Effects of additional Ce3+ doping on the luminescence of Li2SrSiO4:Eu2+ yellow phosphor

被引：76

作者：

Kim, Tae-Gon ^{[1
]}

Lee, Hyo-Sug ^{[1
]}

Lin, Chun Che ^{[2
]}

Kim, Taehyung ^{[1
]}

Liu, Ru-Shi ^{[2
]}

Chan, Ting-Shan ^{[3
]}

Im, Seoung-Jae ^{[1
]}

机构：

[1] Samsung Adv Inst Technol, Mat Res Ctr, Yongin 446712, South Korea

[2] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 06期

关键词：

cerium; doping; europium; light emitting diodes; lithium compounds; phosphors; photoluminescence; strontium compounds; X-ray absorption; INORGANIC-COMPOUNDS; EU2+; PHOTOLUMINESCENCE;

D O I：

10.1063/1.3308486

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Additional Ce3+ doping improves the luminescence of Li2SrSiO4:Eu2+, a yellow phosphor for ultraviolet or blue light-emitting diodes. By examining the photoluminescence of Li2SrSiO4:Eu2+, Li2SrSiO4:Ce3+, and Li2SrSiO4:Ce3+,Eu2+, it was confirmed that the energy transfer from Ce3+ to Eu2+ ions contributes little to the enhanced luminescence of Li2SrSiO4:Ce3+,Eu2+. Alternatively, we suggested that Ce3+ ions could stabilize the Li vacancies, inhibit the oxidization of Eu2+ to Eu3+, and consequently increase emission intensity, based on the characterizations with decay time and synchrotron light source x-ray absorption measurements. The proposed argument was validated with first principle calculations of the defect formation energies.

引用

页数：3

共 13 条

[1] SPECIFIC INTERMEDIATE-VALENCE STATE OF INSULATING 4F COMPOUNDS DETECTED BY L3 X-RAY ABSORPTION [J].