel refresh ratio, signal delays and energy losses due to contact resistances. These parameters were compared for PEDOT:PSS anodes deposited on PET treated and non-treated by UV.

Keywords

Acknowledgements

The materials were provided by grant 141ΠP0005-03, TU-Sofia.

Citation

Aleksandrova, M.P. (2016), "Study of flexible organic electroluminescent devices with PEDOT:PSS anodes by impedance measurements", Microelectronics International, Vol. 33 No. 1, pp. 47-52. https://doi.org/10.1108/MI-12-2014-0059

Publisher

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Emerald Group Publishing Limited

Copyright © 2016, Emerald Group Publishing Limited

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