TY - JOUR
T1 - Effects of additional Ce3+ doping on the luminescence of Li 2 SrSiO4
T2 - Eu2+ yellow phosphor
AU - Kim, Tae Gon
AU - Lee, Hyo Sug
AU - Lin, Chun Che
AU - Kim, Taehyung
AU - Liu, Ru Shi
AU - Chan, Ting Shan
AU - Im, Seoung Jae
N1 - Funding Information:
C.C.L. and R.-S.L. thank financial support from National Science Council (Taiwan) under Contract Nos. 97-3114-M-002-005 and 97-002-012-MY3.
PY - 2010/2/22
Y1 - 2010/2/22
N2 - Additional Ce3+ doping improves the luminescence of Li 2 SrSiO4: Eu2+, a yellow phosphor for ultraviolet or blue light-emitting diodes. By examining the photoluminescence of Li2 SrSiO4: Eu2+, Li2 SrSiO 4: Ce3+, and Li2 SrSiO4: Ce 3+, Eu2+, it was confirmed that the energy transfer from Ce3+ to Eu2+ ions contributes little to the enhanced luminescence of Li2 SrSiO4: Ce3+, Eu 2+. 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.
AB - Additional Ce3+ doping improves the luminescence of Li 2 SrSiO4: Eu2+, a yellow phosphor for ultraviolet or blue light-emitting diodes. By examining the photoluminescence of Li2 SrSiO4: Eu2+, Li2 SrSiO 4: Ce3+, and Li2 SrSiO4: Ce 3+, Eu2+, it was confirmed that the energy transfer from Ce3+ to Eu2+ ions contributes little to the enhanced luminescence of Li2 SrSiO4: Ce3+, Eu 2+. 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.
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U2 - 10.1063/1.3308486
DO - 10.1063/1.3308486
M3 - Article
AN - SCOPUS:76749154169
VL - 96
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 6
M1 - 061904
ER -