Journal Article Research Support, Non-U.S. Gov't 1,2,3‐benzothiadiazole 2,1,3‐benzothiadiazole Fluorescent Dyes Luminescent Agents SnO2 Terphenyl Compounds bioprobes blue perovskite LEDs bottom contact charge recombination, charge separation charge transfer, organic long-persistent luminescence, phosphonium salts chiral nanocrystals corrosion-free additives defect passivation double cable polymer energy transfer film formation halide perovskites high luminance high‐dimensional charge transport channel interfacial engineering lasing ligand engineering metal chalcogenides mitochondrion-specific optoelectronics organic solar cells perovskite light-emitting diodes