Herein,a novel scheme is employed to develop ultra-sensitive luminescent thermometers and highbright luminescent inks for screen printing.We synthesize CaLa_(4)Si_(3)O_(13)(CLSO):Dy^(3+) by a traditional hightemperatu...Herein,a novel scheme is employed to develop ultra-sensitive luminescent thermometers and highbright luminescent inks for screen printing.We synthesize CaLa_(4)Si_(3)O_(13)(CLSO):Dy^(3+) by a traditional hightemperature solid-phase method and accurately predict its radiation properties using Judd–Ofelt(J–O)theory.On this basis,Eu^(3+) or Tb^(3+) ions with different radii are introduced into CLSO:Dy^(3+)to modify the crystal structure rigidity.The activation energies of CLSO:Dy^(3+),Dy^(3+)/Eu^(3+),and Dy^(3+)/Tb^(3+) samples are calculated to be 0.256 eV,0.315 eV and 0.289 eV,respectively,which demonstrate that Eu^(3+)or Tb^(3+)enhances the structural stiffness,and thus,improves the thermal stability of materials.Simultaneously,the Debye temperature and thermal expansion coefficients as valuable parameters for structural stiffness also confirm the above-mentioned results.Furthermore,we propose a strategy in which the multiplication of LIRs based on multiple emission peaks with opposite thermal quenching properties follow a Boltzmanntype distribution,resulting in a dramatically increased relative sensitivity of CLSO:Dy^(3+),Dy^(3+)/Eu^(3+),and Dy^(3+)/Tb^(3+) thermometers to 2.92%K−1,3.32%K−1 and 3.19%K−1,respectively.This work not only provides valuable insights into the development of superior temperature sensitive materials but also develops optical anti-counterfeiting technology based on screen printing.展开更多
基金supported by the National Natural Science Foundation of China(12204401).
文摘Herein,a novel scheme is employed to develop ultra-sensitive luminescent thermometers and highbright luminescent inks for screen printing.We synthesize CaLa_(4)Si_(3)O_(13)(CLSO):Dy^(3+) by a traditional hightemperature solid-phase method and accurately predict its radiation properties using Judd–Ofelt(J–O)theory.On this basis,Eu^(3+) or Tb^(3+) ions with different radii are introduced into CLSO:Dy^(3+)to modify the crystal structure rigidity.The activation energies of CLSO:Dy^(3+),Dy^(3+)/Eu^(3+),and Dy^(3+)/Tb^(3+) samples are calculated to be 0.256 eV,0.315 eV and 0.289 eV,respectively,which demonstrate that Eu^(3+)or Tb^(3+)enhances the structural stiffness,and thus,improves the thermal stability of materials.Simultaneously,the Debye temperature and thermal expansion coefficients as valuable parameters for structural stiffness also confirm the above-mentioned results.Furthermore,we propose a strategy in which the multiplication of LIRs based on multiple emission peaks with opposite thermal quenching properties follow a Boltzmanntype distribution,resulting in a dramatically increased relative sensitivity of CLSO:Dy^(3+),Dy^(3+)/Eu^(3+),and Dy^(3+)/Tb^(3+) thermometers to 2.92%K−1,3.32%K−1 and 3.19%K−1,respectively.This work not only provides valuable insights into the development of superior temperature sensitive materials but also develops optical anti-counterfeiting technology based on screen printing.
