Characterization of structural and optical properties of Mn²⁺ -doped Zn₂ GeO₄ nanorods as an efficient green phosphor for solid-state lighting

A series of Mn²⁺ -doped zinc germinate ZGO:xMn²⁺ (x = 0-0.05) nanorods was synthesized successfully using a hydrothermal method. XRD revealed that crystal phases of the ZGO:xMn²⁺ were rhombohedral and in the R-3 space group. The Williamson-Hall equation was also used to explain the strain, nanocrystalline size, and stacking fault. Green LEDs were successfully fabricated by coating ZGO:Mn²⁺ nanorods onto UV-LED chips. For high color purity, CIE of the fabricated green LEDs were (0.2404, 0.5428), which made this material a promising candidate for fabrication of UV-based green LEDs.