| abstract |
The invention belongs to the field of organic optoelectronics, and in particular relates to a host-guest composition comprising an iridium metal complex and an organic compound, and describes an organic electroluminescence element using the composition as an organic functional layer. The structure of the organic compound is shown in formula (I), and the structure of iridium metal complex is shown in formula (II): The difference between the singlet energy level S1 and the triplet energy level T1 of the compound represented by the organic compound formula (I) ΔST≤0.35 electron volts; the iridium metal complex formula (II) and the organic optoelectronic elements comprising them can be referred to herein. Provide specific descriptions for understanding. The host-guest composition of the present invention is applied to the light-emitting layer of the organic electroluminescent diode, so that the current efficiency of the light-emitting element is improved, the driving voltage is obviously reduced, and the service life is prolonged, and has a good commercialization prospect. |