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基于红绿/蓝双发光层,制作了结构为ITO/MoO3(10nm)/NPB(40nm)/TCTA(10nm)/CBP:R-4B(2%):GIR1(14%,X nm)/mCP:Firpic(8%,Y nm/BCP(10nm)/Alq3(40nm)/LiF(1nm)/Al(100nm)的白色全磷光有机电致发光器件(OLED),通过调节红绿发光层的厚度X与蓝光发光层的厚度Y,研究了不同发光层厚度器件发光性能的影响。研究发现:当X为23nm、Y为7nm时,器件的光效和色坐标都具有很高的稳定性,在电压分别为5、10和15 V时,色坐标分别为(0.33,0.37)、(0.33,0.37)和(0.34,0.38);在电压为5V时,电流密度为0.674mA,亮度为158.7cd,最大电流效率为26.87cd/A;利用电子阻挡材料TCTA和空穴阻挡材料BCP能够显著提高载流子的复合效率。分析认为:发光层顺序为红绿/蓝时,更有利于蓝光的出射,从而使白光的色坐标更稳定。
The structure of ITO / MoO3 (10 nm) / NPB (40 nm) / TCTA (10 nm) / CBP: R- 4B (2%): GIR1 (14%, X nm) / mCP : A white full phosphorescent organic electroluminescent device (OLED) of Firpic (8%, Y nm / BCP (10 nm) / Alq3 (40 nm) / LiF (1 nm) / Al And the thickness of the blue light-emitting layer Y. The research shows that when the X is 23nm and the Y is 7nm, the device’s light efficiency and color coordinates have high stability. Under the voltage (0.33,0.37), (0.33,0.37) and (0.34,0.38) respectively at 5, 10 and 15 V. At a voltage of 5 V, the current density is 0.674 mA, the brightness is 158.7 cd, and the maximum The current efficiency is 26.87cd / A, and the electron carrier material TCTA and hole-blocking material BCP can significantly improve the carrier recombination efficiency.The analysis shows that when the light-emitting layer is red, green, and blue, it is more conducive to the blue light emission Make white color coordinates more stable.