ORGANIC ELECTROLUMINESCENT ELEMENT, ELECTRONIC DEVICE, LIGHT EMITTING DEVICE, AND LIGHT EMITTING MATERIAL

摘要

An objective of the present invention is to provide: an organic electroluminescent element which has high efficiency and a long service life; and an electronic device and a light emitting device, each of which is provided with the organic electroluminescent element. Another objective of the present invention is to provide a light emitting material which has high efficiency and a long service life. An organic electroluminescent element according to the present invention comprises at least one organic layer that is interposed between a positive electrode and a negative electrode. This organic electroluminescent element is characterized in that: at least one organic layer contains a fluorescent compound and a host compound; the internal quantum efficiency by electrical excitation of the fluorescent compound is 50% or more; the half-value width of the emission band of an emission peak wavelength in the emission spectrum of the fluorescent compound at a room temperature is 100 nm or less; and the host compound has a structure represented by general formula (I).

主权项

1. An organic electroluminescent element comprising at least one organic layer interposed between an anode and a cathode,
wherein the at least one organic layer contains a fluorescent compound and a host compound; the fluorescent compound has an internal quantum efficiency of 50% or more by electrical excitation; the fluorescent compound has a half bandwidth of 100 nm or less in an emission band of an emission maximum wavelength in an emission spectrum of the fluorescent compound at a room temperature; and the host compound contains a structure represented by Formula (I), in Formula (I), X101 represents NR101, an oxygen atom, a sulfur atom, CR102R103, or SiR102R103; y1 to y8 each represent CR104 or a nitrogen atom; R101 to R104 each represent a hydrogen atom or a substituent, provided that R101 to R104 each may be bonded together to form a ring; Ar101 and to Ar102 each represent an aromatic ring, provided that each may be the same or different with each other; and n101 and n102 each represent an integer of 0 to 4, provided that when R101 represents a hydrogen atom, n101 represents an integer of 1 to 4.