Realization of the transition from an indirect band gap to a direct band gap through halogen regulation in the Cs-Ag-X system

Key Points

• This research aims to investigate the transition from an indirect to a direct band gap in specific optical crystals through halogen modification.
• Synthesis of new optical crystals CsAgClI and Cs2AgBr2I
• Halogen regulation techniques applied during crystal formation
• Characterization of band gap properties
• Successful transition achieved from indirect to direct band gap in both crystals
• Demonstrated improved optical properties suitable for scintillation applications