Large-scale patterning of indium tin oxide electrodes for guided mode extraction from organic light-emitting diodes
2008; American Institute of Physics; Volume: 104; Issue: 9 Linguagem: Inglês
10.1063/1.3014034
ISSN1520-8850
AutoresUlf Geyer, Julian Hauss, Boris Riedel, Sebastian Gleiss, Uli Lemmer, Martina Gerken,
Tópico(s)Semiconductor Lasers and Optical Devices
ResumoWe describe a cost-efficient and large area scalable production process of organic light-emitting diodes (OLEDs) with photonic crystals (PCs) as extraction elements for guided modes. Using laser interference lithography and physical plasma etching, we texture the indium tin oxide (ITO) electrode layer of an OLED with one- and two-dimensional PC gratings. By optical transmission measurements, the resonant mode of the grating is shown to have a drift of only 0.4% over the 5mm length of the ITO grating. By changing the lattice constant between 300 and 600nm, the OLED emission angle of enhanced light outcoupling is tailored from −24.25° to 37°. At these angles, the TE emission is enhanced up to a factor of 2.14.
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