1，3，4-噁二唑/螺-9，9′-氧杂蒽芴主体材料及其红、绿色磷光器件
1，3，4-Oxadiazole/Spiro-9，9′-xanthene fluorene host materials and their red and green phosphorescent devices
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摘要: 以1，3，4-噁二唑/螺-9，9′-氧杂蒽芴螺环化合物2，5-双（2（2-螺-9，9′-氧杂蒽芴苯基）-1，3，4-噁二唑（D［2-SFXP］-o-OXD）为主体材料，以［Ir（pq）2acac］和［Ir（mppy）3］分别为红、绿色磷光客体材料，通过溶液加工法，将红色磷光客体材料［Ir（pq）2acac］和绿色磷光客体材料［Ir（mppy）3］分别以6%和4%的质量浓度掺入母体中作为发光层，成功地制备了基于主体材料D［2-SFXP］-o-OXD的红、绿色磷光器件。研究结果表明，主体材料能够有效地将能量分别转移给红色和绿色磷光客体材料，其最大电流效率分别可达5.7 cd/A和 15.8 cd/A。然而，由于主客体间能级匹配欠佳，导致器件效率随着驱动电压上升而迅速降低。因此，通过主体材料和器件结构优化有望进一步改善器件性能，进而制备稳定高效的有机电致发光器件。Abstract: 1，3，4-oxadiazole/spiro-9，9′-xanthene-fluorene spirocyclic compound 2，5-bis（2（2-spiro‑9，9′‑xanthene-fluorene phenyl）-1，3，4-oxadiazole （D［2-SFXP］-o-OXD） was used as the host material， ［Ir（pq）2acac］ and ［Ir（mppy）3］ were used as the red and green phosphorescent guest material that were doped into the host material with doping concentration of 6% and 4% as the emitting layers to fabricate the red and green phosphorescent devices by solution-processing method， respectively. The device results showed that the host material could effectively transfer the energy to the red and green phosphorescent guest materials， respectively， and the maximum current efficiencies of the devices were up to 5.7 cd/A and 15.8 cd/A， respectively. However， the device efficiencies decreased rapidly as the increasing of the driving voltage due to the poor energy level matching between the host and guest. Therefore， the improvement of the device performance could be achieved for further step through optimizing of the host material and device structure. Then， the stable and high efficient organic electroluminescent devices could be prepared.
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