CAJ | 학술논문

采用共沉淀法合成了红色荧光粉Ca0.75MoO4∶Eu0.253+、Ca0.75MoO4∶Eu0.25-x3+,Bix3+及Ca0.5MoO4∶Eu0.25-2x3+,Bix3+,Li0.25+x+并采用X射线衍射(XRD)、拉曼光谱,扫描电镜(SEM)和荧光光谱(PL)测定分析了其结构形貌特征及发光性能.结果表明:制备的CaMoO4∶Eu3+,Bi3+,Li+红色荧光粉为白钨矿结构,颗粒尺寸约为0.5～1μm.掺杂Bi3+的Ca0.75MoO4∶Eu0.25-x3+,Bix3+的相对发光强度明显高于未掺Bi3+的Ca0.75MoO4∶Eu0.253+荧光粉.Bi3+离子的掺杂将吸收来的能量传递给激活离子Eu3+,起到了能量传递的作用.当Bi3+掺杂量为x=0.005时,在395 nm激发下,主发射峰在616 nm处的相对发光强度最大,但掺杂浓度过高时会出现浓度猝灭现象.另外,电荷补偿剂的掺入能够解决材料中因同晶取代引起的电荷不平衡的问题,以Li+作电荷补偿剂、Eu3+和Bi3+共掺合成的Ca0.5MoO4∶Eu0.233+,Bi0.013+,Li0.26+红色荧光粉的发光性能强于Ca0.75MoO4∶Eu0.253+、Ca0.5MoO4∶Eu0.253+,Li0.25+及Ca0.75MoO4∶Eu0.243+,Bi0.013+.
채용공침정법합성료홍색형광분Ca0.75MoO4∶Eu0.253+、Ca0.75MoO4∶Eu0.25-x3+,Bix3+급Ca0.5MoO4∶Eu0.25-2x3+,Bix3+,Li0.25+x+병채용X사선연사(XRD)、랍만광보,소묘전경(SEM)화형광광보(PL)측정분석료기결구형모특정급발광성능.결과표명:제비적CaMoO4∶Eu3+,Bi3+,Li+홍색형광분위백오광결구,과립척촌약위0.5～1μm.참잡Bi3+적Ca0.75MoO4∶Eu0.25-x3+,Bix3+적상대발광강도명현고우미참Bi3+적Ca0.75MoO4∶Eu0.253+형광분.Bi3+리자적참잡장흡수래적능량전체급격활리자Eu3+,기도료능량전체적작용.당Bi3+참잡량위x=0.005시,재395 nm격발하,주발사봉재616 nm처적상대발광강도최대,단참잡농도과고시회출현농도졸멸현상.령외,전하보상제적참입능구해결재료중인동정취대인기적전하불평형적문제,이Li+작전하보상제、Eu3+화Bi3+공참합성적Ca0.5MoO4∶Eu0.233+,Bi0.013+,Li0.26+홍색형광분적발광성능강우Ca0.75MoO4∶Eu0.253+、Ca0.5MoO4∶Eu0.253+,Li0.25+급Ca0.75MoO4∶Eu0.243+,Bi0.013+.