A Top-Emitting Organic Light-Emitting Diodes （TEOLEDs） with the configurations of Al （100 nm）/TAPC （x nm）/TCTA （10 nm）/TCTA：Ir（ppy）₃ （10%， 25 nm）/TPBi （30 nm）/LiF （2 nm）/Al （1 nm）/Ag （20 nm）/Alq₃ （y nm） （x=30， 130， 160， 170 and 180） （y=20， 40， 60 and 80） was fabricated. The experiments illustrate that photoelectric performance of the device can be improved by changing the thickness of the hole transport layer， which make the length of the device microcavity was in the enhancement zone of second-order microcavity effect. Moreover， by changing the light output coupling layer of the device， the transmittance and reflectance of the cathode of the device were changed， which can effectively improve the photoelectric performance of the device. A green TEOLEDs with the best photoelectric performance is achieved when the length of microcavity is 230 nm and the thickness of optical output coupling is 80 nm. The peak luminance， peak current efficiency and peak power efficiency of the TEOLEDs reach 25 960 cd/m²， 19.1 cd/A and 16.01 lm/W， respectively.