2020/01/30 by Max Gmelch, Tim Achenbach, Gmelch, Max +6 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Applied Physics (physics.app-ph) #Catalytic Cross-Coupling Reactions #FOS: Physical sciences #Lanthanide and Transition Metal Complexes #Luminescence and Fluorescent Materials #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci #physics.app-ph
paper · pdf · doi:10.48550/arxiv.2001.11215
openalex publication_date 2020/01/30 · arxiv created 2021/04/20 · arxiv updated 2021/04/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Most materials recently developed for room temperature phosphorescence (RTP) lack of practical relevance due to their inconvenient crystalline morphology. Using amorphous material systems instead, programmable luminescent tags (PLTs) based on organic biluminescent emitter molecules with easy processing and smooth sample shapes were presented recently. Here, the effective quenching of the emitters RTP by molecular oxygen (O2) and the consumption of the excited singlet O2 through a chemical reaction represent the central features. With customized activation schemes, high resolution content can be written and later erased multiple times into such films, providing a versatile yet simple photonic platform for information storage. However, two important limitations remain: (i) The immutable fluorescence of the emitters outshines the phosphorescent patterns by roughly one order of magnitude, allowing read-out of the PLTs only after the excitation source is turned off. (ii) The programming of these systems is a rather slow process, where lowest reported activation times are still > 8 s. Here, a material-focused approach to PLTs with fast activation times of 120 +/- 20 ms and high-contrast under continuous-wave (cw) illumination is demonstrated, leading to accelerated programming on industry relevant time scales and a simplified readout process both by eye and low cost cameras.