Unexpected Propeller-Like Hexakis(fluoren-2-yl)benzene Cores for Six-Arm Star-Shaped Oligofluorenes: Highly Efficient Deep-Blue Fluorescent Emitters and Good Hole-Transporting Materials
作者:Yang Zou、Jianhua Zou、Tengling Ye、Hao Li、Chuluo Yang、Hongbin Wu、Dongge Ma、Jingui Qin、Yong Cao
DOI:10.1002/adfm.201202286
日期:2013.4.12
Grafting six fluorene units to a benzene ring generates a new highly twisted core of hexakis(fluoren‐2‐yl)benzene. Based on the new core, six‐arm star‐shaped oligofluorenes from the first generation T1 to third generation T3 are constructed. Their thermal, photophysical, and electrochemical properties are studied, and the relationship between the structures and properties is discussed. Simple double‐layer
将六个芴单元接枝到苯环上会生成一个新的高度扭曲的六(芴-2-基)苯核。基于新的核,构建了从第一代T1到第三代T3的六臂星形低聚芴。研究了它们的热,光物理和电化学性质,并讨论了结构和性质之间的关系。使用简单的双层电致发光(EL)器件T1-T3作为非掺杂的溶液处理的发射体显示与深蓝色排放委员会国际歌DE L'的(0.17,0.08),用于照明协会(CIE)坐标T1,(0.16,0.08 )(对于T2而言)和(0.16,0.07)对于T3。这些器件具有出色的性能,最大电流效率高达5.4 cd A -1,最大外部量子效率高达6.8%,这是未掺杂溶液处理的深蓝色有机发光二极管的最高效率。 (OLED)基于星爆低聚芴,甚至可以与其他溶液处理的深蓝色荧光OLED媲美。此外,基于T2和T3的器件显示出惊人的蓝色EL颜色稳定性,而与驱动电压无关。此外,使用T0–T3作为空穴传输材料,可制成氧化铟锡(ITO)/聚(3