Deep‐Red/Near‐Infrared Electroluminescence from Single‐Component Charge‐Transfer Complex via Thermally Activated Delayed Fluorescence Channel

Formation of a single‐component charge‐transfer complex (SCCTC) is unveiled in solid state of an intermolecular charge‐transfer molecule 2‐(4‐(1‐phenyl‐1H‐phenanthro[9,10‐d]imidazol‐2‐yl)phenyl)anthracene‐9,10‐dione (PIPAQ). Intermolecular donor–acceptor interactions between two PIPAQ molecules is t...

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Bibliographic Details
Published in:Advanced functional materials 2019-09, Vol.29 (38), p.n/a
Main Authors: Chen, Wen‐Cheng, Huang, Bin, Ni, Shao‐Fei, Xiong, Yuan, Rogach, Andrey L., Wan, Yingpeng, Shen, Dong, Yuan, Yi, Chen, Jia‐Xiong, Lo, Ming‐Fai, Cao, Chen, Zhu, Ze‐Lin, Wang, Ying, Wang, Pengfei, Liao, Liang‐Sheng, Lee, Chun‐Sing
Format: Article
Language:English
Subjects:
Anthracene
Charge transfer
Crystallography
Electroluminescence
Electron paramagnetic resonance
Electron spin
Electrons
Fluorescence
intermolecular charge transfer
Materials science
near‐infrared
Optoelectronic devices
organic light‐emitting diode
single‐component charge‐transfer complex
Spin resonance
thermally activated delayed fluorescence
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Summary:Formation of a single‐component charge‐transfer complex (SCCTC) is unveiled in solid state of an intermolecular charge‐transfer molecule 2‐(4‐(1‐phenyl‐1H‐phenanthro[9,10‐d]imidazol‐2‐yl)phenyl)anthracene‐9,10‐dione (PIPAQ). Intermolecular donor–acceptor interactions between two PIPAQ molecules is the primary driving force for self‐association and contributes to intermolecular charge transfer. The SCCTC character is fully verified by crystallographic, photophysical, electron spin resonance, and vibrational characterizations. The PIPAQ‐based SCCTC is first applied in light‐emitting devices as an emissive layer to realize efficient deep‐red/near‐infrared electroluminescence. This work provides new insights into SCCTC and represents an important step toward their applications in optoelectronic devices. Dimeric single‐component charge‐transfer complexes (SCCTCs) by self‐complexation of a donor–π–acceptor molecule (PIPAQ) are revealed and fully investigated, wherein the strong intermolecular charge transfer leads to unprecedented deep‐red/near‐infrared emission. The SCCTCs can be formed in thin films and applied in electroluminescence devices to realize high efficiencies via a thermally activated delayed fluorescence channel.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201903112