Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 22, Issue 1, Pages 210-217Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201100747
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Funding
- state of Saxony
- NKOE [FKZ12712]
- Dina Lohse
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A novel approach for alternating current (AC)-driven organic light-emitting devices is reported, which uses the concept of molecular doping in organic semiconductors. Doped organic charge-transport layers are used to generate charge carriers within the device, hence eliminating the need for injecting charge carriers from external electrodes. Bright luminance of up to 1000 cd m-2 is observed when the device is driven with an AC bias. The luminance observed is attributed to charge-carrier generation and recombination, leading to the formation of excitons within the device, without injection of charge carriers through external electrodes. A mechanism for internal charge-carrier generation and the device operation is proposed.
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