Berlin 2024 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Organic Electronics and Photovoltaics I

CPP 18.10: Talk

Tuesday, March 19, 2024, 12:15–12:30, H 0110

Tuning programmable luminescent tags by phosphorescent emitter design — •Uliana Tsiko, Heidi Thomas, Sebastian Schellhammer, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden

Purely organic materials with pronounced room temperature phosphorescence (RTP) offer extended emission lifetimes as well as solution processability, mechanical flexibility, and low ecological footprint. These characteristics have led to the development of programmable luminescent tags (PLTs), which allow minimalistic and powerful reusable information storage and labeling [1,2]. To extend the applicability of this technology, emitters with improved RTP efficiency covering a wide spectral range are required.

In our contribution, we present the synthesis as well as the spectroscopic and theoretical analysis of a set of donor-acceptor-donor (D-A-D) materials. Thianthrene as donor unit is combined with nitrogen-containing heterocycles with systematically increasing accepting character. The materials cover a wide range of properties from pronounced fluorescence without RTP to relatively efficient RTP emission but almost no fluorescence. Based on the latter compound, improved PLTs are designed and characterized. Our results provide further insights on structure-property-relationships of RTP emitters strengthening their rational design.

[1] Gmelch et al. Sci. Adv. (2019).

[2] Gmelch et al. Adv. Sci. (2021).

Keywords: luminescence; information storage; organic materials; photonics; synthesis