CaSc₂O₄ co-doped with Yb/Er, Yb/Tm was successfully prepared through a high-temperature solid-state method. The enhanced red and near-infrared upconversion luminescence intensities in CaSc₂O₄ co-doped with Yb/Er, Yb/Tm were observed. As the increase of Ca²⁺ ion doping concentration, the crystal phase evolved from cubic Sc₂O₃ to orthorhombic CaSc₂O₄, then to cubic CaO. When Ca²⁺ ion doping concentration is about 40 mol%, CaSc₂O₄ co-doped with Yb/Er has the maximum red emission intensity (666 nm) which is increased by 39.5 times than that of Sc₂O₃ microcrystals (MCs). Similarly, the maximum near-infrared emission intensity (807 nm) in CaSc₂O₄ co-doped with Yb/Tm is enhanced by 9 times than that of Sc₂O₃ MCs when Ca²⁺ ion doping concentration is about 40 mol%. They are in accordance with that Er³⁺ ion and Tm³⁺ ion exhibit the longest luminescence lifetime in CaSc₂O₄ MCs than that in Sc₂O₃ and CaO MCs.

通过高温固态法成功制备了掺有Yb / Er，Yb / Tm的CaSc ₂ O ₄。在掺有Yb / Er，Yb / Tm的CaSc ₂ O ₄中观察到增强的红色和近红外上转换发光强度。随着Ca ²⁺离子掺杂浓度的增加，晶相从立方Sc ₂ O ₃演化为斜方CaSc ₂ O ₄，然后演化为立方CaO。当Ca ²⁺离子掺杂浓度为约40 mol％时，CaSc ₂ O ₄掺Yb / Er的最大红色发射强度（666 nm）比Sc ₂ O ₃微晶（MCs）增加39.5倍。类似地，当Ca ²⁺离子掺杂浓度约为40 mol％时，与Yb / Tm共掺杂的CaSc ₂ O _4中的最大近红外发射强度（807 nm）比Sc ₂ O ₃ MC的最大近红外发射强度提高了9倍。。这是因为，Er ³⁺离子和Tm ³⁺离子在CaSc ₂ O ₄ MC中的发光寿命比在Sc ₂ O ₃和CaO MC中的发光寿命最长。