Up-conversion injection in Rubrene/Perylene-diimide-heterostructure electroluminescent diodes

Details Up-conversion injection in Rubrene/Perylene-diimide-heterostructure electroluminescent diodes Up-conversion injection in Rubrene/Perylene-diimide-heterostructure electroluminescent diodes

2007-06-06

arxiv.org/abs/0706.0840v1

Applied Physics Letters 90(26), 263508 (2007)

Physics

Condensed Matter

Materials Science

we report the first evidence of an Auger-fountain electroluminescence in a semiconductor heterojunction

Scientific paper

10.1063/1.2752540

We implement and demonstrate a scheme that permits to drive electroluminescence with an extremely low turn-on voltage. The device behaves like compound semiconductors, in which the electroluminescence turn-on voltage is about the same as the open circuit voltage for the photovoltaic effect. However, the electroluminescence turn-on voltage is about half of the band gap of the emitting material, that cannot be explained using current models of charge injection in organic semiconductors. We hereby propose explanation through an Auger-type two-step injection mechanism (Auger-fountain).

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