TY - JOUR
T1 - X-ray and photoluminescence study of Li6Gd(BO3)3:Tb3+, Dy3+ Phosphors
AU - Fawad, U.
AU - Kim, H. J.
AU - Khan, A.
AU - Park, H.
AU - Kim, Sunghwan
N1 - Publisher Copyright:
© 2015 by American Scientific Publisher.
PY - 2015
Y1 - 2015
N2 - This work is particularly dedicated to the synthesis of Li6Gd(BO3)3: Tb3+, Dy3+ (lithium gadolinium borate) phosphors by the well-known solid state reaction method and their X-ray and photoluminescence investigations. The optimal activator's concentrations (0.2 mol% for Tb3+ and 0.3 mol% for Dy3+) were determined and used for further analysis. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for analyzing the phases, crystallinities, grain sizes and the overall morphologies of the synthesized phosphors. The X-ray and UV-VIS induced luminescence were measured. The UV induced emission spectrum of Li6Gd(BO3)3: Tb3+ phosphor showed five major peaks corresponding to the characteristic Tb3+ transitions (5Dj →7Fj), whereas, Li6Gd(BO3)3: Dy3+ phosphor exhibited four major emission peaks that correspond to transitions from the ground state of f9(6H15/2) to some higher energy states of 4f9. The quantitative analyses of luminescence of the synthesized phosphors are vital for their applications in various fields. Hence, the X-ray induced light yields were measured for Li6Gd(BO3)3: Tb3+, Dy3+ phosphors to be 113% and 78% of that of gadox (gadolinium oxy sulfide, Gd2O2S: Tb3+), respectively. Hence these phosphors could be good candidates for X-ray imaging. According to Blasse's and Dexter's calculations, the dipole-dipole interaction is responsible for concentration quenching mechanism on concentrations of both phosphors. The chromaticity coordinates were measured for Li6Gd(BO3)3: Tb3+, Dy3+.
AB - This work is particularly dedicated to the synthesis of Li6Gd(BO3)3: Tb3+, Dy3+ (lithium gadolinium borate) phosphors by the well-known solid state reaction method and their X-ray and photoluminescence investigations. The optimal activator's concentrations (0.2 mol% for Tb3+ and 0.3 mol% for Dy3+) were determined and used for further analysis. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for analyzing the phases, crystallinities, grain sizes and the overall morphologies of the synthesized phosphors. The X-ray and UV-VIS induced luminescence were measured. The UV induced emission spectrum of Li6Gd(BO3)3: Tb3+ phosphor showed five major peaks corresponding to the characteristic Tb3+ transitions (5Dj →7Fj), whereas, Li6Gd(BO3)3: Dy3+ phosphor exhibited four major emission peaks that correspond to transitions from the ground state of f9(6H15/2) to some higher energy states of 4f9. The quantitative analyses of luminescence of the synthesized phosphors are vital for their applications in various fields. Hence, the X-ray induced light yields were measured for Li6Gd(BO3)3: Tb3+, Dy3+ phosphors to be 113% and 78% of that of gadox (gadolinium oxy sulfide, Gd2O2S: Tb3+), respectively. Hence these phosphors could be good candidates for X-ray imaging. According to Blasse's and Dexter's calculations, the dipole-dipole interaction is responsible for concentration quenching mechanism on concentrations of both phosphors. The chromaticity coordinates were measured for Li6Gd(BO3)3: Tb3+, Dy3+.
KW - Luminescence
KW - Optical materials and Properties
KW - Phosphors
KW - Sintering
KW - Spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84957543125&partnerID=8YFLogxK
U2 - 10.1166/sam.2015.2436
DO - 10.1166/sam.2015.2436
M3 - Article
AN - SCOPUS:84957543125
SN - 1947-2935
VL - 7
SP - 2536
EP - 2544
JO - Science of Advanced Materials
JF - Science of Advanced Materials
IS - 12
ER -