Pnictogen chalcohalides (MChX, M = Bi, Sb; Ch = S, Se; X = I, Br) have garnered significant attention as promising solar-cell absorber materials due to their nontoxicity, low synthesis temperatures (below 300 °C), (1,2) optimal bandgaps ranging from 1.0 to 2.0 eV, (3,4) and exceptional thermodynamic stability. (5,6) Their electron affinities and ionization potentials also align well with established charge transport layers.