Nitridated Ca₂NaMg₂V₃O₁₂: Eu³⁺ Vanadate Garnet Phosphor-in-Glass

• Main Authors: Damian Pasinski, Jerzy Sokolnicki
• Format: Article
• Language: English
• Published: MDPI AG 2020-07-01
• Series: Materials
• Subjects: vanadate garnet; europium; nitridation; phosphor-in-glass
• Online Access: https://www.mdpi.com/1996-1944/13/13/2996
• ISSN: 1996-1944

In this study, Ca₂NaMg₂V₃O₁₂ coordination compound undoped and doped with Eu³⁺ obtained in the air and ammonia atmosphere by solid-state reaction was investigated. Ca₂NaMg₂V₃O₁₂: Eu³⁺ obtained in the ammonia atmosphere was then investigated as a phosphor-in-glass (PiG). Annealed Ca₂NaMg₂V₃O₁₂: Eu³⁺ phosphor forms a single phase with the cubic garnet structure and <i>Ia3d</i> space group. Nitridation in ammonia causes a widening of a VO₄³⁻ group emission band on the low energy side and it red-shifts by 20 nm. The emission of Eu³⁺ is extended as compared to the non-nitridated phosphor. Ca₂NaMg₂V₃O₁₂: Eu³⁺ after nitridation shows higher emission quantum yield (QY): 49 vs. 45 and lower correlated color temperature (CCT) and 4179 vs. 4998 as compared to phosphor without nitridation. The QY for PiG is 55. The thermal stability of nitridated phosphors is superior to phosphor obtained in the air atmosphere and is further enhanced for PiG.