A novel anode structure of organic light-emitting diode(OLED) was fabricated by inserting a molybdenum trioxide(MoO3) layer into the interface between the hole injection layer(HIL) 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile(HAT-CN) and the hole transport layer 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl(NPB).The OLED with a 150 nm-thick Al top cathode and a transparent Al bottom anode on a glass substrate was fabricated.It has the configuration of Glass/Al(15 nm)/HAT-CN(10 nm)/ MoO3(30 nm)/NPB(30 nm)/Alq3(60 nm)/ Bphen(X nm)/LiF(1 nm)/Al(150 nm).We used Bphen to replace Alq3 as the electron transport layer,which is beneficial to the reduction of the driving voltage and the enhancement of the luminance.The highest luminance of the device reaches 15 128 cd/m2 at 13 V,with a turn on voltage of 3.1 V.The luminance efficiency is increased by nearly three times with Bphen as electron transport layer(ETL) compared with that with Alq3.