SKM 2023 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.15: Poster

Montag, 27. März 2023, 18:00–20:00, P3

Optimizing narrowband OPDs for wavelength range from 700 nm to 1100 nm — •Fred Kretschmer, Louis Conrad Winkler, Jakob Wolansky, Johannes Benduhn, and Karl Leo — Technische Universität Dresden, Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute of Applied Physics (IAP), Dresden, Germany

In recent years, organic photodetectors have attracted particular interest, due to their advantageous properties, such as cheap manufacturing costs and high performance, compared to inorganic devices. Particularly important is the narrowband photo-response, which enables the detection of small wavelength ranges, making optical filters obsolete and allowing miniature detector compositions. Narrowband spectroscopic sensors are an integral part of modern society, for example, in food quality monitoring, signal communication, or medical imaging.

In this contribution, microcavity-enhanced organic photodetectors in the visible and near-infrared wavelength range are investigated. For these devices, the active and transport layer thickness are varied and analysed for the donor material Rubrene and Spiro-MeO-TPD. Therefore, performance parameters such as the external quantum efficiency, the specific detectivity, the dark current, the response speed, and parasitic side effects are investigated and examined, leading to concrete device guidelines which can increase the performance of narrowband organic photodetectors. In a next step, we are planning to complement these detectors with infrared light-emitting diodes for a fully organic, spectroscopic sensing system.