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Proceedings Paper

Rewritable luminescent tags using room-temperature phosphorescence (RTP) (Conference Presentation)
Author(s): Max Gmelch; Heidi Thomas; Felix Fries; Tim Achenbach; Sebastian Reineke

Paper Abstract

Organic room temperature phosphorescence (RTP) is used to realize rewriteable (>40 cycles), transparent and flexible optical tags with high resolution (>700 dpi). The devices contain an organic biluminescent emitter doped into polymethylmethacrylate (PMMA). They show phosphorescence, which in general is quenched by molecular oxygen. However, by illuminating with ultraviolet light (365 nm), this molecular oxygen locally vanishes at the irradiated area, 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 using light only.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11277, Organic Photonic Materials and Devices XXII, 1127707 (10 March 2020); doi: 10.1117/12.2541863
Show Author Affiliations
Max Gmelch, TU Dresden (Germany)
Heidi Thomas, TU Dresden (Germany)
Felix Fries, TU Dresden (Germany)
Tim Achenbach, TU Dresden (Germany)
Sebastian Reineke, TU Dresden (Germany)

Published in SPIE Proceedings Vol. 11277:
Organic Photonic Materials and Devices XXII
Christopher E. Tabor; François Kajzar; Toshikuni Kaino, Editor(s)

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