The composition including the platinum-containing organometallic compound, the first compound, the second compound, and the third compound may be suitable as a material for forming an organic layer, for example, an emission layer included in the organic layer, of an organic light-emitting device. Another aspect of the present disclosure provides an organic light-emitting device including: a first electrode; a second electrode; and an organic layer located between the first electrode and the second electrode and including an emission layer and the composition.
The composition may be used between a pair of electrodes of the organic light-emitting device. For example, the emission layer may include the composition. Here, the platinum-containing organometallic compound may serve as a dopant, and the first compound, the second compound, and the third compound may each act as a host.
The organic light-emitting device including the composition may emit red light, green light, or blue light. For example, the organic light-emitting device including the composition may emit green light, but embodiments of the present disclosure are not limited thereto.
The first electrode may be an anode, which is a hole injection electrode, and the second electrode may be a cathode, which is an electron injection electrode; or the first electrode may be a cathode, which is an electron injection electrode, and the second electrode may be an anode, which is a hole injection electrode.