Highly Efficient, Simplified Monochrome and White Organic Light‐Emitting Devices based on Novel Exciplex Host,Advanced Optical Materials

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Highly Efficient, Simplified Monochrome and White Organic Light‐Emitting Devices based on Novel Exciplex Host
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2019-11-22 , DOI: 10.1002/adom.201901247
Ren Sheng ₁ , Asu Li ₁ , Fujun Zhang ₁ , Jian Song ₁ , Yu Duan ₁ , Ping Chen ₁

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The exciplex co‐host system is one of the most promising candidates for developing phosphorescent organic light‐emitting diodes (OLEDs) with high performance. However, highly effective exciplex co‐host system that is able to realize color‐pure monochrome OLED and superior color‐stable white OLED simultaneously is rarely reported so far. Herein, a novel exciplex co‐host system formed by the donor of (N,N′‐dicarbazolyl‐3,5‐benzene) (MCP) and the acceptor of 4,6‐bis[3,5‐(dipyrid‐3‐yl)‐phenyl]‐2‐phenylpyrimidine (B4PyPPM) is constructed successfully to achieve efficient phosphorescent OLEDs. By employing simple device structure with only two organic transport materials, the blue, green, orange, and red phosphorescent OLEDs based on the universal exciplex co‐host exhibit stable color purity as well as maximum external quantum efficiencies of 20.1%, 26.3%, 24.6%, 19.8%, respectively. By combining blue and orange emitters, white OLED with a high efficiency of 73.6 lm W⁻¹ is demonstrated with an extremely minor Commission Internationale de L, Eclairage coordinates variation of (0.008, 0.002) over a large luminance range, which is attributed to the balanced charge transport property and multiple funneling energy transfer paths.

中文翻译：

基于新型Exciplex主机的高效，简化的单色和白色有机发光器件

准分子复合主系统是开发高性能磷光有机发光二极管（OLED）的最有前途的候选系统之一。但是，迄今为止，很少有能同时实现纯色单色OLED和出色的颜色稳定的白色OLED的高效激基复合物共宿主系统。在此，由（N，N成功地构建了'-二咔唑基-3,5-苯）（MCP）和4,6-双[3,5-（（二吡啶-3-基）-苯基] -2-苯基嘧啶（B4PyPPM）的受体磷光OLED。通过仅使用两种有机传输材料的简单器件结构，基于通用激基复合物共基质的蓝色，绿色，橙色和红色磷光OLED表现出稳定的色纯度以及最大外部量子效率20.1％，26.3％，24.6 ％，19.8％。通过组合蓝色和橙色发射器，可实现73.6 lm W ^-1的高效率的白色OLED 用极小的国际委员会进行了证明，Eclairage在较大的亮度范围内将坐标（0.008，0.002）进行了变化，这归因于平衡的电荷传输特性和多个漏斗能量传递路径。

更新日期：2020-01-17

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