The Fabrication of the White Organic Light Emitting Devices by varying the Doping Concentrations of DCM in ITO/$\alpha$-NPD:DCM/$\alpha$-NPD/BCP/$Alq_3$/Al

ITO/$\alpha$-NPD:DCM/$\alpha$-NPD/BCP/$Alq_3$/Al 구조에서의 DCM의 도핑농도에 따른 유기 백색발광소자 구현

In this study, the white organic light emitting device was fabricated using ITO/a-NPD:DCM/a-NPD/BCP/Alq3/Al structure. Blue emission by a-NPD and orange emission by energy transfer between a-NPD and DCM embodied the white emission. The optimal structure of the white OLED is ITO/a-NPD:DCM(50$\square$)/a-NPD(150$\AA$)/BCP(100$\square$)/Alq$_3$(200$\square$)/Al. We varied the doping concentration of DCM properly and obtained high purity white emitting light. The CIE coordinate and maximum luminance of the devices was obtained (0.310, 0.333) and 400cd/$m^2$ at 11Volt.