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P‐13.5: Influence of doping ratio of blue guest material on the lifetime of OLED (Organic Light Emitting Diode) display

As a new generation of display technology, OLED (Organic Light Emitting Diode)) has superior performance than LCD (liquid crystal display) .However, the lifetime of OLED devices, especially the blue OLED device, is short. In this paper, the influence of doping ratio of guest material and the homogeneity of blue light‐emitting layer (EML) on the device lifetime is studied. The data of seven experiments shows that the blue lifetime(T95) of the device reaches the peak at 516hr when the doping ratio of guest material in EML is 3%, and the calculated homogeneity is 2.6%. When the doping ratio reduces from 3% to 2%, blue lifetime(T95) is reduced by 10%, and when the doping ratio increases from 3% to 5%, blue lifetime(T95) is reduced by 32%. And when calculated homogeneity reduces from 26.6% to 2.6%, device lifetime(T95) increases by 28%