In order to obtain an AC electrical model of polyfluorene-PEDOT poly(3,4-ethylenedioxythiophene) based organic light emitting diodes, different devices have been realized using three PEDOT dispersions. Static current-voltage characteristics have revealed exponential like transport in all the samples and the bias has shown no dependence on admittance spectra. An electrical model is proposed and the estimated capacitance has been analyzed in terms of polyfluorene bulk intra-gap state distribution obtaining a state density of about 10(16) eV(-1) cm(-3). The hypothesis of a space charge involving completely the polyfluorene layer has been discussed. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3634121]
Admittance electrical model of polyfluorene based organiclight emitting diodes
PETROSINO, MARIO;RUBINO, Alfredo
2011-01-01
Abstract
In order to obtain an AC electrical model of polyfluorene-PEDOT poly(3,4-ethylenedioxythiophene) based organic light emitting diodes, different devices have been realized using three PEDOT dispersions. Static current-voltage characteristics have revealed exponential like transport in all the samples and the bias has shown no dependence on admittance spectra. An electrical model is proposed and the estimated capacitance has been analyzed in terms of polyfluorene bulk intra-gap state distribution obtaining a state density of about 10(16) eV(-1) cm(-3). The hypothesis of a space charge involving completely the polyfluorene layer has been discussed. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3634121]I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
