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采用poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b’]dithiophene-2,6-diyl][3-?uoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]](PTB7)作为有机发光二极管器件的阳极修饰层,制备了结构为indium tin oxide(ITO)/PTB7(不同浓度)/N,N’-Bis(naphthalen-1-yl)-N,N’-bis(phenyl)benzidine(NPB,40 nm)/8-hydroxyquinoline(Alq3,60 nm)/LiF(1 nm)/Al的系列器件,同时研究了不同浓度的PTB7对器件性能的影响.PTB7的最佳浓度为0.25 mg/mL,器件性能得到明显的改善,起亮电压为4.3 V.当驱动电压为14.6 V时,最大亮度为45800 cd/m2,最大电流效率为9.1 cd/A.与没有PTB7修饰的器件相比,其起亮电压降低了1.9 V,最高亮度提升了78.5%.器件性能提高归因于PTB7的插入使得空穴注入和传输能力大大改善.
Poly [[4,8-bis [(2-ethylhexyl) oxy] benzo [1,2-b: 4,5-b ’] dithiophene-2,6-diyl] (PTB7) as anode modified layer of organic light-emitting diode (OLED) device was prepared with indium tin oxide (ITO) / PTB7 / N, N ’-Bis (naphthalen-1-yl) -N, N’-bis (phenyl) benzidine (NPB, 40 nm) / 8-hydroxyquinoline (Alq 3,60 nm) / LiF The effects of different concentrations of PTB7 on the performance of the devices were studied.The optimal concentration of PTB7 was 0.25 mg / mL, the device performance was significantly improved, the starting voltage is 4.3 V. When the driving voltage is 14.6 V, the maximum brightness is 45800 cd / m2, the maximum current efficiency of 9.1 cd / A. Compared with the device without the modification of PTB7, the startup voltage is reduced by 1.9 V and the maximum brightness is improved by 78.5%. The improvement of the device performance is attributed to the insertion of PTB7 to make hole injection And transmission capacity is greatly improved.