biostudies-literatureUnknown12(47)Ling SRed-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 NaYF₄ : 0.065Eu³⁺,0.003Dy³⁺ phosphor with notable thermal luminous stability is reported in this study. As well as energy transfer between Dy³⁺ and Eu³⁺, 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 (RSC advances30803-30816https://www.ebi.ac.uk/biostudies/studies/S-EPMC9610441biostudies-literatureA crystal defect led zero thermal quenching β-NaYF₄ : Eu³⁺,Dy³⁺ red emitting phosphor.PMC9610441Ling SHuang YMeng KLiao SChen CYan YMing JfalseA crystal defect led zero thermal quenching β-NaYF₄ : Eu³⁺,Dy³⁺ 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 NaYF₄ : 0.065Eu³⁺,0.003Dy³⁺ phosphor with notable thermal luminous stability is reported in this study. As well as energy transfer between Dy³⁺ and Eu³⁺, 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 (2022-01-01T00:00:00Z2022 Oct2025-04-22T21:11:51.771Z2025-04-06T03:30:04.456ZS-EPMC96104413634916310.1039/d2ra05674g