Alkali, Chalcogen, Conductor, Energy gap for direct transition

• Cs-Tb-Te-Zn
• Cs-Hg-Se-Y
• Cd-Cs-Se-Y
• Bi-Cs-S
• Ag-Cs-S-U
• conductor
• alkali
• chalcogen
• semiconductor
• non-disordered
• orthorhombic
• monoclinic
• trigonal
• cubic
• triclinic