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C1‐Linked Spirobifluorene Dimers: Pure Hydrocarbon Hosts for High‐Performance Blue Phosphorescent OLEDs
Author(s) -
Sicard Lambert J.,
Li HongCheng,
Wang Qiang,
Liu XiangYang,
Jeannin Olivier,
RaultBerthelot Joëlle,
Liao LiangSheng,
Jiang ZuoQuan,
Poriel Cyril
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201813604
Subject(s) - phosphorescence , oled , phosphor , hydrocarbon , quantum efficiency , materials science , photochemistry , optoelectronics , chemistry , nanotechnology , fluorescence , organic chemistry , physics , optics , layer (electronics)
Reported here are C1‐linked spiro‐bifluorene dimers. A comprehensive study is carried out to analyze the electronic properties of these highly twisted structures. This work shows that the C1‐position enables the design of pure hydrocarbon materials, with a high triplet energy, for hosting blue phosphors in efficient phosphorescent OLEDs (PhOLEDs). To date, this work describes the highest performance of blue PhOLEDs ever reported for pure hydrocarbons (external quantum efficiency of ca. 23 %), thus highlighting the potential of the C1‐spirobifluorene scaffold in organic electronics.