Oxadiazole-carbazole polymer (POC)-Ir(ppy) 3 tunable emitting composites
Oxadiazole-carbazole polymer (POC)-Ir(ppy) 3 tunable emitting composites
复制标题
恶二唑-咔唑聚合物(POC)-Ir(ppy) 3 可调谐发光复合材料
DOI：
10.1016/j.optmat.2016.12.039
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发表时间：
2017
影响因子：
3.9
通讯作者：
Bruno A
中科院分区：
文献类型：
--
作者：
Bruno A
POC聚合物是我们先前合成的恶二唑-咔唑共聚物，并作为有机发光器件（OLED）中的发光材料建立，尽管POC量子产率发射效率和颜色纯度仍需要提高。另一方面，三[2-苯基吡啶基-C2，N]铱（III）（Ir（ppy）3）配合物，即Ir（ppy）3是绿色发光器件中使用的最亮的发光体之一。我们的目标是利用Ir（ppy）3的发光特性，通过将Ir配合物与发蓝光的POC相结合，获得在可见光谱范围内可调谐的发光复合材料，研究了不同Ir（ppy）3浓度（1 ~ 10wt%）的POC基纳米复合材料的光学性能。光谱和时间分辨的荧光测量表明，从聚合物到掺杂剂的有效的能量转移，导致在白色发光的复合材料。当POC掺杂约5wt%浓度的Ir（ppy）3时，已发现最强和最稳定的发射。
POC polymer is an oxadiazole-carbazole copolymer we have previously synthetized and established as light emitting material in Organic Light Emitting Devices (OLEDs), although POC quantum yield emission efficiency and color purity still need to be enhanced. On the other hand, tris[2-phenylpyridinato-C2,N]iridium(III) (Ir(ppy)3) complexes, namely Ir(ppy)3are among the brightest luminophores employed in green light emitting devices. Our aim, in this work, is to take advantage of Ir(ppy)3bright emission by combining the Ir complex with blue emitting POC to obtain tunable light emitting composites over a wide range of the visible spectrum.Here we have investigated the optical proprieties POC based nanocomposites with different concentrations of Ir(ppy)3, ranging from 1 to 10 wt%. Both spectral and time resolved fluorescence measurements show an efficient energy transfer from the polymer to the dopants, resulting in white-emitting composites. The most intense and stable emission has been found when POC was doped with about 5 wt% concentration of Ir(ppy)3.