| abstract |
(57) [Summary] (with correction) [PROBLEMS] To provide a light-emitting element material and a light-emitting element capable of emitting light with high luminance and high efficiency, and a novel indole derivative. In a light-emitting element in which a light-emitting layer or an organic compound layer including a light-emitting layer is formed between a pair of electrodes provided on a substrate, a single-layer film of a host material in the organic compound layer is used. A light-emitting element having an energy gap of 6 eV or more and having an ionization potential of the host material of 5.4 to 6.3 eV, and a novel indole derivative and a light-emitting element material represented by the following formula. (Wherein L 12 is a divalent to hexavalent linking group containing a heteroaryl group or a divalent to hexavalent linking group consisting of a non-conjugated linking group containing an arylene group, and n 2 is 2 to 6 Represents an integer. R represents an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a heteroaryl group having 2 to 20 carbon atoms, or a silyl group having 3 to 20 carbon atoms, and m is an integer of 0 to 6. Represent. ) |