Highly-efficient blue neutral mononuclear copper(I) halide complexes containing bi- and mono-dentate phosphine ligands

Copper(I) complexes having thermally activated delayed fluorescence (TADF) features have attracted much attention. Neutral mononuclear copper(I) halide complexes chelated by dpmb and PPh3 with intense blue emission in the solid state at room temperature and have peak emission wavelengths at 464-479 nm with microsecond lifetimes (τ = 3.5-4.9 μs; Φ = 0.23-0.52), The emission of the complexes mainly originates from MLCT, XLCT and intraligand transitions.193