Simultaneous harvesting of triplet excitons in OLEDs by both guest and host materials with an intramolecular charge-transfer feature via triplet–triplet annihilation
作者:Xujun Zheng、Qiming Peng、Jie Lin、Yi Wang、Jie Zhou、Yan Jiao、Yuefeng Bai、Yan Huang、Feng Li、Xingyuan Liu、Xuemei Pu、Zhiyun Lu
DOI:10.1039/c5tc00779h
日期:——
A red naphthalimide derivative with an intramolecular charge-transfer (ICT) feature, namely (E)-2-(4-(t-butyl)phenyl)-6-(2-(6-(diphenylamino)naphthalen-2-yl)vinyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione (NA-TNA), was designed and synthesized. Photophysical and magneto-electroluminescence (MEL) characterization results revealed that NA-TNA could harvest triplet excitons via a triplet–triplet annihilation
具有分子内电荷转移(ICT)特征的红色萘二甲酰亚胺衍生物,即(E)-2-(4-(叔丁基)苯基)-6-(2-(6-(二苯基氨基)萘-2-基)设计并合成了乙烯基)-1 H-苯并[ de ]异喹啉-1,3(2 H)-二酮(NA-TNA)。光物理和磁电致发光(MEL)表征结果表明,由于存在较低的三重态激发态,NA-TNA可以通过三重态-三重态an灭(TTA)过程在有机发光二极管(OLED)中收获三重态激子。具有3个ππ*字符。因此,使用NA-TNA作为客体化合物和CzPhONI(另一种具有ICT功能的具有三重态融合延迟荧光(TFDF)特性的ICT的萘酰亚胺衍生物)作为主体材料,获得了一种高性能橙色OLED,其具有6 wt%的NA-TNA掺杂的CzPhONI膜作为发光层。最大电流效率(LE最大),亮度(大号最大值),和外部量子效率(EQE最大此OLED的)是7.73光盘-1,31 940 CD米-2和5