A device approach to manage the emission color of the organic light-emitting diodes (OLEDs) which show two emission processes of thermally activated delayed fluorescence (TADF) and phosphorescence was developed by engineering the host of the emitter. The emitting material was phenyl(10-phenyl-10H-phenoselenazin-3-yl)methanone (PSeBz) which emitted at 496 nm by TADF process and at 559 nm by phosphorescence process. The phosphorescence of the PSeBz emitter was selectively switched by the host because the triplet excitons can be intentionally quenched by the low triplet energy host. Therefore, the color coordinate of the OLEDs could be tuned from (0.35, 0.52) to (0.41, 0.52) by just changing the host of the PSeBz emitter.

通过设计发射体的主体，开发了一种用于管理有机发光二极管（OLED）的发射颜色的器件方法，该方法显示了热激活延迟荧光（TADF）和磷光的两种发射过程。发光材料是苯基（10-苯基-10H-苯并硒氮杂-3-基）甲酮（PSeBz），其通过TADF工艺在496nm处发射，并且通过磷光工艺在559nm处发射。PSeBz发射体的磷光被主体选择性地切换，因为三重态激子可以被低三重态能量主体有意地淬灭。因此，仅改变PSeBz发射器的主体，就可以将OLED的色坐标从（0.35，0.52）调整为（0.41，0.52）。