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 of the three materials in solution and in a film were shortest for o-DPAC and longest for p-DPAC. The highly twisted structure of o-DPAC showed the narrowest FWHM (47 nm) in the deep blue region with a PL_max of 449 nm in the film state. The three synthesized materials showed excellent thermal stability with a high T_d over 370 °C. EML was applied to a non-doped OLED device considering the band gap of synthesized materials. Among the synthesized materials, the m-DPAC device achieved excellent EL performance of CIE x, y (0.14, 0.09), 4.89 cd/A, 3.60 lm/W, and an EQE of 6.18%.

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。