Berlin 2015 – scientific programme

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DS: Fachverband Dünne Schichten

DS 39: Poster Session II

DS 39.23: Poster

Thursday, March 19, 2015, 16:00–18:30, Poster F

Organic light emitting diode (OLED) on Silicon for Biomedical Sensor Applications — •Matthias Jahnel¹, Michael Thomschke¹, Beatrice Beyer¹, Karsten Fehse¹, Karl Leo², and Volker Kirchhoff¹ — ¹Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, Maria-Reiche-Strasse 2, 01109 Dresden, Germany — ²Institut für Angewandte Photophysik, Technische Universität Dresden (TUD), 01062 Dresden, Germany

Organic thin film devices like light emitting diodes (OLED) or organic photo diodes (OPD) integrated on silicon backplanes could be one promising way to achieve low cost sensors. We present two types of top emitting OLED devices that are suitable for lab-on-a-chip applications. Both include optically filtered green light emission, 1st case by a single titanium dioxide (TiO2) layer in 2nd case using a distributed-Bragg-reflector (DBR) based on TiO2 and silicon oxide (SiO2). These OLED devices are covered with a thin film encapsulation. We investigated the influence of the substrate surface temperature during the deposition on the performance of the devices and compared them to reference devices without TiO2 layers. Further, we achieved a narrow emission spectrum with a Full Width at Half Maximum (FWHM) of 20 nm and additionally a minimized angular dependency of the electroluminescence peak. Both device architectures can be used for large area deposition as well as integration onto Silicon-CMOS backplanes and resultingly, a combination of optical functional dielectric layers with organic electronic devices in bio and medical sensor applications.