Light-emitting device
View Patent ↗An organic electroluminescent device having a pair of electrodes and at least one organic layer including a light-emitting layer interposed between the pair of electrodes, in which the organic layer contains at least one platinum complex compound having a quadridentate ligand containing a partial structure represented by formula (I): wherein Z 1 represents a nitrogen-containing heterocycle coordinated to the platinum through a nitrogen atom; L 1 represents a single bond or a linking group; R 1 , R 3 and R 4 each independently represent a hydrogen atom or a substituent; and R 2 represents a substituent.
1. An organic electroluminescent device having a pair of electrodes and at least one organic layer including a light-emitting layer interposed between the pair of electrodes,
wherein the organic layer contains at least one platinum complex compound represented by formula (III):
wherein Q 2 represents a group bonded to the platinum through a carbon atom, an oxygen atom, a sulfur atom, a nitrogen atom or a phosphorous atom; L 1 , L 2 and L 3 each independently represent a single bond or a linking group; R 1 , R 3 and R 4 each independently represent a hydrogen atom or a substituent; R 2 represents a substituent; R a and R b each independently represent a substituent; n and m each independently represent an integer of from 0 to 3; and R 1 to R 4 do not connect with Q 2 .
2. The organic electroluminescent device according to claim 1 , wherein the platinum complex compound represented by formula (III) is a platinum complex compound represented by formula (IV):
wherein Q 4 represents an aromatic hydrocarbon group or an aromatic heterocyclic group, each bonded to the platinum through a carbon atom or a nitrogen atom; L 1 , L 2 and L 3 each independently represent a single bond or a linking group; R 1 , R 3 and R 4 each independently represent a hydrogen atom or a substituent; R 2 represents a substituent; R a and R b each independently represent a substituent; and n and m each independently represent an integer of from 0 to 3.
3. The organic electroluminescent device according to claim 1 , wherein the platinum complex compound represented by formula (III) is a compound represented by formula (V):
wherein L 1 , L 2 and L 3 each independently represent a single bond or a linking group; R 1 , R 3 , R 4 , R 5 , R 7 and R 8 each independently represent a hydrogen atom or a substituent; R 2 and R 6 each independently represent a substituent; R a and R b each independently represent a substituent; and n and m each independently represent an integer of from 0 to 3.
4. The organic electroluminescent device according to claim 1 , wherein at least one of the platinum complex compound represented by formula (III) is contained in the light-emitting layer.
5. The organic electroluminescent device according to claim 1 , wherein at least one of the platinum complex compound represented by formula (III) and at least one host material are contained in the light-emitting layer.