Based on green optical device ITO/HAT-CN/TAPC/CBP∶Ir(ppy)3/TmPyPB/Liq/Al, the influence of doping ratio of different concentrations of Yb on device performance is studied by doping different concentrations of Yb in Liq as modified electrode of electron injection layer. The research shows that the doping of Yb in Liq can effectively improve the photoelectric performance of the device. When the doping ratio of Yb is 1.85%, the device performance is the best. Under the condition of 0.25 mA/cm2, the starting voltage is 3.65 V, the maximum brightness is 26 720 cd/m2, the maximum current efficiency is 87.07 cd/A, the maximum power efficiency is 74.89 lm/W, and the maximum external quantum efficiency is 24.07%. Compared with the reference device, the maximum brightness increases by 2 181 cd/m2, the maximum current efficiency increases by 18.42 cd/A, the maximum power efficiency increases by 10.6 lm/W, and the maximum external quantum efficiency increases by 5.27%.