Researchers from the University of Cambridge, Cambridge, UK, have published a study titled “Intrinsic intermolecular photoinduced charge separation in organic radical semiconductors.” The research explored tris(2,4,6-trichlorophenyl)methyl (TTM) radicals, known for efficient photoluminescence from spin-doublet excitons, to investigate their charge photogeneration potential. It was found that when TTMs were in contact, photoexcitation generated TTM anion–cation pairs that either decayed radiatively or separated under an electric field. Using triphenyl-substituted TTM (P3TTM), the researchers observed photoluminescence at 645 nm and a delayed signal at 800 nm caused by recombination. Diode structures made entirely of P3TTM showed near-unity charge collection efficiency in reverse bias. The results demonstrated intermolecular homojunction charge separation driven by favorable energy conditions, offering potential for single-material molecular semiconductor applications.