CAJ | 학술논문

采用溶胶-凝胶法分别制备MAl2 O4：Eu3+( M=Ca, Sr, Ba)系列红色荧光粉,并对所制备的样品进行了XRD、SEM以及荧光光谱等表征,结果表明：CaAl2 O4：Eu3+红色荧光粉的适宜焙烧温度为900℃,其粒径大小约1~2μm,当激活剂Eu3+的摩尔浓度增加到4%时,其发光强度达到最大；SrAl2 O4：Eu3+红色荧光粉的适宜焙烧温度为1100℃,其粒径大小约3~4μm,当激活剂Eu3+的摩尔浓度增加到4%时,其发光强度达到最大；BaAl2 O4：Eu3+红色荧光粉的适宜焙烧温度为1100℃,其粒径大小约4~5μm,当激活剂Eu3+的摩尔浓度增加到2%时,其发光强度达到最大。以392 nm 的近紫外光激发样品,MAl2 O4：Eu3+( M=Ca, Sr, Ba)荧光粉发出明亮的红光,这对应于Eu3+的4f-4f跃迁。 MAl2 O4：Eu3+在392 nm的吸收与目前应用的紫外光发光二极管( LED)芯片相匹配,因此,MAl2 O4：Eu3+( M=Ca, Sr, Ba)荧光粉在作为白光LED用红色荧光粉方面具有潜在的应用前景。
채용용효-응효법분별제비MAl2 O4：Eu3+( M=Ca, Sr, Ba)계렬홍색형광분,병대소제비적양품진행료XRD、SEM이급형광광보등표정,결과표명：CaAl2 O4：Eu3+홍색형광분적괄의배소온도위900℃,기립경대소약1~2μm,당격활제Eu3+적마이농도증가도4%시,기발광강도체도최대；SrAl2 O4：Eu3+홍색형광분적괄의배소온도위1100℃,기립경대소약3~4μm,당격활제Eu3+적마이농도증가도4%시,기발광강도체도최대；BaAl2 O4：Eu3+홍색형광분적괄의배소온도위1100℃,기립경대소약4~5μm,당격활제Eu3+적마이농도증가도2%시,기발광강도체도최대。이392 nm 적근자외광격발양품,MAl2 O4：Eu3+( M=Ca, Sr, Ba)형광분발출명량적홍광,저대응우Eu3+적4f-4f약천。 MAl2 O4：Eu3+재392 nm적흡수여목전응용적자외광발광이겁관( LED)심편상필배,인차,MAl2 O4：Eu3+( M=Ca, Sr, Ba)형광분재작위백광LED용홍색형광분방면구유잠재적응용전경。
MAl2O4:Eu3+(M=Ca, Sr, Ba) red phosphors were synthesized by sol-gel method re-spectively.The optimum calcinations temperature for CaAl2 O4:Eu3+ phosphor is 900 ℃, the size of the particles are about 1 ~2 μm, and the luminous intensity reaches the maximum when the mol concentration of activator Eu3+ions increased to 4%;the optimum calcinations temperature for SrAl2 O4:Eu3+ red phosphor is 1 100 ℃, the size of the particles are about 3~4 μm, and the luminous intensity reaches the maximum when the mol concentration of activator Eu3+ ions increased to 4%;the optimum calcinations temperature for BaAl2 O4:Eu3+ Red Phosphor is 1 100 ℃, the size of the particles are about 4 ~5 μm, and the luminous intensity reaches the maximum when the mol concentration of activator Eu3+ ions increased to 2%.Upon excitation with 392 nm light, all the MAl2O4:Eu3+(M=Ca, Sr, Ba) powders show bright red emission due to the 4f-4f transitions of Eu3+ ions.The excitation and emission spectra showed that the phosphor can be effectively excited by ultraviolet light(392 nm) , nicely fitting in with the widely applied emission wavelengths of ultravio-let light-emitter diodes (LED) chips.The MAl2O4:Eu3+(M=Ca, Sr, Ba) phosphors may be good candidate phosphor for LED application.