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Concise Approach to T‐Shaped NBN‐Phenalene Cored Luminogens as Intensive Blue Light Emitters
Author(s) -
Wang Xiaofeng,
Sun Zuobang,
Ding Kuangyu,
Qiang Peirong,
Zhu Wenqing,
Han Sheng,
Zhang Fan
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202002649
Subject(s) - thermal stability , oled , molecule , thermal decomposition , quantum yield , luminescence , yield (engineering) , diode , fabrication , materials science , optoelectronics , stoichiometry , layer (electronics) , photochemistry , chemistry , nanotechnology , organic chemistry , optics , composite material , physics , medicine , alternative medicine , pathology , fluorescence
Small organic molecules with finely tunable physical properties are highly desired for the fabrication of low‐cost and high‐performance organic electronic devices. In this work, the syntheses of a series of T‐shaped NBN‐embedded dibenzophenalene derivatives through the formation of a key brominated intermediate in a stoichiometrically controlled reaction are presented. The geometric and electronic structures of these T‐shaped molecules can be simply tailored by attaching substituents along the direction perpendicular to the molecular main backbones, resulting in desirable physical properties, such as high thermal stability with a decomposition temperature of more than 350 °C, and intensive blue luminescence with a quantum yield up to 0.62. Organic light‐emitting diode devices fabricated with such molecules as the emitting layer release pure blue light with CIE (0.16, 0.12).