论文部分内容阅读
We demonstrate high-brightness blue organic light emitting diodes(OLEDs) using two types of guest-host systems. A series of blue OLEDs were fabricated using three organic emitters of dibenz anthracene(perylene), di(4-fluorophenyl) amino-di(styryl) biphenyl(DSB) and 4,4’-bis[2-(9-ethyl-3-carbazolyl)vinyl]biphenyl(BCzV Bi) doped into two hosting materials of 4,4’-bis(9-carbazolyl) biphenyl(CBP) and 2-(4-biphenylyl)-5(4-tert-butyl-phenyl)-1,3,4-oxadiazole(PBD) as blue emitting layers, respectively. We achieve three kinds of devices with colors of deep-blue, pure-blue and sky-blue with the Commission Internationale de L’Eclairage(CIE) coordinates of(0.16, 0.10),(0.15, 0.15) and(0.17, 0.24), respectively, by employing PBD as host material. In addition, we present a microcavity device using the PBD guest-host system and achieve high-purity blue devices with narrowed spectrum.
A series of blue OLEDs were fabricated using three organic emitters of dibenz anthracene (perylene), di (4-fluorophenyl) amino-di ( styryl) biphenyl (DSB) and 4,4’-bis (9-ethyl-3-carbazolyl) vinyl] biphenyl (CBP) and 2- (4-biphenylyl) -5 (4-tert-butyl-phenyl) -1,3,4-oxadiazole (PBD) as blue emitting layers, respectively. -blue, pure-blue and sky-blue with the Commission Internationale de L’Eclairage (CIE) coordinates of (0.16, 0.10), (0.15, 0.15) and (0.17, 0.24) In addition, we present a microcavity device using the PBD guest-host system and achieve high-purity blue devices with narrowed spectrum.