Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 3: Molecular Electronics and Excited State Properties

CPP 3.8: Vortrag

Montag, 1. April 2019, 11:45–12:00, H13

Programmable transparent organic luminescent tags — •Max Gmelch, Heidi Thomas, Felix Fries, and Sebastian Reineke — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, 01187 Dresden, Germany

A novel approach for organic luminescent labeling is shown, providing unmatched image resolution (>700 dpi) combined with fast and multiple (>40 cycles) printing onto and erasing from various substrates in any shape or size. These ultrathin, fully transparent and flexible organic tags contain highly available materials only and are easy to process. The material system consists of an organic biluminescent emitter, embedded into a PMMA host matrix and covered by an oxygen barrier layer. It shows room temperature phosphorescence (RTP), which in general is quenched by molecular oxygen. However, by illuminating with ultraviolet light, this molecular oxygen locally vanishes at the irradiated spots, enabling RTP at defined spots. Further, by illuminating with infrared light, the system can be refilled with oxygen leading to quenching of the RTP again. Therefore, any luminescent pattern can be written into and erased from the tag without contact or the use of any ink. Using light only, this new technology offers the possibility of invisible on-demand information readout.