| MgAl2O4∶Er3+，Yb3+荧光粉的制备及其上转换发光性能 |
| Preparation and Upconversion Luminescence Properties of MgAl2O4: Er3+, Yb3+ Phosphors |
| 作者 | 单位 | E-mail | | 卢杨 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028
营口理工学院, 材料科学与工程系, 营口 115014 | | | 王晶 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | wangjing@djtu.edu.cn | | 史忠祥 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | | | 戴丽静 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | | | 张洪铭 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | | | 孙子婷 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | | | 刘永富 | 大连交通大学, 辽宁省无机超细粉体制备及应用重点实验室, 大连 116028 | |
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| 摘要: 以尿素为沉淀剂，采用低温水热法结合煅烧过程制备出MgAl2O4：Er3+，Yb3+上转换荧光粉，并对样品的结构、微观形貌及上转换发光性能予以表征。结果表明，随尿素加入量的增大，产物主形貌由六角片状结构向纳米棒状转变，经1 100℃煅烧可得纯相镁铝尖晶石结构，且Er3+和Yb3+能有效进入MgAl2O4晶格并占据Mg2+位置形成均匀固溶体。在980 nm光激发下，MgAl2O4：1.0%（n/n）Er3+，x%（n/n）Yb3+（x=0~8.0）荧光粉表现出在524、545 nm处绿光以及658 nm处的强红光发射，红绿光强度均在5.0%（n/n）Yb3+掺杂时达到最大，但红绿光强度比却在7.0%（n/n）Yb3+掺杂时达到最大值5.2，这归因于Er3+-Er3+之间交叉弛豫（CR）在红光发射过程中所起的重要作用。通过控制荧光粉中Yb3+的掺杂量，能初步实现对于黄绿光色度的有效调控。 |
| 关键词: MgAl2O4∶Er3+，Yb3+ 低温水热法 上转换 交叉弛豫 |
| 基金项目: 国家重点研发计划项目（No.2017YFB0310300）和辽宁省自然科学基金项目（No.2019-DZ-0090）资助。 |
| Abstract: MgAl2O4:Er3+, Yb3+ upconversion phosphors was prepared by low-temperature hydrothermal method combined with calcination process and using urea as precipitant. The crystal structure, morphology and upconversion luminescence properties of the samples were investigated. The results show that the main morphology of the product changed from hexagonal flake structure to nanorod-like structure with the increase of urea content. Pure phase of Mg-Al spinel structure can be obtained after calcinating at 1 100℃. Er3+ and Yb3+ can enter into MgAl2O4 lattice effectively and occupy Mg2+ sites to form homogeneous solid solution. MgAl2O4:1.0%(n/n)Er3+, x%(n/n)Yb3+ (x=0~8.0) phosphors show green (524 and 545 nm) and strong red (658 nm) light emission under 980 nm laser diode excitation, the red and green light intensity reached the maximum at 5.0%(n/n)Yb3+ doping, but the intensity ratio of red light vs green light reached the maximum value of 5.2 at 7.0%(n/n)Yb3+ doping, which is attributed to the major role of cross relaxation (CR) between Er3+ and Er3+ in red light emission process. The color-tunable of yellow-green light can be realized basically by adjusting the doping content of Yb3+ in the phosphor. |
| Keywords: MgAl2O4:Er3+, Yb3+ low-temperature hydrothermal method upconversion cross relaxation |
| 投稿时间：2019-10-22 修订日期：2020-01-17 |
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| 卢杨,王晶,史忠祥,戴丽静,张洪铭,孙子婷,刘永富.MgAl2O4∶Er3+，Yb3+荧光粉的制备及其上转换发光性能[J].无机化学学报,2020,36(4):688-694. |
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