Department of Materials Science and Engineering, Seoul National University , Seoul, 151-744, South Korea.
Research Institute of Advanced Materials (RIAM), Seoul National University , Seoul, 151-744, South Korea.
ACS Appl Mater Interfaces. 2017 Nov 1;9(43):37883-37887. doi: 10.1021/acsami.7b10914. Epub 2017 Oct 18.
The use of exciplex hosts is attractive for high-performance phosphorescent organic light-emitting diodes (PhOLEDs) and thermally activated delayed fluorescence OLEDs, which have high external quantum efficiency, low driving voltage, and low efficiency roll-off. However, exciplex hosts for deep-blue OLEDs have not yet been reported because of the difficulties in identifying suitable molecules. Here, we report a deep-blue-emitting exciplex system with an exciplex energy of 3.0 eV. It is composed of a carbazole-based hole-transporting material (mCP) and a phosphine-oxide-based electron-transporting material (BM-A10). The blue PhOLEDs exhibited maximum external quantum efficiency of 24% with CIE coordinates of (0.15, 0.21) and longer lifetime than the single host devices.
三重态激基复合物主体材料在高效率磷光有机发光二极管（PhOLEDs）和热激活延迟荧光 OLEDs 中具有很大的应用潜力，因为这些器件具有高外量子效率、低驱动电压和低效率滚降等优点。然而，由于难以确定合适的分子，三重态激基复合物主体材料在深蓝光 OLEDs 中的应用还没有得到报道。在这里，我们报道了一种具有 3.0 eV 三重态激基复合物能量的深蓝光发射激基复合物体系。它由咔唑基空穴传输材料（mCP）和磷氧化物基电子传输材料（BM-A10）组成。蓝色磷光 PhOLEDs 的最大外量子效率为 24%，CIE 坐标为（0.15，0.21），寿命长于单一主体器件。
