CAJ | 학술논문

使用共沉淀法制备不同掺杂浓度的CeO2∶Eu3＋的荧光粉，并利用XRD ，激发和发射光谱对其光学性质进行了研究。PL激发光谱中出现300～400 nm的源于基质CeO2的强吸收宽带以及较弱的Eu3＋的7 F0‐5 D2（467 nm）吸收峰。由于Ce4＋和Eu3＋半径十分接近，因而Eu3＋在CeO2中具有较高的固溶度。当高浓度Eu3＋掺杂CeO2时，出现了7 F0‐5 D2（467 nm ）吸收峰的极大增强。在467 nm激发下获得了Eu3＋的5 D0—7 F1（592 nm ）和5 D0—7 F2（612 nm ）跃迁的特征红光发射。与电荷迁移带激发下获得的红光相比，在467 nm蓝光激发下获得的红光强度是其5倍。7 F0—5 D2（467 nm ）的强电子吸收与蓝光L ED芯片的输出波长相匹配，在蓝光激发下获得明亮的红光发射。因此，Eu3＋掺杂CeO2荧光粉是一种有潜力的用于白光LED的红色荧光粉。
사용공침정법제비불동참잡농도적CeO2∶Eu3＋적형광분，병이용XRD ，격발화발사광보대기광학성질진행료연구。PL격발광보중출현300～400 nm적원우기질CeO2적강흡수관대이급교약적Eu3＋적7 F0‐5 D2（467 nm）흡수봉。유우Ce4＋화Eu3＋반경십분접근，인이Eu3＋재CeO2중구유교고적고용도。당고농도Eu3＋참잡CeO2시，출현료7 F0‐5 D2（467 nm ）흡수봉적겁대증강。재467 nm격발하획득료Eu3＋적5 D0—7 F1（592 nm ）화5 D0—7 F2（612 nm ）약천적특정홍광발사。여전하천이대격발하획득적홍광상비，재467 nm람광격발하획득적홍광강도시기5배。7 F0—5 D2（467 nm ）적강전자흡수여람광L ED심편적수출파장상필배，재람광격발하획득명량적홍광발사。인차，Eu3＋참잡CeO2형광분시일충유잠력적용우백광LED적홍색형광분。
Under different Eu3+ concentration ,Eu3+ doped CeO2 was prepared by co‐precipitation method ,and the structure and luminescent properties were studied through XRD ,excitation and emission spectra .The PLE spectrum shows a broad charge‐transfer band from 300~400 nm ,and a week excitation line at 467 arise from 7 F0 — 5 D2 transition in Eu3+ .The red emission arise from 5 D0 — 7 F1 (592 nm)and 5 D0 — 7 F2 transitions of Eu3+ has a great increase by high concentration doping under 467 nm excitation .The wavelength at 467 nm is nicely fitting in with the widely applied emission wavelengths of blue LED chips .It is indicated that the CeO2 ∶ Eu3+ phosphor emits efficiently red emission under the blue light which makes it possible to create white light from a combination of a blue LED chip .