Bright red-emitting electrophosphorescent device using osmium complex as a triplet emitter
Bright red-emitting electrophosphorescent device using osmium complex as a triplet emitter
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DOI：
10.1063/1.1593230
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发表时间：
2003-07
影响因子：
4
通讯作者：
J. H. Kim;Michelle Liu;A. Jen;Brenden Carlson;L. Dalton;C. Shu;R. Dodda
中科院分区：
文献类型：
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作者：
J. H. Kim;Michelle Liu;A. Jen;Brenden Carlson;L. Dalton;C. Shu;R. Dodda
利用锇配合物作为三重态发光掺杂剂，在聚芴衍生物和聚芴衍生物中制备了一系列高效、明亮的双层发光器件，含有空穴传输性三苯胺（TPA）和电子传输性恶二唑（OXD）作为侧链的（PF-TPA-OXD）和2-聚（N-乙烯基咔唑）（PVK）中的（4-叔丁基苯基）-5（4-联苯基）-1，3，4-恶二唑（PBD）。由于PF-TPA-OXD中平衡的电荷注入和传输以及从该聚合物到Os络合物的非常有效的能量转移，所得器件（氧化铟锡/HTL/OsCF 3：PF-TPA-OXD/Ca/Ag）达到2.1%的最大外量子效率，峰值亮度为2920 cd/m2。这些结果显著高于从常用宿主PVK：PBD获得的结果（0.49%和1270 cd/m2）。
A series of efficient and bright double-layer light-emitting devices have been fabricated using the osmium (Os) complex as the triplet emissive dopant in both a blue-emitting polyfluorene derivative (PF–TPA–OXD) containing hole-transporting triphenylamine (TPA) and electron-transporting oxadiazole (OXD) as side chains and a blend of 2-(4-t-butylphenyl)-5(4-biphenylyl)-1,3,4-oxadizole (PBD) in poly(N-vinylcarbazole) (PVK). Due to a balanced charge injection and transport in PF–TPA–OXD and very efficient energy transfer from this polymer to the Os complex, the resulting device (indium tin oxide/HTL/OsCF3:PF–TPA–OXD/Ca/Ag) reaches a maximum external quantum efficiency of 2.1% with a peak brightness of 2920 cd/m2. These results are significantly higher than those obtained from the commonly used host, PVK:PBD (0.49% and 1270 cd/m2).