Near‐Infrared Electroluminescence beyond 800 nm with High Efficiency and Radiance from Anthracene Cored Emitters

• DOI: 10.1002/anie.202006197
• Publication Date: 2020-08-07T23:03:07Z
• Authors: You‐Jun Yu; Yun Hu; Sheng‐Yi Yang; Wei Luo; Yi Yuan; Chen‐Chen Peng; Jin‐Feng Liu; Aziz Khan; Zuo‐Quan Jiang; Liang‐Sheng Liao
• Keywords: Solvatochromism; Pyrazine; Acceptor

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 designed synthesized. Both molecules have large dipole moments owing the strong intramolecular charge transfer interactions between donors acceptor. Thus, compared doped films, emission of neat films can fully fall into NIR region (>700 nm) increasing surrounding polarity by doping ratio. Moreover, non-doped devices provide peaks at 838 916 nm, respectively. A maximum radiance 20707 mW Sr-1 m-2 was realized for further optimized device DCPA-TPA. This work provides a simple efficient strategy molecular design developing emitting materials.