Silver is a potential candidate of flexible transparent electrode materials due to its excellent conductivity,malleability and ease preparation.Ag thin films with different thicknesses (6 nm,10 nm,14 nm,18 nm,20 nm,24 nm) were prepared by vacuum thermal evaporation.Because of the combined effect of light scattering and absorption,the transmittance decreased first,then increased,and then decreased with the increase of thickness.When the thickness of Ag film was 18 nm,the best transmittance was about 60%.Meanwhile,the surface resistance decreased gradually with the increase of thickness.In order to improve the transmittance of Ag film,molybdenum trioxide (MoO3) with high refractive index of 2.1 was introduced to modify Ag film to prepare MoO3/Ag/MoO3 (MAM) multilayer film.The results show that the introduction of MoO3 smoothes the surface of Ag film,reduces the surface resistance and improves the conductivity.More importantly,the refractive index coupling occurs at the MoO3/Ag interface,which greatly improves the overall transmittance of the multilayer,and the transmittance generally increases by at least 10%.When the thickness of Ag is 14 nm,the transmittance of MAM multilayer is the best,up to 70 %.Finally,the feasibility of silver transparent electrode was verified in a green organic light-emitting diode (OLED).