Regensburg 2025 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Biomaterials, Biopolymers and Bioinspired Functional Materials II (joint session CPP/BP)

CPP 18.3: Talk

Tuesday, March 18, 2025, 10:15–10:30, H46

With digital luminescence towards minimalistic, biodegradable information storage — •Sebastian Schellhammer, Heidi Thomas, Tim Achenbach, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics, Technische Universität Dresden, Dresden, Germany

Materials showing persistent luminescence, characterized by extended excited state decay times in the millisecond range and beyond, have gained much attention. Recently, we have reported a photonic device architecture based on organic functional materials called programmable luminescent tag (PLT) that is well suited for sensing, labelling, and information exchange applications. Information can be erased and rewritten repeatedly by using the design principle of digital luminescence, i.e. the control of the local oxygen concentration in a polymer:emitter blend and accordingly the emission by room temperature phosphorescence (RTP). We present the design of PLTs made from industrially compostable, ready-to-use materials (bioPLTs). As natural emitters, quinoline alkaloids show sufficient RTP when being embedded in a polymer matrix. Polylactic acid is used as matrix material and flexible substrate. RTP can be controlled adding oxygen blocking layers made from Exceval. Although organic semiconductors provide the potential of biodegradable technologies, prototypes do only rarely exist. With this work, a promising technology for compostable information storage and sensing systems is introduced.

Keywords: Organic semiconductors; Photonics; Sensor; Phosphorescence; Solution Processing