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中文摘要：
利用有机发光材料N，N’-bis-（1-naphthyt）N，N’-diphenyl-1，1’-biphenyl-4，4＇-diamine（NPB）作为空穴传输层。4,4-dis（2，2’diphenytvinyl）-1，1’-biphenyl（DPVBi）作为发光层，aluminium-tris-8-hydroxy—quinoline（Alq3）作为电子传输层。采用ITO／NPB／DPVBi／Alq3／LiF／Al基本结构，研究了NPB厚度对蓝光有机器件（OLED）的亮度和效率的影响。在DPVBi、Alq3、LiF和Al分别保持在20、30、0．5和100nm不变。而NPB在40、50…和150nm内进行变化，在NPB小于130nm而大于40nm内，亮度随厚度的增加而增加，最大亮度达到6891cd／m^2，对应的效率是1．64cd／A，而色（CIE）坐标的变化范围较小，获得了性能较好的蓝光OLED。
英文摘要：
The paper studies the effect of different thickness of N, N＇-bis-（1-naphthyl）-N, N＇-diphenyl-1, 1＇-biphenyl-4,4＇-diamine（NPB） on the performance of blue organic light-emitting deodes（OLEDs）. In the experiments NPB is adopted as hole transport layer 4,4＇- dis（2,2＇ diphenylvinyl）-1,1＇-biphenyl （DPVBi） is an excellent blue dye for OLEDs. We have fabricated the device with structure of ITO/NPB/DPVBi/Alq3 LiF/Al. The performance of the blue OLEDs has been improved by adjusting the thickness of NPB layer. When the thickness of hole transport layer is between 130 nm and 40 nm, the brightness increases with thickness increasing. The thickness of NPB, DPVBi, Alq3, LiF, Al are 130 nm, 20 nm, 30 rim,0.5 nm, 100 nm respectively,and the maximum brightness and efficiency reach 6 891 cd/m^2, 1.64 cd/A respectively.
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