Composite material, light-emitting element, light-emitting device, electronic device, and lighting device

摘要

A composite material including an organic compound and an inorganic compound and having a high carrier-transport property is provided. A composite material having a high carrier-injection property to an organic compound is provided. A composite material in which light absorption due to charge transfer interaction is unlikely to occur is provided. A light-emitting element having high emission efficiency is provided by including the composite material. A light-emitting element having a low drive voltage is provided. A light-emitting element having a long lifetime is provided. A composite material including a heterocyclic compound having a dibenzothiophene skeleton or a dibenzofuran skeleton and an inorganic compound exhibiting an electron-accepting property with respect to the heterocyclic compound is provided.

主权项

1. A light-emitting element comprising:
a pair of electrodes; a light-emitting layer between the pair of electrodes; and a layer including a composite material between the light-emitting layer and one of the pair of electrodes, wherein the composite material comprising: a heterocyclic compound represented by a general formula (G1):and
a transition metal oxide, wherein the transition metal oxide is molybdenum oxide, wherein A represents sulfur, wherein R1 to R7 separately represent one of hydrogen, an alkyl group comprising 1 to 4 carbon atoms, and an aryl group comprising 6 to 25 carbon atoms in a ring, wherein R8, R9, R11 and R12 represent hydrogen, and wherein R10 represents a substituted or unsubstituted fluorenyl group.