RGB Small Molecules Based on a Bipolar Molecular Design for Highly Efficient Solution-Processed Single-layer OLEDs
作者:Liang Yao、Shanfeng Xue、Qi Wang、Wenyue Dong、Wei Yang、Hongbin Wu、Ming Zhang、Bing Yang、Yuguang Ma
DOI:10.1002/chem.201101476
日期:2012.2.27
In this paper, we describe a bipolar molecular design for small molecule solution‐processed organic light emitting diodes (OLEDs). Combining the rigidity of the conjugated emissive cores and the flexibility of the peripheral alkyl‐linked carbazole groups, two series of highly efficient bipolar RGB (red, green, blue) emitters have been synthesized and characterized. The emissive cores are composed of
在本文中,我们描述了用于小分子溶液处理的有机发光二极管(OLED)的双极分子设计。结合共轭发射核的刚度和外围烷基连接的咔唑基团的柔韧性,合成并表征了两个系列的高效双极性RGB(红色,绿色,蓝色)发射器。发射核由吸电子基团组成。咔唑基团赋予材料给电子单元。这种双极结构对于载流子注入和平衡是有利的。在T系列材料(TCDqC,TCSoC,TCBzC,TCNzC)中引入了四个外围咔唑基团,在O系列材料(OCDqC,OCSoC,OCBzC,OCNzC)中引入了另外四个咔唑基团。使用ITO / PEDOT:PSS /发光层/ CsF / Al的单层设备配置,-1和大于6700 cd m -2的高最大亮度。此外,与T系列产品相比,基于O系列材料的蓝色和红色设备的发光效率分别从1.6 cd A -1增至2.8 cd A -1和0.2 cd A -1增至1.3 cd A -1。据我们所知,到目前为止,基于O