摘要
红色荧光粉是提高发光二极管(LED)显色指数、降低色温的重要组分。本文选择具有红色特征发射的Eu^(3+)作为激活剂离子,以新型磷酸盐Sr_(2)InP_(3)O_(11)为荧光粉基质,通过高温固相反应合成了系列Sr_(2-x)InP_(3)O_(11):xEu^(3+)(简化为S_(2-x)IP_(3):xEu^(3+))和Sr_(2)In_(1-x)P_(3)O_(11):xEu^(3+)(简化为S_(2)I_(1-x)P_(3):xEu^(3+))荧光粉。利用XRD、室温及变温PL光谱、量子效率和荧光寿命,详细研究了所制备荧光粉的光致发光性能及其受阳离子位点(Sr位和In位)的影响规律。研究结果表明,这两类荧光粉在254nm和393nm激发下均可发出明亮的橘红光(593nm和612nm主导)。此外,所合成的荧光粉具有较好的色稳定性和热稳定性,表明其在荧光粉转换型白光LED照明和显示领域具有一定的发展潜力。
Red phosphor is an important component to improve the color rendering index and reduce the color tem-perature of white light emitting diode(LED).In this paper,we select Eu^(3+)with characteristic red emission as activator ions,and new phosphate Sr_(2)InP_(3)O_(11)is used as the phosphor host.A series of Sr_(2)-xInP_(3)O_(11):xEu^(3+)(simplified as S_(2)-xIP_(3):xEu^(3+))and Sr_(2)In_(1-x)P_(3)O_(11):xEu^(3+)(simplified as S_(2)I_(1-x)P_(3):x Eu^(3+))phosphors were synthesized through high temperature solid state reaction.The photoluminescence performance and the effect rule of cation sites(Sr sites and In sites)of phosphor were detailly studied by XRD,room and variable temperature PL spectra,quantum efficiency and fluorescence lifetime.The results show that these two types of phosphors can emit bright red light(dominating by 593 nm and 612 nm)under the radiation of 254 nm and 393 nm.In addition,these synthesized phosphors have average color stability and thermal stability,which indicates that they have certain development potential in the field of phosphor conversion white LED lighting and displaying.
作者
梁力
赵淑娟
李贵花
刘一佳
王荣荣
蔡格梅
LIANG Li;ZHAO Shujuan;LI Guihua;LIU Yijia;WANG Rongrong;CAI Gemei(School of Materials Science and Engineering,Central South University,Changsha 410083,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第6期913-922,共10页
Chinese Journal of Luminescence
基金
国家自然科学基金(51472273,51772330)。
