Solution-processable mixed-anion cluster chalcohalide Rb 6 Re 6 S 8 I 8 in a light-emitting diode

Rhenium chalcohalide cluster compounds are a photoluminescent family of mixed-anion chalcohalide cluster materials. Here we report the new material Rb 6 Re 6 S 8 I 8 , which crystallizes in the cubic space group Fm 3̅ m and contains isolated [Re 6 S 8 I 6 ] 4− clusters. Rb 6 Re 6 S 8 I 8 has a band gap of 2.06(5) eV and an ionization energy of 5.51(3) eV, and exhibits broad photoluminescence (PL) ranging from 1.01 eV to 2.12 eV. The room-temperature PL exhibits a PL quantum yield of 42.7