Determination of Drift Mobility and Localized-state Distribution in Organic Light-emitting Diodes by Impedance Spectroscopy

Abstract

Impedance spectroscopy is a powerful tool for the characterization of organic devices such as organic light-emitting diodes and organic solar cells. Theoretical background for the determination of charge carrier mobilities and localized-state distributions from the impedance spectra of the organic devices is described. The applicability of impedance spectroscopy is demonstrated in polyfluorene-based organic light-emitting diodes.