覆盖层对顶发射白光微型OLED性能的影响研究

采用两种覆盖层CPL(Capping layer)材料Alq3和ZnSe制备了顶发射白光有机电致发光器件TE-OLEDs(Top emitting white organic light-emitting diodes),器件结构为ITO/NPB:LiQ(5%)(10 nm)/TCTA(20nm)/FIrpic+3.5%Ir(ppy)3+0.5%Ir(MDQ)2(acac)(25nm)/TPBI(10nm)/LiF(5nm)/Mg:Ag(10%)(12 nm)/CPL。实验结果表明,Alq3和ZnSe作为CPL可以增强TE-OLED器件的出光和调制光谱特性,并且ZnSe作为覆盖层制备的TE-OLED器件色坐标(CIEX,CIEY)随亮度变化更平稳,表现出良好的色稳定性。进一步,通过改变ZnSe厚度来优化器件,当ZnSe为45 nm时,器件获得了最佳的亮度和电流效率,分别为1461 cd/cm2和7.38 cd/A,色坐标为(0.30,0.33)。

A comparison on urbanization of two mega-polises in western China in recent 20 years

Based on a comparison of the spatial extension modulus and speed of the two mega-polis cities in western China, Chongqing and Chengdu, the differences of urbanization characteristics of the two cities were analyzed. The results show that the two cities have different spatial extension modulus and extension speed. The extension speed of Chongqing, the largest mountainous city of China, was slow and its extension direction was along the Yangtze River valley and the Jialing River valley. Chengdu, the largest plain city of western China, had a faster extension speed than Chongqing and a concentric circles extent modulus. The spatial extent modulus and speed were controlled by the natural condition, especially the topography, the policies, the economic development level and the investment of the state central government.

基于纹理的图像修复的技术的研究

如今人们对图像质量要求的越来越高,采用计算机辅助能够更加精密和准确的还原原图像的信息。本文主要是针对图像中部分信息破损的修复进行研究,采用了基于纹理的图像修复算法对具有较大的破损区域的图像进行了修复,通过对CIEI(Cross Isophotes Exemplar-based Inpainting)算法的改进,使其对恢复难度大的纹理丰富图像的修复具有更好的适用性。测试实验结果表明,获得了良好的恢复效果。