Deep-blue emitting poly(2 ',3 ',6 ',7 '-tetraoctyl-2,7-spirosilabifluorene) simultaneously with good color purity and high external quantum efficiency
Deep-blue emitting poly(2 ',3 ',6 ',7 '-tetraoctyl-2,7-spirosilabifluorene) simultaneously with good color purity and high external quantum efficiency
复制标题
深蓝色发光聚(2-,3-,6-,7-四辛基-2,7-螺硅芴)同时具有良好的色纯度和高外量子效率
DOI：
10.1016/j.orgel.2018.04.046
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发表时间：
2018
影响因子：
3.2
通讯作者：
Wang Lixiang
中科院分区：
文献类型：
--
作者：
Xu Xiushang;Bai Keyan;Ding Junqiao;Wang Lixiang
一种用于PLEDs的深蓝光poly(2′，3′，6′，7′-tetraoctyl-2，7-spirosilabifluorene)，，即PSSiBF，是最新研制出来的。与以前报道的烷基功能化的P27SiF不同，PSSiBF中的两个螺环连接的二苯硅醚基团之间的垂直排列可以有效地防止不必要的聚集。与P2 7SiF(ΦPL= 0.6 2)相比，PSSiBF薄膜在4 5 0~5 5 0 nm范围内的长波发射显著降低，光量子效率提高了0.84。基于双层器件结构，PSSiBF发出明亮的深蓝色电致发光，显示出最新的EQE为2.8%，CIE坐标为(0.16，0.06)。同时实现良好的颜色纯度和高的EQE清楚地表明，含硅聚合物在高效PLED方面确实具有巨大的潜力。
A deep-blue emitting poly(2′,3′,6′,7′-tetraoctyl-2,7-spirosilabifluorene), namely PSSiBF, has been newly developed for PLEDs. Unlike the previously-reported alkyl-functionalized P27SiF, the unwanted aggregation can be effectively prevented in PSSiBF due to the perpendicular arrangement between two spiro-linked dibenzosilole moieties. Compared with P27SiF (ΦPL= 0.62), consequently, an improved PLQY of 0.84 is obtained for the film of PSSiBF accompanied by a significant reduction of the long-wavelength emission in the range of 450–550 nm. Based on a double-layer device configuration, PSSiBF gives a bright deep-blue electroluminescence, revealing a state-of-art EQE of 2.8% and CIE coordinates of (0.16, 0.06). The simultaneous realization of good color purity and high EQE clearly implies that the silicon-containing polymers do have the great potential in efficient PLEDs.