Premium
Organic Electroluminescent Bis(diarylamino) Dibenzofuran Derivatives
Author(s) -
Ku YuChan,
Yen YungSheng,
Huang TaiHsiang,
Chen ChihHsin,
Lin Jiann T.,
Tsai ChiiTang
Publication year - 2006
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200600176
Subject(s) - dibenzofuran , chemistry , oled , electroluminescence , photochemistry , benzene , layer (electronics) , tris , light emitting diode , optoelectronics , organic chemistry , materials science , biochemistry
A new series of 2,8‐disubstituted dibenzofuran derivatives ( dbf ) have been synthesized via palladium‐catalyzed coupling reactions of 2,8‐diiododibenzofuran and diarylamines. These compounds are amorphous with a glass transition temperature ranging from 65 to 193 °C. The emission colors of the materials vary from blue to bluish green. Two types of double‐layer organic light‐emitting diodes (OLEDs) were fabricated using these compounds as hole‐transporting/emitting layers and TPBI or Alq 3 as an electron‐transporting layer: (I) ITO/ dbf /TPBI/Mg:Ag and (II) ITO/ dbf /Alq 3 /Mg:Ag (TPBI = 1,3,5‐tris( N ‐phenylbenzimidazol‐2‐yl)‐benzene; Alq 3 = tris(8‐hydroxyquinoline)aluminum). In general, type I and type II devices have excitons confined in the hole‐transporting and the electron‐transporting layers, respectively. Some blue‐emitting devices of type I have promising performance.