| K3ZrF7:Mn4+红色荧光粉的溶剂热合成及发光性质 |
| Solvothermal Synthesis and Luminescence Property of K3ZrF7: Mn4+ Red Phosphors |
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| 摘要: 用溶剂热法制备了K3ZrF7，并利用离子交换法对其进行Mn4+掺杂，获得了发光强度较高的红色荧光粉。分别用X射线衍射仪（XRD）和扫描电子显微镜（SEM）对材料的结构和形貌进行了表征。考察了掺杂浓度（物质的量分数）对材料发光强度的影响。通过对比2种锰掺杂材料的发光行为，发现在掺杂浓度相同的条件下，K3ZrF7：Mn4+的发光强度是K2ZrF6：Mn4+的10倍多。通过对二者晶体结构和掺杂离子配位环境进行分析，从晶体场理论的角度解释了发光强度差异机制。 |
| 关键词: 红色荧光粉 锰掺杂 溶剂热法 |
| 基金项目: 河南省教育厅自然科学基金（No.153PKJGG139）、河南省高等学校重点科研项目（No.20A150042）和郑州市科技计划重点项目（No.153PKJGG139）资助。 |
| Abstract: K3ZrF7 was prepared by solvothermal method, and Mn4+ was doped by ion-exchange method to obtain high intensity red phosphors. The structures and morphologies of the materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that pure K3ZrF7 can be obtained efficiently with oleylamine as solvent under anhydrous condition. When oleylamine is replaced with water, pure K2ZrF6 can be prepared successfully. The effect of doping concentration(molar fraction) of Mn4+ on PL intensity of the materials was also investigated. By comparing the luminescence behavior of two Mn4+ doped materials, it was found that the PL intensity of K3ZrF7:Mn4+ was more than 10 times higher than that of K2ZrF6:Mn4+ with the same doping concentration. The mechanism of luminescence intensity difference can be explained by crystal field theory. It is known that the crystal structure and coordination environment of doped ion are very important to PL intensity of materials. We consider that the higher PL intensity of K3ZrF7:Mn4+ may be relative to its larger asymmetry of local crystal field. |
| Keywords: red phosphor manganese doped solvothermal method |
| 投稿时间：2019-12-21 修订日期：2020-04-08 |
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| 赵春梅,宁德鹏,李雪艳,冀银豪,温婷.K3ZrF7:Mn4+红色荧光粉的溶剂热合成及发光性质[J].无机化学学报,2020,36(9):1620-1624. |
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