One-dimensional π–π stacking induces highly efficient pure organic room-temperature phosphorescence and ternary-emission single-molecule white light

High-efficiency RTP of TX-Cl crystal was induced by one-dimensional π–π stacking, which significantly enhances both intersystem crossing (S₁ → T_n) and radiative rate (T₁ → S₀). SMWLE was harvested by precisely controlling aggregating degree.