Study of flexible organic electroluminescent devices with PEDOT:PSS anodes by impedance measurements
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
:Emerald Group Publishing Limited
Copyright © 2016, Emerald Group Publishing Limited