Transparent stacked organic light emitting devices. II. Device performance and applications to displays
Transparent stacked organic light emitting devices. II. Device performance and applications to displays
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DOI：
10.1063/1.371350
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发表时间：
1999-10-15
影响因子：
3.2
通讯作者：
Forrest, SR
中科院分区：
文献类型：
--
作者：
Gu, G;Parthasarathy, G;Forrest, SR
发射三原色的有机发光器件（oled）的垂直堆叠被证明是实现高效和明亮的全彩色显示的一种手段。在论文1中，我们讨论了堆叠OLED （SOLED）的设计和制造原理，以优化发射颜色，工作电压和效率。在这里，我们展示了两种不同的（含金属和无金属阴极）SOLED结构的结果，它们表现出适合许多全彩显示应用的性能。含金属SOLED的红色(R)、绿色(G)和蓝色(B)元件在10ma /cm(2)（对应视频显示亮度）下的工作电压分别为6.8、8.5和12.1 V。亚像素发光效率分别为0.53、1.44和1.52 cd/A，国际照明委员会（CIE）色度坐标分别为（0.72、0.28）、（0.42、0.56）和（0.20、0.22）。在高透明度无金属SOLED中，在两个上亚像素之间插入绝缘层，以允许堆叠中所有彩色发射器的独立接地。在12-14 V的工作电压下，R、G和B子像素的发光效率分别为0.35、1.36和1.05 cd/A，实现了视频显示亮度。在正常观测方向上，R、G和B发射的CIE坐标分别为（0.72,0.28）、（0.26,0.63）和（0.17,0.28），当观测角度增加到60度时，它们会发生难以察觉的变化。最后，我们讨论了SOLED显示器的寻址方案，并将其与其他实现全彩oled显示器的策略进行了比较。(C) 1999年美国物理研究所。[s0021 - 8979 (99) 03220 - x)。
Vertical stacking of organic light emitting devices (OLEDs) that emit the three primary colors is shown to be a means for achieving efficient and bright full-color displays. In Paper I, we addressed stacked OLED (SOLED) design and fabrication principles to optimize emission colors, operating voltage, and efficiency. Here, we present results on two different (metal-containing and metal-free cathode) SOLED structures that exhibit performance suitable for many full-color display applications. The operating voltages at 10 mA/cm(2) (corresponding to video display brightnesses) are 6.8, 8.5, and 12.1 V for the red (R), green (G), and blue (B) elements of the metal-containing SOLED, respectively. The respective subpixel luminous efficiencies are 0.53, 1.44, and 1.52 cd/A, and the Commission Internationale de L'Eclairage (CIE) chromaticity coordinates are (0.72, 0.28), (0.42, 0.56), and (0.20, 0.22). In the high transparency metal-free SOLED, an insulating layer was inserted between the two upper subpixels to allow for independent grounding of all color emitters in the stack. At operating voltages of 12-14 V, video display brightnesses were achieved with luminous efficiencies of 0.35, 1.36, and 1.05 cd/A for the R, G, and B subpixels, respectively. The respective CIE coordinates for R, G, and B emissions are (0.72, 0.28), (0.26, 0.63), and (0.17, 0.28) in the normal viewing direction, shifting inperceptibly as the viewing angle is increased to as large as 60 degrees. Finally, we discuss addressing schemes of SOLED displays, and compare them with other strategies for achieving full-color, OLED-based displays. (C) 1999 American Institute of Physics. [S0021-8979(99)03220-X].