Efficient Exciplex-Based Deep-Blue Organic Light-Emitting Diodes Employing a Bis(4-fluorophenyl)amine-Substituted Heptazine Acceptor
作者:Jie Li、Heqi Gong、Jincheng Zhang、Hui Liu、Li Tao、Yanqing Wang、Qiang Guo
DOI:10.3390/molecules26185568
日期:——
8 wt% HAP-3FDPA:mCP exhibited deep-blue emission and a high photoluminescence quantum yield of 53.2%. More importantly, an OLED containing this exciplex system as an emitting layer showed deep-blue emission with Commission Internationale de l’Eclairage coordinates of (0.16, 0.12), a peak luminance of 15,148 cd m−2, and a rather high maximum external quantum efficiency of 10.2% along with a low roll-off
在有机发光二极管(OLED)领域,实现深蓝色发射激基复合物系统是一项艰巨的任务,因为与相应的单一化合物相比,激基复合物发射光谱有较大的红移和展宽。在此,2,5,8-三(二(4-氟苯基)胺)-1,3,4,6,7,9,9b-七氮杂菲那烯(HAP-3FDPA)被设计为电子受体,通过集成三个双( 4-氟苯基)胺基团进入庚嗪核心,而具有两个给电子咔唑部分的1,3-二( 9H-咔唑-9-基)苯(mCP)被选为电子供体。令人兴奋的是,8 wt % HAP-3FDPA:mCP 的激基复合物系统表现出深蓝色发射和 53.2% 的高光致发光量子产率。更重要的是,含有该激基复合物体系作为发光层的OLED显示出深蓝色发射,国际照明委员会坐标为(0.16,0.12),峰值亮度为15,148 cd m -2 ,并且具有相当高的最大外量子效率为 10.2%,且滚降较低。这项研究不仅报道了一种高效的基于激基复合物的深蓝色