Regensburg 2013 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 86: Organic electronics and photovoltaics V (CPP, jointly with HL, O)

HL 86.8: Vortrag

Donnerstag, 14. März 2013, 17:15–17:30, H34

Characterization of Gravure Printed Polymer Light-Emitting Electrochemical Cells — •Gerardo Hernandez-Sosa, Ralph Eckstein, Serpil Tekoglu, Florian Mathies, Uli Lemmer, and Norman Mechau — Lichttechnisches Institut, Karlsruher Institut für Technologie , Karlsruhe, Deutschland

In this work we present the fabrication, characterization and ink formulation of gravure printed polymer light-emitting electrochemical cells (LECs). These light emitting devices are fabricated by sandwiching a blend of a semiconducting polymer with a solid polymer electrolyte (SPE) between two electrodes, regardless of their work function. When applying a voltage to the device, the ionic species in the active film will help to form p or n doped layers at the corresponding electrode. Following the injection of carriers, the light emission will come from the semiconductor through the formation and successive recombination of excitons in the intrinsic layer between the p and n doped regions. We correlate the LEC ink formulation to the film quality and device performance. The properties of the formulation are characterized by viscosity and contact angle measurements while the properties of the film are studied by impedance spectroscopy and atomic force microscopy.