Abstract
P1-P6 derivatives are synthesized via Suzuki coupling reaction.Melting points of materials are between 320~450 ℃detected by DSC,and P2 is the only one having Tg (133℃)and Tm(215 ℃). Fluorescence's maxium wavelenth is 450 nm,external quantum efficiency of device: ITO/NPB or TPD/P1 or P2/TPBI/Mg:Ag, almost is 4.8 %, and CIE(0.15, 0.09) is closer to standard value of blue CRT (0.14, 0.09). Starting voltage is less than 3.5 VAnthraquinone derivatives SP1-SP7 have spiro structure designed for host materials.HOMO is closer to 6.0 eV.Energy gap is larger than 3.0 eV.We use green phosphorescent material pbi2Ir(pytz)、Irppy3, and red phosphorescent material BJ-9(mepp2Ir(acac) as dopant, device ITO/TCTA(30 nm)/dopant(5 %):SP1-SP7(30 nm)/BCP(10 nm)Mg:Ag has the best efficiency when host is SP1.P1P2can be used to make white OLED material.Device 4j can maintain steady white light between 6-12 V. External quantum efficiency is 2.9 %(11 V), CIE(0.32, 0.34), and max luminescence is 49002 cd/m2(14.5 V), current efficiency 6.9 cd/A, power efficiency 2.3 lm/W(8 V).