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使用新型红光磷光材料R-4B作为微腔有机电致发光显示器(OLED)的发光层,高反射Al阴极和半透半反Al阳极为微腔的两端反射镜。制备的器件结构为Al(10nm)/MoOx(Ynm)/NPB(40nm)/TCTA(10nm)/CBP:R-4B(4%)(30nm)/BCP(10nm)/AlQ(40nm)/LiF(1nm)/Al(100nm)。讨论了腔长的变化对器件性能的影响。结果表明,微腔结构可以使光谱窄化,随着MoOx厚度Y的增加,其峰值波长由600nm增至668nm。当MoOx厚度为40nm时,其发光强度最大,峰值波长为608nm,半高宽(FWHM)为50nm,器件的最大亮度为35 300cd/cm2,最大效率可达23.5cd/A,得到了性能较好的红色磷光OLED。
The red-emitting phosphorescent material R-4B was used as a luminescent layer in a microcavity organic electroluminescent display (OLED). The highly reflective Al cathode and the transflective Al anode were both end mirrors with microcavities. The device structure was prepared as follows: Al (10nm) / MoOx (Ynm) / NPB (40nm) / TCTA (10nm) / CBP: R- 4B (4%) 30nm / BCP 10nm / AlQ 40nm / LiF 1 nm) / Al (100 nm). The influence of cavity length on device performance is discussed. The results show that the microcavity structure can narrow the spectrum, and the peak wavelength increases from 600nm to 668nm with the increase of the thickness Y of MoOx. When the thickness of MoOx is 40nm, its luminescence intensity is the highest, the peak wavelength is 608nm, the FWHM is 50nm, the maximum brightness of the device is 35 300cd / cm2 and the maximum efficiency is up to 23.5cd / A. Red phosphorescent OLED.