人工晶体学报2025，Vol.54Issue(8)：1470-1477,8.DOI:10.16553/j.cnki.issn1000-985x.2025.0029
Mn4+掺杂四方相CaLaGaO4远红光发射荧光粉的制备及其发光性能
Synthesis and Luminescent Properties of Mn4+-Doped Tetragonal-Phase CaLaGaO4 Far-Red Emitting Phosphors
摘要
Abstract
The development of novel far-red emitting Mn4+doped oxide phosphors has emerged as a prominent research focus for phosphor-converted light-emitting diodes(pc-LEDs)in plant growth applications.In this study,tetragonal-phase CaLaGaO4∶Mn4+phosphors were successfully synthesized through a high-temperature solid-state reaction method,involving sequential thermal treatments at 600℃for 3 h followed by sintering at 1 350℃for 5 h in air atmosphere.The CaLaGaO4∶0.4%Mn4+phosphors can be excited by light at 250～600 nm.Under 366 nm UV excitation,the characteristic broadband emission centered at 705 nm is primarily attributed to the 2E→4A2 transition of Mn4+.Optimal luminescent performance is achieved at a Mn4+doping concentration of 0.4%,with concentration quenching mechanisms governed by electric dipole-dipole interactions.The temperature-dependent emission spectra(298～498 K)reveal a thermal activation energy of 0.418 eV for the CaLaGaO4∶0.4%Mn4+phosphors.Notably,the emission spectrum exhibits substantial spectral overlap with plant photoreceptor absorption bands,demonstrating overlap degrees of 23.8%and 51.2%with phytochrome PR and PFR,respectively.These results demonstrate that CaLaGaO4∶Mn4+phosphors can be used as far-red emitting pc-LEDs for plant growth lighting.关键词
发光材料/红光发射荧光粉/Mn4+/CaLaGaO4/高温固相法/pc-LEDsKey words
luminescent material/red-emitting phosphor/Mn4+/CaLaGaO4/high-temperature solid-state method/pc-LEDs分类
数理科学引用本文复制引用
马忠亮,段帅毅,赵玲玲,鹿桂花,李玉强,刘玉学,杨健..Mn4+掺杂四方相CaLaGaO4远红光发射荧光粉的制备及其发光性能[J].人工晶体学报,2025,54(8):1470-1477,8.基金项目
新疆维吾尔自治区自然科学基金面上项目(2024D01C201) （2024D01C201）
新疆凝聚态相变与微结构实验室开放课题(XJDX0912Z2402) （XJDX0912Z2402）
伊犁师范大学校级科研项目(2023YSZD005) （2023YSZD005）
大学生创新创业训练项目(202410764013,S202410764025) （202410764013,S202410764025）
