Highly efficient chrysene emitters based on optimized side groups for deep blue emission
作者:Seokwoo Kang、Hayoon Lee、Hyocheol Jung、Minjin Jo、Mina Jung、Jongwook Park
DOI:10.1016/j.dyepig.2018.04.016
日期:2018.9
Diphenylamine substituted with methyl groups was used as a side group to realize high efficiency chrysene deep blue emitters. Three chrysene derivatives substituted with side groups were successfully synthesized: tetra-o-tolylchrysene-6,12-diamine (o-DPAC), tetra-m-tolylchrysene-6,12-diamine (m-DPAC), and tetra-p-tolyl-chrysene-6,12-diamine (p-DPAC). The maximum PL (Photoluminescence) emission wavelengths
以甲基取代的二苯胺为侧基,以实现高效率的深色深蓝色发光体。已成功合成了三个被侧基取代的丙烯衍生物:四-邻甲苯基-6,12-二胺(o-DPAC),四-间甲苯基-6,12-二胺(m-DPAC)和四-对-甲苯基甲苯基-6,12-二胺(p-DPAC)。溶液和薄膜中三种材料的最大PL(光致发光)发射波长对于o-DPAC最短,对于p-DPAC最长。o-DPAC的高度扭曲结构在深蓝色区域显示出最窄的FWHM(47 nm),在薄膜状态下的PL max为449 nm。三种合成材料显示出优异的热稳定性和高T d超过370°C。考虑到合成材料的带隙,将EML应用于非掺杂OLED器件。在合成材料中,m-DPAC器件具有出色的CIE x,y(0.14,0.09),4.89 cd / A,3.60 lm / W和EQE的EL性能。