Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 36: Organic Semiconductors (joined session with CPP, DS)

HL 36.10: Talk

Tuesday, March 21, 2017, 12:15–12:30, POT 251

Improving lasing properties of a hybrid OLED/microcavity structure — •Stefan Meister, Robert Brückner, Markas Sudzius, Hartmut Fröb, and Karl Leo — IAPP, TU Dresden, Germany

Organic materials have many advantages which can be utilized in different kinds of devices such as light-emitting diodes, solar cells, or even lasers. Some examples are the spectrally separated broad absorption and emission spectra, the possibility to build very thin and flexible devices, and the fact of having an intrinsic four-energy-level-system.

The goal of realizing an electrically driven organic solid state laser is so far well beyond reach. As a first step, we incorporate an OLED into a microcavity (MC) consisting of two Distributed Bragg Reflectors (DBR). These devices are investigated electrically and with a micro-photoluminescence setup to determine the optical functionality. The optical measurements further allow to compare it to standard organic MCs. These insights are analyzed and addressed with the help of photolitography to improve the quality of the metal layers. Further, different very thin (60nm - 0.15mm) encapsulation methods are tested to allow measurements under ambient conditions.