| 摘要 |
The present invention relates to a novel organometallic compound, and more particularly, to a luminescent organometallic compound in which intermolecular interaction is inhibited by means of introducing a germanium substituent, thereby improving light-emitting characteristics. The present invention also relates to an organic electronic device, specifically, to an organic light-emitting diode using the compound. According to the present invention, a germanium substituent is introduced to the parent organometallic iridium compound, thus inhibiting an intermolecular interaction in the solid state and enabling the compound of the present invention to be effectively used in solution processing. When the compound of the present invention is used as part of a light-emitting layer of an organic light-emitting diode, the light-emitting efficiency of the light-emitting diode may be significantly improved. Therefore, the compound of the present invention may be effectively used as a material for an organic light-emitting diode. |
| 主权项 |
1. An organometallic compound represented by Formula 1 below (in Formula 1 above, at least one among R1 to R4 is a substituent represented by Formula 2 below; if there is no substituent of Formula 2 among R1 to R4, R1 to R4 are independent ones from each other selected from the group consisting of hydrogen, deuterium, halogen, cyano, C1-C18 straight or branched alkyl, C1-C18 straight or branched alkoxy, C6-C18 aryl, C3-C18 cycloalkyl, C4-C18 heteroaryl, and 5 to 6-membered heterocycloalkyl, where, the alkyl or alkoxy is non-substitutable or substituted with halogen; the aryl, cycloalkyl, heteroaryl, or heterocycloalkyl is non-substitutable or substituted with halogen or C1-C18 straight or branched alkyl; and the heteroaryl or heterocycloalkyl comprises at least one atom selected from among N, O, and S in the ring; and, R5 to R8 are independent ones from each other selected from the group consisting of hydrogen, deuterium, halogen, cyano, C1-C18 straight or branched alkyl, C1-C18 straight or branched alkoxy, C6-C18 aryl, C3-C18 cycloalkyl, C4-C18 heteroaryl, and 5 to 6-membered heterocycloalkyl, where, the alkyl or alkoxy is non-substitutable or substituted with halogen; the aryl, cycloalkyl, heteroaryl, or heterocycloalkyl is non-substitutable or substituted with halogen or C1-C18 straight or branched alkyl; and the heteroaryl or heterocycloalkyl comprises at least one atom selected from among N, O, and S in the ring; and,is a bidentate ligand formed with coordinate bond with iridium;
m is 2 or 3), (in Formula 2 above, L1 to L3 are independent ones from each other selected from the group consisting of hydrogen, deuterium, halogen, cyano, C1-C18 straight or branched alkyl, C1-C18 straight or branched alkoxy, C6-C18 aryl, C3-C18 cycloalkyl, C4-C18 heteroaryl, and 5 to 6-membered heterocycloalkyl, where, the alkyl or alkoxy is non-substitutable or substituted with halogen; the aryl, cycloalkyl, heteroaryl, or heterocycloalkyl is non-substitutable or substituted with halogen or C1-C18 straight or branched alkyl; and the heteroaryl or heterocycloalkyl comprises at least one atom selected from among N, O, and S in the ring). |
