Self-Host Blue-Emitting Iridium Dendrimer with Carbazole Dendrons: Nondoped Phosphorescent Organic Light-Emitting Diodes
Self-Host Blue-Emitting Iridium Dendrimer with Carbazole Dendrons: Nondoped Phosphorescent Organic Light-Emitting Diodes
复制标题
具有咔唑树枝状分子的自宿主发蓝光铱树枝状聚合物：非掺杂磷光有机发光二极管
DOI：
10.1002/anie.201307311
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发表时间：
2014-01-20
影响因子：
16.6
通讯作者：
Wang, Fosong
中科院分区：
文献类型：
--
作者：
Xia, Debin;Wang, Bin;Wang, Fosong
以第二代咔唑寡聚体为树枝状分子，通过非共轭键将其共价连接到三[2-（2，4-二氟苯基）吡啶]铱（III）核上，形成一个高效的自主体体系，成功地合成了一种蓝色铱树枝状分子B-G2.与小分子磷光体和其他磷光树枝状聚合物不同，B-G2显示出随着掺杂浓度的增加器件效率的连续增强。当使用纯B-G2作为发光层时，在没有效率损失的情况下实现了非掺杂器件，从而给出了高达15.3%（31.3cdA（-1），28.91mW（-1））的最新技术水平的EQE，沿着，CIE坐标为（0.16，0.29）。
A blue-emitting iridium dendrimer, namely B-G2, has been successfully designed and synthesized with a second-generation oligocarbazole as the dendron, which is covalently attached to the emissive tris[2-(2,4-difluorophenyl)-pyridyl]iridium(III) core through a nonconjugated link to form an efficient self-host system in one dendrimer. Unlike small molecular phosphors and other phosphorescent dendrimers, B-G2 shows a continuous enhancement in the device efficiency with increasing doping concentration. When using neat B-G2 as the emitting layer, the nondoped device is achieved without loss in efficiency, thus giving a state-of-art EQE as high as 15.3% (31.3cdA(-1), 28.9lmW(-1)) along with CIE coordinates of (0.16, 0.29).