Tetranuclear Iridium Complex with a Self-Host Feature for High-Efficiency Nondoped Phosphorescent Organic Light-Emitting Diodes.
Tetranuclear Iridium Complex with a Self-Host Feature for High-Efficiency Nondoped Phosphorescent Organic Light-Emitting Diodes.
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DOI：
10.1021/acsami.8b06750
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发表时间：
2018-09
影响因子：
9.5
通讯作者：
Yang Wang;Keyan Bai;Shumeng Wang;Junqiao Ding;Lixiang Wang
中科院分区：
文献类型：
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作者：
Yang Wang;Keyan Bai;Shumeng Wang;Junqiao Ding;Lixiang Wang
新设计并合成了一种四核Ir配合物3IrB-IrG，该配合物以一个绿光发射配合物为核心，其外围被三个蓝光配合物通过非共轭连接封装。在这种多核系统的情况下，可以形成自宿主特征，表现出可忽略不计的电子通信、高效的由外向内的能量转移和独特的屏蔽效应。当在没有主体的情况下使用 3IrB-IrG 作为发光层时，相应的非掺杂器件显示出最先进的发光效率为 32.6 cd/A（34.2 lm/W，9.7%）以及 CIE 坐标（0.38，0.58）。该性能显着优于裸单核配合物 IrG（8.4 cd/A，9.2 lm/W，2.5%），凸显了自主体多核配合物首次实现高效非掺杂 PhOLED 的潜力。
A tetranuclear Ir complex 3IrB-IrG was newly designed and synthesized with one green-emitting complex as the core, whose periphery is encapsulated by three blue-emitting complexes via a nonconjugated linkage. In the case of such a multinuclear system, a self-host feature can be formed, showing negligible electron communication, efficient outside-in energy transfer, and unique shielding effect. When using 3IrB-IrG as the emitting layer in the absence of host, the corresponding nondoped device reveals a state-of-art luminous efficiency of 32.6 cd/A (34.2 lm/W, 9.7%) as well as CIE coordinates of (0.38, 0.58). The performance significantly outperforms that of the bare mononuclear complex IrG (8.4 cd/A, 9.2 lm/W, 2.5%), highlighting the potential of self-host multinuclear complexes to realize high-efficiency nondoped PhOLEDs for the first time.