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本文利用色转换方法,将高效的蓝色柔性有机电致发光器件(flexible organic light emitting devices,FOLEDs)与色转换材料(color conversion material,CCM)相结合,制备了柔性白色有机电致发光器件(white organic light emittingdevices,WOLEDs).首先利用2,3,5,6-Tetrafluoro-7,7,8,8-tetracyano-quinodimethane(F4-TCNQ)和4,4′,4″-tris-(N-3-methylphenyl-N-phenylamino)tripheny-lamine(m-MTDATA)组成的多量子阱(multiple quantum well,MQW)结构作为空穴注入层(hole injection layer,HIL)结合新型蓝光材料N~6,N~6,N~(12),N~(12)-tetrap-tolylchrysene-6,12-diamine(NCA)制备出高效的蓝光FOLEDs,然后将其与色转换材料4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB)结合,通过沉积不同厚度的CCM来优化白光器件的发光光谱,获得了色稳定性较高的白光.实验结果表明:在驱动电压为7 V,DCJTB的厚度为120 nm时得到较接近白光等能点的色坐标(0.33,0.27),且当驱动电压由6 V升至11 V时,器件的色坐标变化仅为(30.02,±0.02),表现出高色稳定性.
In this paper, a color conversion method, a flexible and efficient blue light emitting organic electroluminescent device (flexible organic light emitting devices, FOLEDs) and the color conversion material (color conversion material, CCM) in combination, a preparation of a flexible white organic electroluminescent device ( white organic light emittingdevices, WOLEDs). Firstly, 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyano-quinodimethane (F4-TCNQ), and 4,4 ', 4 "-tris- (N- 3-methylphenyl-N-phenylamino) tripheny-lamine (m-MTDATA) as a hole injection layer (HIL) combined with a novel blue light material N ~ 6, N ~ 6, N ~ (12), N ~ (12) -tetrap-tolylchrysene-6,12-diamine (NCA) prepared in a highly efficient blue FOLEDs, then the color conversion material with 4- (dicyanomethylene) -2-tert -butyl-6- (1,1,7,7-tetramethyljulolidyl-9-enyl) -4H-pyran (DCJTB) in combination, to optimize the light emission spectrum of white light emitting device by depositing different thicknesses CCM obtained high color stability . the results showed that white light: to obtain color coordinates (0.33,0.27) and the like can be closer to white point when the drive voltage of 7 V, a thickness of DCJTB was 120 nm, and when the drive When the dynamic voltage is increased from 6 V to 11 V, the color coordinate of the device changes only (30.02, ± 0.02), showing high color stability.