摘要
研究了以β-Si_3N_4为原料制备Eu^(2+)掺杂的CaSi_2O_2N_2∶Eu^(2+)荧光粉,并分析了这类荧光粉的结构特点,通过实验发现该荧光粉有很宽的激发带,可以被紫外和近可见光激发,发射出550~568nm波长的峰。Eu^(2+)与CaSi_2O_2N_2∶Eu^(2+)荧光粉的发光强度有着重要的联系。随着Eu^(2+)浓度的增加激发峰和发射峰都有一定的红移现象,当浓度超过2%时,该荧光粉的发光强度会有所下降,即出现一定的浓度猝灭现象。
The experiment studied the CaSi2O2N2∶Eu^2＋doped Eu^2＋ions phosphors.The experiment found that the excitation with the fluorescent powder was very wide,and it can be stimulated by ultraviolet and near visible,emitting 550-568nm wavelength.Eu^2＋concentration and CaSi2O2N2∶Eu^2＋luminous intensity had important links.With the increase of Eu^2＋concentration,excitation peak and emission peak had a certain redshift phenomenon.When Eu^2＋ concentration more than 2%,the luminous intensity of phosphors will decline,namely appeared certain concentration quenching phenomenon.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第6期175-177,共3页
New Chemical Materials
基金
江门市产学研结合科技计划"应用于LED芯片的贵金属功能材料开发"资助项目(20140100122499)
江门市科技创新平台建设"新材料公共检测与技术服务平台建设"项目资助(20130040163478)
关键词
掺杂
红移
浓度猝灭
doping
red shift phenomenon
concentration quenching
