为非掺杂蓝色有机发光器件量身定制扭曲二氢苯并二恶英菲并咪唑衍生物的分子设计。
Tailoring the molecular design of twisted dihydrobenzodioxin phenanthroimidazole derivatives for non-doped blue organic light-emitting devices.
作者信息
Jayabharathi Jayaraman, Ramya Ramaiyan, Thanikachalam Venugopal, Nethaji Pavadai
机构信息
Department of Chemistry, Annamalai University Annamalai Nagar Tamilnadu-608 002 India.
出版信息
RSC Adv. 2018 Aug 14;8(51):29031-29043. doi: 10.1039/c8ra05004j.
Three fused polycyclic aryl fragments, namely, naphthyl, methoxynaphthyl, and pyrenyl have been used to construct blue-emissive phenanthroimidazole-functionalized target molecules, , 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(naphthalen-1-yl)-1-phenanthro[9,10-]imidazole (1), 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(1-methoxynaphthalen-4-yl)-1-phenanthro[9,10-]imidazole (2), and 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(pyren-10-yl)-1-phenanthro[9,10-]imidazole (3). The up-conversion of triplets to singlets a triplet-triplet annihilation (TTA) process is dominant in these compounds due to 2 > . The pyrenyl dihydrobenzodioxin phenanthroimidazole (3)-based nondoped OLED exhibits blue emission (450 nm) with CIE (0.15, 0.14), a luminance of 53 890 cd m, power efficiency of 5.86 lm W, external quantum efficiency of 5.30%, and current efficiency of 6.90 cd A. The efficient device performance of pyrenyl dihydrobenzodioxin phenanthroimidazole is due to the TTA contribution to the electroluminescent process.
三个稠合的多环芳基片段，即萘基、甲氧基萘基和芘基，已被用于构建蓝色发光的菲并咪唑官能化目标分子，1-(2,3-二氢苯并[][1,4]二恶英-6-基)-2-(萘-1-基)-1-菲并[9,10-]咪唑(1)、1-(2,3-二氢苯并[][1,4]二恶英-6-基)-2-(1-甲氧基萘-4-基)-1-菲并[9,10-]咪唑(2)和1-(2,3-二氢苯并[][1,4]二恶英-6-基)-2-(芘-10-基)-1-菲并[9,10-]咪唑(3)。由于2>，三线态到单线态的上转换（一种三线态-三线态湮灭（TTA）过程）在这些化合物中占主导地位。基于芘基二氢苯并二恶英菲并咪唑(3)的非掺杂有机发光二极管呈现出蓝色发射（450nm），CIE为(0.15,0.14)，亮度为53890cd m，功率效率为5.86lm W，外量子效率为5.30%，电流效率为6.90cd A。芘基二氢苯并二恶英菲并咪唑的高效器件性能归因于TTA对电致发光过程的贡献。
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