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Near‐Infrared Electroluminescence beyond 800 nm with High Efficiency and Radiance from Anthracene Cored Emitters
Author(s) -
Yu YouJun,
Hu Yun,
Yang ShengYi,
Luo Wei,
Yuan Yi,
Peng ChenChen,
Liu JinFeng,
Khan Aziz,
Jiang ZuoQuan,
Liao LiangSheng
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202006197
Subject(s) - electroluminescence , materials science , anthracene , intramolecular force , solvatochromism , doping , optoelectronics , pyrazine , acceptor , photochemistry , near infrared spectroscopy , amine gas treating , dipole , oled , infrared , molecule , chemistry , nanotechnology , optics , organic chemistry , physics , layer (electronics) , condensed matter physics
Derivatives based on anthryleno[1,2‐b]pyrazine‐2,3‐dicarbonitrile (DCPA) are used as luminescent materials, to realize near‐infrared (NIR) electroluminescence. By functionalizing DCPA with aromatic amine donors, two emitters named DCPA‐TPA and DCPA‐BBPA are designed and synthesized. Both molecules have large dipole moments owing to the strong intramolecular charge transfer interactions between the amine donors and the DCPA acceptor. Thus, compared with doped films, the emission of neat films of DCPA‐TPA and DCPA‐BBPA can fully fall into the NIR region (>700 nm) with increasing surrounding polarity by increasing doping ratio. Moreover, the non‐doped devices based on DCPA‐TPA and DCPA‐BBPA provide NIR emission with peaks at 838 and 916 nm, respectively. A maximum radiance of 20707 mW Sr −1 m −2 was realized for the further optimized device based on DCPA‐TPA. This work provides a simple and efficient strategy of molecular design for developing NIR emitting materials.