Patent ID: 7306856

Claim:
A light-emitting element comprising a pair of electrodes and a light-emitting layer, or a plurality of organic compound layers containing a light-emitting layer between the pair of electrodes, wherein the light-emitting layer, or the plurality of organic compound layers containing a light-emitting layer, comprises at least one kind of compound having a partial structure represented by the following general formula K-III: wherein R 31 and R 33 to R 36 each independently represents hydrogen or a substituent; R 32 represents hydrogen; and two or more of R 33 to R 36 may be combined with one another to form a cyclic structure; wherein the light-emitting element has a light emission maximum wavelength of 420-480 nm; wherein the at least one kind of compound having the partial structure represented by general formula K-III is of the following general formula K-IV: wherein R 41 and R 43 to R 46 each independently represents hydrogen or a substituent; R 42 represents hydrogen; L 41 represents a ligand; n 41 represents an integer of 1 to 3; and n 42 represents an integer of 0 to 4; wherein the light-emitting layer comprises at least one host material having a unit which is selected from the group consisting of a pyridine unit, a pyrazine unit, a triazine unit, and an arylsilane unit.