A crystal defect led zero thermal quenching β-NaYF 4  : Eu 3+ ,Dy 3+ red emitting phosphor.

Red-light phosphors with extraordinary and stable thermal luminous properties must urgently be explored under the circumstances that commercial phosphors are suffering from serious thermal quenching effects and a lack of red-light components. Synthesized by a one-step hydrothermal method, a new type of NaYF 4  : 0.065Eu 3+ ,0.003Dy 3+ phosphor with notable thermal luminous stability is reported in this study. As well as energy transfer between Dy 3+ and Eu 3+ , this novel red-light phosphor manifests zero thermal quenching (ZTQ) performance under an increasing temperature of measurement. The ZTQ property stems from the interior defects of the crystal produced by the non-equivalence replacement between distinct ions. Density Functional Theory (DFT) calculations were utilized to verify the formation energy of two kinds of defects that make a vital contribution to the ZTQ performance of the NaYF 4  : 0.065Eu 3+ ,0.003Dy 3+ phosphor. This finding could make some contributions towards research into improving thermal luminous properties and stability.