Photoluminescence of Mn²⁺‐Doped ZnGa₂ O ₄ Single‐Crystal Fibers

Manganese‐doped zinc gallate is a new promising cathode ray phosphor material with low excitation voltage. On excitation of the host, we observed strong emission from both the self‐activated (SA) host material and tetrahedrally coordinated Mn²⁺ ions in single‐crystal fibers. The efficient host‐Mn²⁺ energy transfer makes this material an attractive candidate for display technology. The experimental results show that the SA center is not an intermediate involved in the host‐Mn²⁺ energy‐transfer process.