中文摘要：

讨论了基于蓝色荧光染料DSA-ph作为发光层的蓝色有机电致发光器件,器件结构为：ITO/2T-NATA/NPBX/DSA-ph（xnm）/TAZ/Bphen/LiF/Al。通过改变DSA-ph的超薄层厚度,相应器件的性能指标也有所不同。研究表明,在超薄层厚度为0.5nm,驱动电压为4V时,器件的最大发光效率为6.57cd/A;在超薄层厚度为0.3nm时,驱动电压为10V时,器件的最大亮度为5 122cd/m^2。器件的色坐标在（0.17,0.36）附近,属于蓝光发射。

英文摘要：

It was discussed the blue organic light-emitting device with the structure of ITO/2T-NATA/ NPBX/DSA-ph（xnm）/TAZ/Bphen/LiF/Al,which uses blue fluorescence dye DSA-phacting as the emitting layer.By changing the thickness of the emitting layer,different performance indexes can be obtained.It is conclude that the maximum lighting efficiency is 6.57 cd/A when the emitting layer is 0.5 nm thick and the driving voltage is 4 V.The maximum luminance reaches 5122 cd/m^2 when the emitting layer was 0.3 nm thick under the driving voltage of 10 V.The CIE coordinates are（0.17,0.36）,which belong to blue light emission.