A composition including a first compound is disclosed, wherein the first compound is capable of functioning as a phosphorescent emitter in an organic light emitting device at room temperature; wherein the first compound has at least one aromatic ring and at least one substituent R; wherein each of the at least one R is an organic group having at least one X—F bond; wherein each X is independently selected from the group consisting of Si, and Ge; and wherein each of the at least one R is directly bonded to one of the aromatic rings.
本发明公开了一种包括第一种化合物的组合物,其中第一种化合物能够在室温下作为有机发光器件中的
磷光发光体发挥作用;其中第一种化合物具有至少一个芳香环和至少一个取代基R;其中至少一个R中的每一个都是具有至少一个X-F键的有机基团;其中每一个X都独立地选自由Si和Ge组成的组;其中至少一个R中的每一个都直接键合到其中一个芳香环上。