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Triphenylamine‐Substituted Polyfluorene—A Stable Blue‐Emitter with Improved Charge Injection for Light‐Emitting Diodes
Author(s) -
Ego C.,
Grimsdale A.C.,
Uckert F.,
Yu G.,
Srdanov G.,
Müllen K.
Publication year - 2002
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(20020605)14:11<809::aid-adma809>3.0.co;2-8
Subject(s) - triphenylamine , polyfluorene , materials science , oled , optoelectronics , light emitting diode , excimer , electroluminescence , diode , common emitter , fluorene , blue light , polymer , layer (electronics) , optics , fluorescence , nanotechnology , composite material , physics
Efficient, stable blue light‐emitting diodes (LEDs) might be achieved by using (poly[9,9‐bis(triphenylamine)fluorene]) (see Figure) as a hole‐transporting emissive layer. This polymer not only exhibits an initial pure blue emission with no aggregate/excimer emission, but also a much improved hole injection over standard poly(9,9‐dialkylfluorene)s. The simple two‐step synthesis from commercially available materials is also described.