Light emitting element and light emitting device

摘要

One object of the present invention is to provide a light emitting element that includes an organic compound and an inorganic compound and has low driving voltage. The light emitting element of the invention includes a plurality of layers between a pair of electrodes, wherein the plurality of layers includes a layer that contains a carbazole derivative represented by a general formula (1) and an inorganic compound exhibiting an electron accepting property with respect to the carbazole derivative. By utilizing this structure, electrons are transported between the carbazole derivative and the inorganic compound and carriers are internally generated, and hence, the driving voltage of the light emitting element can be reduced.;

主权项

1. A light emitting element comprising:
a layer between a pair of electrodes, wherein the layer contains a carbazole derivative represented by a formula (1) and an inorganic compound exhibiting an electron accepting property with respect to the carbazole derivative: wherein R1 represents any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, an unsubstituted aryl group, a heteroaryl group having 5 to 9 carbon atoms, an arylalkyl group and an acyl group having 1 to 7 carbon atoms, wherein R2 is represented by a formula (2): wherein Ar1 to Ar6 independently represent either an aryl group having 6 to 25 carbon atoms or a heteroaryl group having 5 to 9 carbon atoms, wherein X and Y independently represent either a bivalent aromatic hydrocarbon group having 6 to 25 carbon atoms or a bivalent heterocyclic ring group having 5 to 10 carbon atoms, wherein Ar1, Ar2, Ar3 and X are the same as Ar4, Ar5, Ar6, and Y, respectively, and wherein the unsubstituted aryl group is selected from a phenyl group, a 4-biphenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-phenanthryl group, a 1-pyrenyl group, and a spiro-9,9′-bifluorene-2-yl group.