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主要研究了NPB厚度对堆叠式白色有机电致发光器件性能的影响。实验制备了四组结构为ITO/2-TNATA(15 nm)/NPB(Tnm)/ADN(30 nm):TBPe(2%):DCJTB(1%)/Alq3(20 nm)/LiF(1 nm)/Al(100 nm)(其中T分别为15,30,35和40 nm)的OLED器件,比较了不同厚度情况下OLED器件的电致发光特性,结果表明:改变NPB(4,4-N,N-bis-N-1-naphthy1-N-pheny1-amino-bipheny1)的厚度能够明显提高器件的发光亮度和发光效率,并调节载流子复合区域的位置,有效提高载流子的注入效果。同时发光器件的颜色也可通过调节NPB层的厚度来改变,这种器件使用NPB作为空穴传输层显示出了色纯度高、亮度好、效率较高的白光发射,其具有CIE色坐标(x=0.301 6,y=0.338 5),最高亮度和最大发光效率分别达到14 020 cd/m2与2.94 lm/W。
The effects of NPB thickness on the performance of stacked white organic electroluminescent devices are mainly studied. Four groups of structures were prepared: ITO / 2-TNATA (15 nm) / NPB (Tnm) / ADN at 30 nm: TBPe 2% DCJTB 1% / Alq3 20 nm / ) / Al (100 nm) (where T is 15, 30, 35 and 40 nm, respectively). The electroluminescent properties of OLED devices under different thicknesses were compared. , The thickness of N-bis-N-1-naphthy1-N-pheny1-amino-bipheny1 can significantly improve the luminescence intensity and luminous efficiency of the device and adjust the position of carrier recombination region to effectively improve the injection effect of carriers . At the same time, the color of the light emitting device can also be changed by adjusting the thickness of the NPB layer. The device uses NPB as a hole transport layer and displays white light emission with high color purity, high brightness and high efficiency, and has the CIE color coordinates = 0.301 6, y = 0.338 5), the maximum brightness and maximum luminous efficiency reached 14 020 cd / m2 and 2.94 lm / W, respectively.