High-efficiency electroluminescence and amplified spontaneous emission from a thermally activated delayed fluorescent near-infrared emitter

Near-infrared organic light-emitting diodes and semiconductor lasers could benefit a variety of applications including night-vision displays, sensors and information-secured displays. Organic dyes can generate electroluminescence efficiently at visible wavelengths, but organic light-emitting diodes...

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Veröffentlicht in:Nature photonics Jg. 12; H. 2; S. 98 - 104
Hauptverfasser: Dae-Hyeon, Kim, Anthony D’Aléo, Xian-Kai Chen, Atula D S Sandanayaka, Yao, Dandan, Zhao, Li, Komino, Takeshi, Zaborova, Elena, Canard, Gabriel, Tsuchiya, Youichi, Choi, Eunyoung, Jeong Weon Wu, Fages, Frédéric, Brédas, Jean-Luc, Jean-Charles Ribierre, Adachi, Chihaya
Format: Journal Article
Sprache:Englisch
Veröffentlicht: London Nature Publishing Group 01.02.2018
Schlagworte:
Active control
Adiabatic
Adiabatic flow
Boron
Coupling (molecular)
Electroluminescence
Emissions
Emissions control
Emitters
Fluorescence
I.R. radiation
Lasers
Light emitting diodes
Near infrared radiation
Organic light emitting diodes
Photonics
Polarity
Quantum efficiency
Semiconductor lasers
Spontaneous emission
Upconversion
Wavelengths
ISSN:1749-4885, 1749-4893
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Zusammenfassung:Near-infrared organic light-emitting diodes and semiconductor lasers could benefit a variety of applications including night-vision displays, sensors and information-secured displays. Organic dyes can generate electroluminescence efficiently at visible wavelengths, but organic light-emitting diodes are still underperforming in the near-infrared region. Here, we report thermally activated delayed fluorescent organic light-emitting diodes that operate at near-infrared wavelengths with a maximum external quantum efficiency of nearly 10% using a boron difluoride curcuminoid derivative. As well as an effective upconversion from triplet to singlet excited states due to the non-adiabatic coupling effect, this donor–acceptor–donor compound also exhibits efficient amplified spontaneous emission. By controlling the polarity of the active medium, the maximum emission wavelength of the electroluminescence spectrum can be tuned from 700 to 780 nm. This study represents an important advance in near-infrared organic light-emitting diodes and the design of alternative molecular architectures for photonic applications based on thermally activated delayed fluorescence.
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ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-017-0087-y