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制备了三种结构的白色有机电致发光器件,通过比较得出:在发光层中间插入2,9-二甲基-4,7-二苯基-1,10-菲咯啉(BCP)能有效控制载流子在不同发光层的分布,进而对器件色度进行调节;而掺杂磷光染料Ir(ppy)3作敏化剂能有效提高器件的效率.结构为:氧化铟锡/聚乙烯基咔唑∶N,N′-二(1-萘基)-N,N′-二苯基-1,1′-联苯-4-4′-二胺(30nm)/二-(2-甲基-8-羟基喹啉)-4-联苯酚铝:3.0wt%2,5,8,11-tetra-tertbutylperylene(TBPe)(30nm)/BCP(5.0nm)/4,4N,N二咔唑基二苯:5.0wt%Ir(ppy)3:2.0wt%红荧烯(15nm)/BCP(10nm)/Mg:Ag的器件色度和效率俱佳.其在17V工作电压下具有的亮度为4670cd/m2,对应色坐标为(0.31,0.37).器件具有的最大外量子效率为1.4%,当驱动电压从5.0V升高到17V,器件色坐标严格位于白光色域区内.
Three kinds of white organic electroluminescent devices with different structures were prepared. By comparison, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) Which can effectively control the carrier distribution in different light-emitting layers and then adjust the device chromaticity. The doping phosphorescent dye Ir (ppy) 3 can effectively improve the device efficiency.The structure is: indium tin oxide / polyethylene Carbazoles: N, N’-bis (1-naphthyl) -N, N’-diphenyl- 1,1’- biphenyl- 4’- diamine (30 nm) / di- Methyl-8-quinolinolato) -4-biphenylalanine 3.0 wt% 2,5,8,11-tetra-tertbutylperylene (TBPe) (30 nm) / BCP Zirconyl azobenzene: 5.0wt% Ir (ppy) 3: 2.0wt% rubrene (15nm) / BCP (10nm) / Mg: Ag devices have excellent chromaticity and efficiency at 17V operating voltage with the brightness Is 4670cd / m2, the corresponding color coordinate is (0.31,0.37). The maximum external quantum efficiency of the device is 1.4%. When the driving voltage is increased from 5.0V to 17V, the color coordinate of the device is strictly located in the white color gamut.