Spectral variations of Ca_3Sc_2Si_3O_(12):Ce phosphors via substitution and energy transfer  

作　　者：刘元红 庄卫东 刘荣辉 胡运生 何华强 张书生 高慰 

机构地区：[1]Grirem Advanced Materials Co.Ltd.,and National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals

出　　处：《Journal of Rare Earths》2012年第4期339-341,共3页稀土学报（英文版）

基　　金：Project supported by the Ministry of Science and Technology of China (2010AA03A404)

摘　　要：The huninescence intensity of emission peak at around 525 nm decreased in the Ce3＋ and Er3＋ co-doped Ca3Sc2Si3012 phosphors. Mg2＋ ion, which was likely incorporated into the Sc3＋ position of the host crystal, was co-doped to adjust the crystal field and compensate for the excess positive charge due to the doping of Ce3＋, The green emission belonged to the 5d→4f transition of Ce3＋ moved toward longer wavelength by addition of Mg2＋ in Ce3＋ and Er3＋ co-doped Ca3Sc2Si3012 phosphor, which could increase the brightness of the phosphor. However, the position of weakening of luminescence intensity at around 525 nm remained basically unchanged by increasing the amount of Mg2＋. The results showed that the weakening of luminescence intensity at around 525 nm caused by the absorption of E3＋, which had little influence on the environment of the crystal field.The huninescence intensity of emission peak at around 525 nm decreased in the Ce3＋ and Er3＋ co-doped Ca3Sc2Si3012 phosphors. Mg2＋ ion, which was likely incorporated into the Sc3＋ position of the host crystal, was co-doped to adjust the crystal field and compensate for the excess positive charge due to the doping of Ce3＋, The green emission belonged to the 5d→4f transition of Ce3＋ moved toward longer wavelength by addition of Mg2＋ in Ce3＋ and Er3＋ co-doped Ca3Sc2Si3012 phosphor, which could increase the brightness of the phosphor. However, the position of weakening of luminescence intensity at around 525 nm remained basically unchanged by increasing the amount of Mg2＋. The results showed that the weakening of luminescence intensity at around 525 nm caused by the absorption of E3＋, which had little influence on the environment of the crystal field.

关 键 词：LUMINESCENCE white LED CO-DOPED spectral variation rare earths 

分 类 号：O614.3[理学—无机化学]