Abstract
ABSTRACT In this manuscript, we report on the performance of organic light-emitting diodes with remote metallic contact using N,N-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-C 13 H 27 ) as well as perfluorohexyl-sustituted quaterthiophenes (DHF-4T) as the electron-transport material. Both materials exhibit high electron field-effect mobility. An electron mobility of 0.123 cm²/Vs is demonstrated for DHF-4T. The wide optical bandgap of DHF-4T allows reduction of the light absorption in the region of interest compared to PTCDI-C 13 H 27 . In this way an external quantum efficiency of 0.25% could be obtained. This is a factor of 10 larger than in PTCDI-C 13 H 27 based devices. Keywords: organic light-emitting diode, field-effect, electron-transport organic semiconductor, organic heterojunction, electron mobility, extern al quantum efficiency. 1. INTRODUCTION Since the first report of electroluminescence in organic thin films, [1] organic light-emitting devices have gained significant attention. In the last decade remarkable progress has been observed in the development of organic light-emitting diodes (OLEDs) using polymers as well as small molecule semiconductors.
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