Motivated from increasing demands of non-contact optical temperature sensing, the Yb³⁺-Er³⁺ and Eu³⁺ doped NaY₉Si₆O₂₆ (NYS) oxide phosphors were designed by high-temperature solid-state reaction method. The phase purity of the as-prepared samples was checked from XRD patterns. For the upconversion luminescence in NYS:Yb³⁺,Er³⁺, the optimal Er³⁺ doping content was determined to be 1 mol%, and the characteristic emission peaks of Er³⁺ were observed in the region of 500–700 nm. In Eu³⁺ activated NYS phosphors, it has been found that the emissions originating in ⁵D₁ and ⁵D₀ levels demonstrate different change tendencies in intensity with Eu³⁺ doping concentration. By studying the temperature-dependent luminescent spectra, it was indicated that the emissions intensities from different excited states of Er³⁺ change differently with temperature. Two kinds of fluorescence intensity ratio (FIR) strategies were used in NYS:10%Yb³⁺,1%Er³⁺, containing thermally-coupled levels and non-thermally-coupled levels. In the NYS:3%Eu³⁺ phosphor, it was found that the FIR for 577 and 536 nm emissions follows a linear relation with temperature. The high sensitivities in the present phosphors indicate the potential application in optical temperature sensing.

出于对非接触式光学温度传感的日益增长的需求，通过高温固态反应方法设计了Yb ³⁺ -Er ³⁺和Eu ³⁺掺杂的NaY ₉ Si ₆ O ₂₆（NYS）氧化物荧光粉。从XRD图检查所制备样品的相纯度。对于NYS：Yb ³⁺，Er ^3+中的上转换发光，确定最佳Er ³⁺掺杂含量为1 mol％，并且在500-700 nm区域观察到Er ³⁺的特征发射峰。在Eu ³⁺活化的NYS磷光体，已发现源自⁵ D ₁和⁵ D ₀的发射具有随Eu ³⁺掺杂浓度而变化的强度变化趋势。通过研究随温度变化的发光光谱，表明Er ³⁺不同激发态的发射强度随温度变化。NYS中使用了两种荧光强度比（FIR）策略：10％Yb ³⁺，1％Er ³⁺，包括热耦合能级和非热耦合能级。在纽约州：3％Eu ³⁺磷光体，发现577和536 nm发射的FIR随温度呈线性关系。本发明的磷光体中的高灵敏度表明在光学温度感测中的潜在应用。