Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence

Nikita A. Drigo; Liudmila G. Kudriashova; Sebastian Weissenseel; Andreas Sperlich; Aron Joel Huckaba; Mohammad Khaja Nazeeruddin; Vladimir Dyakonov

doi:10.1021/acs.jpcc.8b08716

Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence

Nikita A. Drigo, Liudmila G. Kudriashova, Sebastian Weissenseel, Andreas Sperlich, Aron Joel Huckaba, Mohammad Khaja Nazeeruddin, Vladimir Dyakonov

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally activated delayed fluorescence (TADF). The last is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs and demonstrated 6.8% in a working device.

Original language	English
Pages (from-to)	22796-22801
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	122
Issue number	39
DOIs	https://doi.org/10.1021/acs.jpcc.8b08716
State	Published - Oct 4 2018

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence",

abstract = "We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally activated delayed fluorescence (TADF). The last is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs and demonstrated 6.8% in a working device.",

author = "Drigo, {Nikita A.} and Kudriashova, {Liudmila G.} and Sebastian Weissenseel and Andreas Sperlich and Huckaba, {Aron Joel} and Nazeeruddin, {Mohammad Khaja} and Vladimir Dyakonov",

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doi = "10.1021/acs.jpcc.8b08716",

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T1 - Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence

AU - Drigo, Nikita A.

AU - Kudriashova, Liudmila G.

AU - Weissenseel, Sebastian

AU - Sperlich, Andreas

AU - Huckaba, Aron Joel

AU - Nazeeruddin, Mohammad Khaja

AU - Dyakonov, Vladimir

PY - 2018/10/4

Y1 - 2018/10/4

N2 - We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally activated delayed fluorescence (TADF). The last is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs and demonstrated 6.8% in a working device.

AB - We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A). The dual A-DxD-A structure is shown to provide pure-blue emission in relation to its single A-D counterpart. Time-resolved photoluminescence (TRPL) recorded in the broad dynamic range from solutions and solid films revealed three emission components: prompt fluorescence, phosphorescence, and efficient thermally activated delayed fluorescence (TADF). The last is independently proven by temperature-dependent TRPL and oxygen-quenching PL experiment. From the PL lifetimes and quantum yield, we estimated maximum external quantum efficiency of 7.1% in SBABz4-based OLEDs and demonstrated 6.8% in a working device.

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ER -

Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence

Abstract

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