Аннотация:Hybrid halocuprates (I) with organic cations show great potential for optoelectronic applications due to their tunable luminescence and high thermal stability. In this study, the iodocuprate (I) [PPh4][Cu3I4], featuring unique helical chains of face-sharing tetrahedra, was synthesized and characterized. This compound exhibits a bandgap of 3.1 eV and orange luminescence at low temperature, attributed to self-trapped exciton emission. [PPh4][Cu3I4] demonstrates exceptional thermal stability among hybrid halocuprates with decomposition above 380 °C, forming a stable melt at ~255 °C without Cu+ oxidation in ambient atmosphere.
