LaScO₃:xBi³⁺,yTb³⁺,zEu³⁺ (x = 0 − 0.04, y = 0 − 0.05, z = 0 − 0.05) phosphors were prepared via high‐temperature solid‐state reaction. Phase identification and crystal structures of the LaScO₃:xBi³⁺,yTb³⁺,zEu³⁺ phosphors were investigated by X‐ray diffraction (XRD). Crystal structure of phosphors was analyzed by Rietveld refinement and transmission electron microscopy (TEM). The luminescent performance of these trichromatic phosphors is investigated by diffuse reflection spectra and photoluminescence. The phenomenon of energy transfer from Bi³⁺ and Tb³⁺ to Eu³⁺ in LaScO₃:xBi³⁺,yTb³⁺,zEu³⁺ phosphors was investigated. By changing the ratio of x, y, and z, trichromatic can be obtained in the LaScO₃ host, including red, green, and blue emission with peak centered at 613, 544, and 428 nm, respectively. Therefore, two kinds of white light‐emitting phosphors were obtained, LaScO₃:0.02Bi³⁺,0.05Tb³⁺,zEu³⁺ and LaScO₃:0.02Bi³⁺,0.03Eu³⁺,yTb³⁺. The energy transfer was characterized by decay times of the LaScO₃:xBi³⁺, yTb³⁺, zEu³⁺ phosphors. Moreover absolute internal QY and CIE chromatic coordinates are shown. The potential optical thermometry application of LaScO₃:Bi³⁺,Eu³⁺ was based on the temperature sensitivity of the fluorescence intensity ratio (FIR). The maximum S_a and S_r are 0.118 K⁻¹ (at 473.15 K) and 0.795% K⁻¹ (at 448.15 K), respectively. Hence, the LaScO₃:Bi³⁺,Eu³⁺ phosphor is a good material for optical temperature sensing.

中文翻译：

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LaScO3中的可调颜色发射：Bi3 +，Tb3 +，Eu3 +荧光粉

LASCO ₃：X的Bi ³⁺，ÿ铽³⁺，ž的Eu ³⁺（X  = 0 - 0.04，ÿ  = 0 - 0.05，ž  = 0 - 0.05）通过高温固相反应来制备荧光体。LaScO _3的相识别和晶体结构：x Bi ³⁺，y Tb ³⁺，z Eu ³⁺通过X射线衍射（XRD）研究了荧光粉。通过Rietveld精炼和透射电子显微镜（TEM）分析了磷光体的晶体结构。通过漫反射光谱和光致发光研究了这些三色磷光体的发光性能。研究了LaScO _3中Bi ³⁺和Tb ³⁺到Eu ³⁺的能量转移现象：x Bi ³⁺，y Tb ³⁺，z Eu ³⁺荧光粉。通过更改x，y和z的比率，可以在LaScO _3中获得三色包括红色，绿色和蓝色发射，峰值分别位于613、544和428 nm处。因此，获得了两种发射白光的荧光粉，分别为LaScO ₃：0.02Bi ³⁺，0.05Tb ³⁺，z Eu ³⁺和LaScO ₃：0.02Bi ³⁺，0.03Eu ³⁺，y Tb ³⁺。LaScO ₃的衰变时间表征了能量转移：x Bi ³⁺，y Tb ³⁺，z Eu ³⁺荧光粉。此外，还显示了绝对内部QY和CIE色度坐标。LaScO ₃：Bi ³⁺，Eu ³⁺的潜在光学测温应用是基于荧光强度比（FIR）的温度敏感性。最大S _a和S _r分别为0.118 K ^-1（在473.15 K）和0.795％K ^-1（在448.15 K）。因此，LaScO ₃：Bi ³⁺，Eu ³⁺荧光粉是用于光学温度感测的良好材料。