Synthesis and photo- and electroluminescent properties of copolyfluorenes with nile red fragments in side chains

被引：0
|
作者：
G. I. Nosova
D. A. Lypenko
R. Yu. Smyslov
I. A. Berezin
E. V. Zhukova
E. I. Mal’tsev
A. V. Dmitriev
L. S. Litvinova
N. A. Solovskaya
O. V. Dobrokhotov
I. G. Abramov
A. V. Yakimanskii
机构：
[1] Russian Academy of Sciences,Institute of Macromolecular Compounds
[2] Russian Academy of Sciences,Frumkin Institute of Physical Chemistry and Electrochemistry
[3] Yaroslavl State Technical University,undefined
来源：
Polymer Science Series B | 2014年 / 56卷
关键词：
Polymer Science Series; Carbazole; Emissive Layer; Dibromo; Triphenylamine;
D O I：
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学科分类号：
摘要：
New copolyfluorenes containing units of 4,7-dibromo-2,1,3-benzothiadiazole (green luminophore) and 3,6- or 2,7-dibromocarbazole derivatives with side-chain fragments of green (4-pyrrolidinyl-1,8-naphthalimide) and red (Nile red) luminophores and additional carbazole or diphenyloxadiazole groups are synthesized via the Suzuki copolycondensation reaction. The structure of the polymers is modified via insertion of triphenylamine, aryloxadiazole, and quinoxaline units in the backbone of copolyfluorenes and via introduction of triphenylamine, fluorene, and benzene terminal groups. The molecular-weight characteristics of the polycondensation products and the specific features of the transfer of polyfluorene emission energy to the indicated luminophores in solutions and films are studied. Coating the emissive copolyfluorene layer with electron-conducting and hole-blocking layers of poly[9,9-bis(6′-diethoxyphosphorylhexyl)fluorene] makes it possible to increase the brightness of light-emitting diodes (to 2380–3900 cd/m2) and their current and luminance efficiencies.
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页码：59 / 76
页数：17
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