Nonvolatile liquid anthracenes for facile full-colour luminescence tuning at single blue-light excitation

Sukumaran Santhosh Babu, Martin J. Hollamby, Junko Aimi, Hiroaki Ozawa, Akinori Saeki, Shu Seki, Kenji Kobayashi, Keita Hagiwara, Michito Yoshizawa, Helmuth Möhwald and Takashi Nakanishi ()
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Sukumaran Santhosh Babu: National Institute for Materials Science (NIMS)
Martin J. Hollamby: National Institute for Materials Science (NIMS)
Junko Aimi: National Institute for Materials Science (NIMS)
Hiroaki Ozawa: National Institute for Materials Science (NIMS)
Akinori Saeki: Graduate School of Engineering, Osaka University
Shu Seki: Graduate School of Engineering, Osaka University
Kenji Kobayashi: Faculty of Science, Shizuoka University
Keita Hagiwara: Chemical Resources Laboratory, Tokyo Institute of Technology
Michito Yoshizawa: Chemical Resources Laboratory, Tokyo Institute of Technology
Helmuth Möhwald: Max Planck Institute of Colloids and Interfaces, Research Campus Golm
Takashi Nakanishi: National Institute for Materials Science (NIMS)

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Nonvolatile room-temperature luminescent molecular liquids are a new generation of organic soft materials. They possess high stability, versatile optical properties, solvent-free fluid behaviour and can effectively accommodate dopant dye molecules. Here we introduce an approach to optimize anthracene-based liquid materials, focussing on enhanced stability, fluorescence quantum yield, colour tunability and processability, with a view to flexible electronic applications. Enveloping the anthracene core in low-viscosity branched aliphatic chains results in stable, nonvolatile, emissive liquid materials. Up to 96% efficient energy-transfer-assisted tunable emission is achieved by doping a minute amount of acceptor dye in the solvent-free state. Furthermore, we use a thermoresponsive dopant to impart thermally controllable luminescence colours. The introduced strategy leading to diverse luminescence colours at a single blue-light excitation can be an innovative replacement for currently used luminescent materials, providing useful continuous emissive layers in developing foldable devices.

Date: 2013
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DOI: 10.1038/ncomms2969

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