TY - JOUR
T1 - Double emitting phosphor NaSr4(BO3) 3:Ce3, Tb3 for near-UV light-emitting diodes
AU - Guo, Chongfeng
AU - Ding, Xu
AU - Jin Seo, Hyo
AU - Ren, Zhaoyu
AU - Bai, Jintao
PY - 2011/10
Y1 - 2011/10
N2 - Blue and green double emitting phosphor, Ce3 and Tb3 co-doped NaSr4(BO3)3, was synthesized in a weak reducing atmosphere by a conventional high temperature solid-state reaction technique. For comparison, Ce3 or Tb3 singly doped NaSr4(BO3)3 was also prepared. The emission and excitation spectra of all samples have been investigated. NaSr 4(BO3)3:Tb3 excitation includes a strong absorption at about 240 nm and some weak sharp lines in near-ultraviolet (n-UV) spectral region. The excitation of Ce3 and Tb3 co-doped NaSr4(BO3)3 shows a strong broad band absorption in the n-UV region from the contribution of Ce3, which makes it suitable for excitation by a n-UV LED chip. The emission of NaSr 4(BO3)3:Ce3,Tb3 consists of a blue emission band from Ce3 and a green emission from Tb 3 under the excitation of n-UV light. Energy transfer between Ce 3 and Tb3 is also discussed, and the relative intensity of blue emission and green emission could be tuned by adjusting the concentration of Ce3 and Tb3. The phosphor NaSr4(BO 3)3:Ce3,Tb3 could be considered as a double emission phosphor for n-UV excited white light-emitting diodes.
AB - Blue and green double emitting phosphor, Ce3 and Tb3 co-doped NaSr4(BO3)3, was synthesized in a weak reducing atmosphere by a conventional high temperature solid-state reaction technique. For comparison, Ce3 or Tb3 singly doped NaSr4(BO3)3 was also prepared. The emission and excitation spectra of all samples have been investigated. NaSr 4(BO3)3:Tb3 excitation includes a strong absorption at about 240 nm and some weak sharp lines in near-ultraviolet (n-UV) spectral region. The excitation of Ce3 and Tb3 co-doped NaSr4(BO3)3 shows a strong broad band absorption in the n-UV region from the contribution of Ce3, which makes it suitable for excitation by a n-UV LED chip. The emission of NaSr 4(BO3)3:Ce3,Tb3 consists of a blue emission band from Ce3 and a green emission from Tb 3 under the excitation of n-UV light. Energy transfer between Ce 3 and Tb3 is also discussed, and the relative intensity of blue emission and green emission could be tuned by adjusting the concentration of Ce3 and Tb3. The phosphor NaSr4(BO 3)3:Ce3,Tb3 could be considered as a double emission phosphor for n-UV excited white light-emitting diodes.
KW - LED
KW - Optical materials
KW - Phosphor
UR - http://www.scopus.com/inward/record.url?scp=79955651517&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2011.04.006
DO - 10.1016/j.optlastec.2011.04.006
M3 - Article
AN - SCOPUS:79955651517
SN - 0030-3992
VL - 43
SP - 1351
EP - 1354
JO - Optics and Laser Technology
JF - Optics and Laser Technology
IS - 7
ER -