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Orthogonal Molecular Structure for Better Host Material in Blue Phosphorescence and Larger OLED White Lighting Panel
Author(s) -
Ding Lei,
Dong ShouCheng,
Jiang ZuoQuan,
Chen Hua,
Liao LiangSheng
Publication year - 2015
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201403402
Subject(s) - phosphorescence , materials science , phosphor , oled , triphenylamine , fluorene , quantum efficiency , optoelectronics , acridine , optics , nanotechnology , polymer , chemistry , physics , organic chemistry , fluorescence , layer (electronics) , composite material
High‐efficiency blue phosphorescence devices with external quantum efficiencies above 25% are developed using a new bipolar host material, diphenyl(10‐phenyl‐10 H ‐spiro[acridine‐9,9′‐fluoren]‐2′‐yl)phosphine oxide (POSTF), which is constructed in orthogonal molecular structure with a spiro‐coree. The separation of bipolarity from effective spiro‐fluorene‐triphenylamine (STF) structure is elucidated and its versatility in device is evaluated by two kinds of sky‐blue phosphors. Noticeably, large‐size white light‐emitting panel (150 mm × 150 mm) is fabricated with max power efficiency of 75.9 l m W −1 using this new host.