We investigate the effects of a transition layer on the performance of organic yellow electroluminescent (EL) device.The emitting layer structure was f abricated as CBP:10%R-4B/ CBP:10%GIrl,10%R-4B/CBP:10%GIrl.The contrast device emitting layer structure w as fabricated as CBP: 10%R-4B /CBP:10%GIrl.In order to study the influence of different structures of emitting layer on performance of the yellow organic light emitting diode (OLED) ,two contrast devices were fabricated,whose emitting layer structures are CBP:10% GIrl/CBP:10% GIrl10% R-4B/CBP:10%R-4B and CBP:10%GIrl/CBP:10%R-4B. The results show,the introduce of transition layer can significantly improve the bright- ness and current efficiency,which can reach 11120 c d/cm^2and 27.59 cd/A,respectively,265% and 56.18%,respectively compared with t he contrast device.