TY - JOUR
T1 - Luminescence of Eu3+ and Sm3+ Doped Potassium Tungstate Phosphor
AU - Lee, Gwan Hyoung
AU - Kim, Tae Hyung
AU - Kang, Shinhoo
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2005
Y1 - 2005
N2 - The luminescent properties of Eu3+ and Sm3+ doped potassium tungstate phosphor are investigated. The K4–3x (WO4)2 : Eu3+x, Sm3+y phosphor is produced by firing the mixed precursors, followed by re-firing with a flux. The re-firing process results in the defect-free surface and uniform growth of the particles. The strong absorption in the region of ultra violet light is observed due to the 4f-4f electron transitions of the Eu3+ and Sm3+ ions. The doping concentration of europium into potassium tungstate is relatively high, compared to other host materials. It is revealed that the crystal structure is a monoclinic with space group, C2/c. This crystal structure facilitated the Eu3+ ions to be located with the Eu-Eu distance larger than 5 Å so that concentration quenching does not occur even at high doping concentration. The excitation spectrum could be adjusted by the introduction of the samarium. A small amount of the Sm3+ ions that acts as a sensitizer increases the energy absorption peak around 405 nm.
AB - The luminescent properties of Eu3+ and Sm3+ doped potassium tungstate phosphor are investigated. The K4–3x (WO4)2 : Eu3+x, Sm3+y phosphor is produced by firing the mixed precursors, followed by re-firing with a flux. The re-firing process results in the defect-free surface and uniform growth of the particles. The strong absorption in the region of ultra violet light is observed due to the 4f-4f electron transitions of the Eu3+ and Sm3+ ions. The doping concentration of europium into potassium tungstate is relatively high, compared to other host materials. It is revealed that the crystal structure is a monoclinic with space group, C2/c. This crystal structure facilitated the Eu3+ ions to be located with the Eu-Eu distance larger than 5 Å so that concentration quenching does not occur even at high doping concentration. The excitation spectrum could be adjusted by the introduction of the samarium. A small amount of the Sm3+ ions that acts as a sensitizer increases the energy absorption peak around 405 nm.
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U2 - 10.1080/15980316.2005.9651975
DO - 10.1080/15980316.2005.9651975
M3 - Article
AN - SCOPUS:85024004230
VL - 6
SP - 25
EP - 29
JO - Journal of Information Display
JF - Journal of Information Display
SN - 1598-0316
IS - 2
ER -