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Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 57: Organic Electronics and Photovoltaics IV - Excitonic Properties and Light-Emitting Devices

CPP 57.4: Vortrag

Donnerstag, 4. April 2019, 15:45–16:00, H18

A refined setup for an enhanced signal-to-noise ratio in angular resolved photoluminescence measurements — •Christian Hänisch, Simone Lenk, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, 01187 Dresden, Germany

Controlling the orientation distribution of transition dipole moments in the emission layer of organic light-emitting diodes is one of the key approaches for further enhancements of the device efficiencies. In order to investigate this physical parameter typically angular resolved photoluminescence measurements are performed.

In this contribution, we present an advanced concept which adds two plano-convex lenses to the conventional measurement setup in order to collect and focus the initially emitted light to the detector fiber. In this manner, the signal-to-noise ratio of the recorded emission spectra can be drastically improved, which enables measurements of weakly emitting or fast degrading material systems.

A detailed ray transfer analysis is performed, which on the one hand reveals the required parameters of the optical components and on the other hand allows for a detailed evaluation and optimization of the setup alignment.

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