Efficient Blue, Green, and Red Electroluminescence from Carbazole-Functionalized Poly(spirobifluorene)s
Efficient Blue, Green, and Red Electroluminescence from Carbazole-Functionalized Poly(spirobifluorene)s
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咔唑官能化聚螺二芴的高效蓝色、绿色和红色电致发光
DOI：
10.1021/acs.macromol.7b01393
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发表时间：
2017-09-12
期刊：
影响因子：
5.5
通讯作者：
Wang, Lixiang
中科院分区：
文献类型：
--
作者：
Bai, Keyan;Wang, Shumeng;Wang, Lixiang
基于具有高荧光量子产率和深蓝色发射的咔唑功能化聚螺二芴，通过独立引入二苯并噻吩-S,S-二氧化物（3,7SO）、4,7-二苯基苯并噻二唑（DPBT）和4,7-二噻吩基苯并噻二唑（DTBT）作为共聚单元，成功开发了一系列蓝色、绿色和红色发光聚合物，以在整个可见光区域内调节发射颜色。详细研究了它们的负载量对电化学、光物理和电致发光性能的影响。结果发现，PCzSF-3,7SO15、PCzSF-DPBT15 和 PCzSF-DTBT03 显示出最佳的蓝色、绿色和红色器件性能，显示出最先进的发光效率为 5.6、21.6 和 4.4 cd A–1，CIE 坐标为 (0.16, 0.16)、(0.32, 0.60) 和 (0.32, 0.60) 和分别为（0.61，0.34）。结果清楚地表明，咔唑官能化的聚螺二芴是构建适用于 PLED 的高效多色聚合物的有前景的平台。
Based on a carbazole-functionalized polyspirobifluorene with high fluorescence quantum yield and deep-blue emission, a series of blue-, green-, and red-emitting polymers have been successfully developed by independently incorporating dibenzothiophene-S,S-dioxide (3,7SO), 4,7-diphenylbenzothiadiazole (DPBT), and 4,7-dithienylbenzothiadiazole (DTBT) as the copolymerized units to tune the emission color in the whole visible region. The effect of their loadings on the electrochemical, photophysical, and electroluminescent properties is investigated in detail. It is found that PCzSF-3,7SO15, PCzSF-DPBT15, and PCzSF-DTBT03 show the best blue, green, and red device performance, revealing state-of-the-art luminous efficiencies of 5.6, 21.6, and 4.4 cd A–1 along with CIE coordinates of (0.16, 0.16), (0.32, 0.60), and (0.61, 0.34), respectively. The results clearly indicate that the carbazole-functionalized polyspirobifluorene is a promising platform to construct high-efficiency multicolor polymers suitable for PLEDs.