New Fluorescent Blue OLED Host and Dopant Materials Based on the Spirobenzofluorene
作者:In-Ho Lee、Myoung-Seon Gong
DOI:10.5012/bkcs.2011.32.5.1475
日期:2011.5.20
New spiro[benzo[c]fluorene-7,9'-fluorene] (SBFF)-based blue host materials, 9-phenyl-SBFF (BH-4P) and 5,9-diphenyl-SBFF (BH-6DP), were successfully prepared by spiro-formation of 9-phenyl-7H-benzo[c]fluoren-7-one with 2-bromobiphenyl via lithiation and reaction of 5,9-dibromo-SBFF with phenylboronic acid through the Suzuki reaction, respectively. Diphenyl-[4-(2-[1,1;4,1]terphenyl-4-yl-vinyl)-phenyl]-amine (BD-1) and N,N-diphenyl-N',N'-diphenyl-SBFF-5,9-diamine (BD-6DPA) were used as dopant materials. Blue OLEDs with the configuration ITO/N,N'-bis-[4-(di-m-tolylamino)phenyl]-N,N'-diphenylbiphenyl-4,4'-diamine (DNTPD)/bis[N-(1-naphthyl)-N-phenyl]benzidine (NPB)/host:5% dopant/SFC-137/Al-LiF were prepared from the two host materials doped with BD-1 and BD-6DPA dopants and the devices composed of BH-4P and BH-6DP doped with BD-6DPA showed blue EL spectra at 458 and 463 nm at 7 V and luminance efficiencies of 4.58 and 4.88 cd/A, respectively.
9-苯基-SBFF(BH-4P)和 5,9-二苯基-SBFF(BH-6DP)分别通过 9-苯基-7H-苯并[c]芴-7-酮与 2-溴联苯的石化作用和 5,9-二溴-SBFF与苯硼酸的铃木反应,成功制备了新型螺[苯并[c]芴-7,9'-芴](SBFF)基蓝色宿主材料。二苯基-[4-(2-[1,1;4,1]三联苯-4-基-乙烯基)-苯基]胺(BD-1)和 N,N-二苯基-N',N'-二苯基-SBFF-5,9-二胺(BD-6DPA)被用作掺杂剂材料。蓝色 OLED 的配置为 ITO/N,N'-双[4-(二间甲苯氨基)苯基]-N,N'-二苯基联苯-4,4'-二胺(DNTPD)/双[N-(1-萘基)-N-苯基]联苯胺(NPB)/宿主:5%掺杂剂/SFC-137/Al-LiF制备了掺有BD-1和BD-6DPA掺杂剂的两种宿主材料,由掺有BD-6DPA的BH-4P和BH-6DP组成的器件在7 V电压下显示出458和463 nm波长的蓝色EL光谱,发光效率分别为4.58和4.88 cd/A。58 和 4.88 cd/A。