A new N-fluorenyl carbazole host material: Synthesis, physical properties and applications for highly efficient phosphorescent organic light emitting diodes
作者:Min-Gi Shin、K. Thangaraju、Seul-ong Kim、Jong-Won Park、Yun-Hi Kim、Soon-Ki Kwon
DOI:10.1016/j.orgel.2011.02.014
日期:2011.5
higher triplet energy of 2.72 eV. The phosphorescent organic light emitting diode using BDFC as host, ITO/di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane (TAPC)/host: fac-tris(2-phenylpyridine)-iridium [Ir(ppy)3] (5%)/1,3,5-tris(m-pyrid-3-yl-phenyl)benzene (TmPyPB)/LiF/Al, shows the effective confinement of triplet excitons and efficient energy transfer to the guest emitter in the emissive layer, resulted in
合成了一种新的N-芴基咔唑材料9,9'-双-(9,9-二甲基-9H-芴-2-基)-9H,9'H- [3,3']联咔唑(BDFC)通过溴化,乌尔曼和山本偶合反应并经各种光谱学研究证实。热重分析和差示扫描量热法研究显示出494.7°C的热稳定性(ΔT 5%)和177.8°C的高玻璃化转变温度(T g)。BDFC的光物理和电化学研究表明,在408 nm处有光致发光,带隙为3.01 eV,三重态能量为2.72 eV。使用BDFC作为主体的磷光有机发光二极管,ITO / di- [4-(N,N-ditolyl-氨基)-苯基]环己烷(TAPC)/主体:fac-tris(2-苯基吡啶)-铱[Ir(ppy)3 ](5%)/ 1,3,5-tris(m-pyrid-3 -苯基-苯基)苯(TmPyPB)/ LiF / Al,有效地限制了三重态激子,并有效地将能量转移到了发光层中的客体发射极,从而使器件效率更高,分别为56