Highly efficient blue thermally activated delayed fluorescence organic light emitting diodes based on tercarbazole donor and boron acceptor dyads
作者:Durai Karthik、Dae Hyun Ahn、Jae Hong Ryu、Hyuna Lee、Jee Hyun Maeng、Ju Young Lee、Jang Hyuk Kwon
DOI:10.1039/c9tc05950d
日期:——
9′′H-3,3′:6′,3′′-tercarbazole (M3CzB), for application in highly efficient organic light-emitting diodes are reported. These emitters consist of tercarbazole as donor and rigid oxygen bridged boron as acceptor units. Despite having the same donor and acceptor segments, an alkyl modification on the periphery of the donor and acceptor units altered their physicochemical properties and the electrochemical
两个新的蓝色TADF发射体,即9'-(2,12-二叔丁基-5,9 - dioxa -13 b-硼萘并[3,2,1- de ]蒽-7-yl)-9, 9'' -二苯基- 9 ħ,9' ħ,9'' ħ -3,3':6',3'' - tercarbazole(3CzTB)和9' - (5,9-二氧杂- 13 b -boranaphtho [ 3,2,1德]蒽-7-基)-6,6-'' -二甲基9,9'' -二苯基- 9 ħ,9' ħ,9'' ħ -3,3':6' ,3''-叔咔唑(M3CzB),报道了在高效有机发光二极管中的应用。这些发射体由作为原料的叔咔唑和作为受体单元的刚性氧桥联硼组成。尽管具有相同的供体和受体链段,但在供体和受体单元外围的烷基修饰改变了它们的物理化学性质和发射体的电化学稳定性。用这些发射器制造的蓝色TADF发光器件对于M3CzB和3CzTB分别表现出最大外部量子效率(EQE)和亮度分别为30