We synthesized 2-styryl-9H-fluorene derivatives end-capped with the various electron-withdrawing moieties-containing arylamine groups by Buchwald–Hartwig reactions. To investigate their electroluminescent (EL) properties, multilayer devices were fabricated based on following sequence: indium-tin-oxide (ITO) (180 nm)/4,4′,4″-tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA) (60 nm)/N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) (20 nm)/2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN): blue dopants (10%) (30 nm)/bathophenanthroline (Bphen) (30 nm)/lithium quinolate (Liq) (2.0 nm)/Al (100 nm). A device using 7-(4-(((4-trifluoromethyl)phenyl)-phenylamino))styryl)-9,9-diethyl-N-(4-(trifluoromethyl)phenyl)-N-phenyl-9H-fluoren-2-amine as a dopant at 10% concentration in 2-methyl-9,10-bis(naphthalen-2-yl)anthracene host exhibited highly efficient blue emission with the luminous, power and external quantum efficiencies of 4.10 cd/A, 1.95 lm/W and 2.83% at 20 mA/cm2, respectively. The maximum value of the CIE coordinates of this device were (0.15, 0.14).
我们合成了以不同电子吸引基团含有的芳香胺为封端的2-
乙烯基-9H-
氟烯衍
生物,采用Buchwald-Hartwig反应。为了研究它们的电致发光(EL)性能,我们基于以下顺序制造了多层器件:
铟锡氧化物(ITO)(180 nm)/4,4′,4″-三[2-
萘(苯)
氨基]
三苯胺(
2-TNATA)(60 nm)/N,N′-二(1-
萘基)-N,N′
-二苯基-(1,1′-
联苯)-4,4′-二胺(NPB)(20 nm)/2-甲基-9,10-二(
萘-2-基)
蒽(MADN):蓝色掺杂剂(10%)(30 nm)/浴苯并
菲啰嗪(
Bphen)(30 nm)/
锂喹啉酸(Liq)(2.0 nm)/铝(100 nm)。使用7-(4-(((4-三
氟甲基)苯基)-
苯胺)
乙烯基)-9,9-
二乙基-N-(4-(三
氟甲基)苯基)-N-苯基-9H-
氟烯-2-胺作为掺杂剂,浓度为10%,在2-甲基-9,10-二(
萘-2-基)
蒽基质中,其表现出非常高效的蓝光发射,发光效率、功率效率和外量子效率分别为4.10 cd/A、1.95 lm/W和2.83%(在20 MA/cm²下)。该器件的CIE坐标最大值为(0.15, 0.14)。