| 摘要 |
an anode; a cathode; a light-emitting layer located between the anode and the cathode, said light-emitting layer containing a light-emitting metal complex comprising general formula (1) where M represents Re(I), W(0), Ir(III), or Os(II); L1 represents a tridentate ligand; and L2, L3 and L4 represent ligands, characterised in that L1 comprises general formula (2) where R1 represents a bridging group; and Ar1, Ar2 and Ar3 each independently represents a group comprising a heteroaryl ring and * indicates coordination to M.
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