Materials. Next, the remaining six groups of three-component doped materials were prepared using the other seven guests, the host and the seven metal salts mentioned above. Compared with 2-QL/BPO and 8-QL/BPO, the phosphorescence properties of three-component doped materials 2-QL/BPO/M and 8-QL/BPO/M have no obvious change (Supplementary Figure ). This may be due to the close spatial distance of the benzene ring at the 2-or 8-position from the nitrogen atom, which hinders the coupling of the metal ions to the nitrogen atom. For the doped materials 3-QL/BPO/M, the main function of CF3COOAg and CdI2 is still to increase the phosphorescence intensity, compared with 3-QL/BPO, the phosphorescence intensity is enhanced by a factor of