摘要
介绍一个大学化学研究型综合实验——K2GeF6:Mn荧光粉的化学共沉淀合成、结构测定与发光性能研究。本实验结合氧化还原与化学共沉淀法制备K2GeF6:Mn荧光粉,借助XRD和SEM对粉体进行结构表征,并利用荧光光谱仪测试分析其发光性能,探究激活剂含量和反应温度对粉体结构与性能的影响,获得可应用于商业白光LED的红色荧光粉。通过该实验的设计与实施,使学生在掌握基本实验技能的同时,能够结合基础理论知识解释实验原理、分析实验现象,并进一步提升学生的科学研究思维和综合运用知识的能力。
A research-based comprehensive experiment was introduced:co-precipitation synthesis,structure characterization and photoluminescent properties of K2GeF6:Mn phosphors.Chemical redox and co-precipitation method was employed to synthesize K2GeF6:Mn phosphors.By using XRD,SEM and PL spectra characterization techniques,the effects of Mn contents and reactive temperatures on the structure and properties of K2GeF6:Mn phosphors were studied.The red phosphors show great potential in LEDs applications.Through this experiment,students can master the basic laboratory skills;interpret the experimental principles with their basic theoretical knowledge,which will further enhance their scientific research ability and comprehensive application of knowledge.
作者
魏灵灵
焦桓
Lingling Wei;Huan Jiao(School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119,P.R.China)
出处
《大学化学》
CAS
2020年第4期112-118,共7页
University Chemistry
基金
陕西师范大学教育教学改革研究项目(GERP-19-42)。
关键词
研究型综合实验
化学共沉淀法
氟化物红色荧光粉
荧光光谱
Research-based comprehensive experiment
Co-precipitation synthesis
Hexafluoride phosphors
Photoluminescence
