Kwon Hyukmin, Kang Seokwoo, Park Sangshin, Park Sunwoo, Lee Seungeun, Park Jongwook
Department of Chemical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
J Nanosci Nanotechnol. 2021 Jul 1;21(7):4000-4004. doi: 10.1166/jnn.2021.19238.
OLED light emitting materials have a molecular size corresponding to the nano scale and are converted into light energy when given electrical energy. The new green fluorescent dopant material was successfully synthesized by using anthracene as a central core and introducing a methyl group and tert-butyl group at various positions as diphenylamine group. Two compounds are N,N,N,N-tetraphenylanthracene-9,10-diamine (TAD) and N,N-bis(4-(tert-butyl) phenyl)-N,N-di-o-tolylanthracene-9,10-diamine (-Tb-o-Me-TAD). The synthesized material emits green light with the maximum wavelengths of 508 and 523 nm. -Tb-o-Me-TAD shows excellent PLQY of 86.2% in solution state. When the synthesized material was used as a dopant in a device, TAD showed current efficiency (CE) of 17.71 cd/A and external quantum efficiency (EQE) of 6.11%. The device using -Tb-o-Me-TAD dopant exhibited current efficiency (CE) of 24.24 cd/A and external quantum efficiency (EQE) of 7.27%.
OLED发光材料具有与纳米尺度相对应的分子大小，并且在给予电能时会转化为光能。以蒽为中心核，在不同位置引入甲基和叔丁基作为二苯胺基团，成功合成了新型绿色荧光掺杂剂材料。两种化合物分别是N,N,N,N-四苯基蒽-9,10-二胺（TAD）和N,N-双（4-（叔丁基）苯基）-N,N-二邻甲苯基蒽-9,10-二胺（-Tb-o-Me-TAD）。合成的材料发出绿光，最大波长分别为508和523nm。-Tb-o-Me-TAD在溶液状态下显示出86.2%的优异PLQY。当合成材料用作器件中的掺杂剂时，TAD的电流效率（CE）为17.71cd/A，外量子效率（EQE）为6.11%。使用-Tb-o-Me-TAD掺杂剂的器件表现出24.24cd/A的电流效率（CE）和7.27%的外量子效率（EQE）。
