Organic electroluminescent element and novel iridium complex
An iridium complex which has a phenylpyridine bidentate ligand containing a group represented by the following general formula (A): wherein X represents a cyano group or a halogenated alkyl group; L represents a single bond or a divalent linking group; R represents a substituent; n represents an integer of 0 to 4; * represents a binding site to a phenylpyridine bidentate ligand.
1. An organic electroluminescence device, comprising:
a substrate;
a pair of electrodes including an anode and a cathode, disposed on the substrate; and
at least one organic layer including a light emitting layer, disposed between the electrodes,
wherein at least one kind of compound represented by the following general formula (1) is contained in at least one of the organic layers:
wherein R 111 to R 134 each independently represent a hydrogen atom or a substituent; at least two adjacent groups out of R 111 to R 114 , R 114 and R 115 , at least two adjacent groups out of R 115 to R 118 , at least two adjacent groups out of R 119 to R 122 , R 122 and R 123 , at least two adjacent groups out of R 123 to R 126 , at least two adjacent groups out of R 127 to R 130 , R 130 and R 131 , or at least two adjacent groups out of R 131 to R 134 may be bonded to each other to form a ring, provided that at least one of R 119 to R 134 represents a group represented by the following general formula (A); and that none of R 111 to R 118 represent a group represented by general formula (A);
X represents a cyano group or a trifluoromethyl group; L represents a single bond or a divalent linking group; R represents a substituent; when a plurality of R's are present, they may be the same as or different from each other; n represents an integer of 0 to 4; * represents a binding site.
2. The organic electroluminescent element according to claim 1 , wherein the compound represented by the general formula (1) is a compound represented by the following general formula (2):
general
wherein R 111 to R 123 , R 125 , R 126 , and R 211 to R 215 each independently represent a hydrogen atom or a substituent; two groups out of R 111 to R 118 may be each the same as or different from each other; at least two adjacent groups out of R 111 to R 114 , R 114 and R 115 , at least two adjacent groups out of R 115 to R 118 , at least two adjacent groups out of R 119 to R 122 , R 122 and R 123 , or R 125 and R 126 , may be bonded to each other to form a ring; L represents a single bond or a divalent linking group, provided that at least one of R 211 to R 215 represents a cyano group or a trifluoromethyl group.
3. The organic electroluminescent element according to claim 1 , wherein X in the general formula (A) represents a cyano group.