Four‐Coordinate Organoboron Platforms for Efficient Red Phosphorescent Organic Light‐Emitting Diodes
作者:Xiang‐Yang Liu、Yi‐Jie Zhang、Xiyu Fei、Man‐Keung Fung、Jian Fan
DOI:10.1002/cplu.201900406
日期:2019.10
four-coordinate organoboron compounds, namely 8-(4-(9H-carbazol-9-yl)phenyl)-6,6-difluoro-6H-6λ4 ,7λ4 -benzo[4',5']imidazo[1',2':3,4][1,3,2]diazaborolo[1,5-a]pyridine (B1PCz) and 8-(3-(9H-carbazol-9-yl)phenyl)-6,6-difluoro-6H-6λ4 ,7λ4 -benzo[4',5']imidazo[1',2':3,4][1,3,2]diazaborolo[1,5-a]pyridine (B1MCz), were successfully designed, synthesized, and fully characterized. The red OLEDs using B1PCz and B1MCz
迄今为止,三配位和四配位的有机硼化合物已广泛应用于有机发光二极管(OLED)材料中。然而,很少报道使用四配位有机硼化合物作为主体材料。在这项工作中,两个新的四配位有机硼化合物,即8-(4-(9H-咔唑-9-基)苯基)-6,6-二氟-6H-6λ4,7λ4-苯并[4',5']咪唑并[1',2':3,4] [1,3,2]重氮硼硼烷[1,5-a]吡啶(B1PCz)和8-(3-(9H-咔唑-9-基)苯基)-6 ,6-二氟-6H-6λ4,7λ4-苯并[4',5']咪唑[1',2':3,4] [1,3,2]重氮硼硼烷[1,5-a]吡啶(B1MCz)已成功设计,合成并充分表征。使用B1PCz和B1MCz作为主体材料的红色OLED达到了相对较高的器件性能,最大外部量子效率分别为14.8%和11.8%。