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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 29: Emerging Topics in Chemical and Polymer Physics, New Instruments and Methods III

CPP 29.3: Vortrag

Dienstag, 10. März 2026, 14:30–14:45, ZEU/0255

Utilizing Immediate Phosphorescence in Organic Photonic Devices for Rewritable Information Storage and Oxygen Sensing — •Lucy Winkler, Sebastian Schellhammer, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute of Applied Physics (IAP), Technische Universität Dresden

Programmable luminescent tags (PLTs) are photonic devices that offer simple and versatile solutions for reversible information storage and food labeling by using the oxygen-sensitive phosphorescent emission from organic emitters embedded in polymer matrices [1]. Conventional PLTs fabricated by spin-coating under ambient conditions exhibit oxygen-quenched phosphorescence in their initial state, requiring photoactivation to consume oxygen in the active layer and switch on emission. However, these PLTs show inconsistent activation between the initial and subsequent writing processes, significantly limiting their controlled reusability for practical applications [2]. To better understand activation cycles and identify potential improvements, different fabrication workflows in oxygen-free environments were tested. While activation behavior remains similar to conventional devices, these fabrication approaches enable creation of activated PLTs with an initial switched-on state that could serve as simple oxygen detectors, for example, in vacuum packaging integrity monitoring.
[1] Thomas, H. et al. Adv. Mater. 36, 2310674 (2024).
[2] Tsiko, U., et al. Commun Chem 8, 274 (2025).

Keywords: Programmable Luminescent Tag (PLT); Room-Temperature Phosphorescence (RTP); Organic emitter; Oxygen-free fabrication; Spin-coating