Ba5Zn4Gd8O21:Tb3+-structural characterization and the Judd-Ofelt parameterization from emission spectra

被引：18

作者：

Dalal, Jyoti ^{[1
]}

Dalal, Mandeep ^{[1
]}

Devi, Sushma ^{[1
]}

Chahar, Sangeeta ^{[1
]}

Hooda, Anju ^{[1
]}

Khatkar, Avni ^{[2
]}

Malik, R. K. ^{[1
]}

Taxak, V. B. ^{[1
]}

Khatkar, S. P. ^{[1
]}

机构：

[1] Maharshi Dayanand Univ, Dept Chem, Rohtak 124001, India

[2] Maharshi Dayanand Univ, Dept Elect & Commun UIET, Rohtak 124001, India

来源：

METHODS AND APPLICATIONS IN FLUORESCENCE | 2020年 / 8卷 / 03期

关键词：

Judd-Ofelt parameters; optical properties; x-ray diffraction; crystal structure; nanophosphor; laser materials; CRYSTAL-STRUCTURE; ENERGY-TRANSFER; DEPENDENT LUMINESCENCE; COLOR; EU3+; PHOSPHOR; PHOTOLUMINESCENCE; INTENSITIES; STABILITY; TB3+;

D O I：

10.1088/2050-6120/ab33b6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Ba5Zn4Gd8O21:Tb3+ nanorods; synthesized via solution combustion route; were found to crystallize in the tetragonal (I4/m, 87) crystal system. The UV excitation at 290 nm of all Ba5Zn4Gd8O21:Tb3+ samples yielded the characteristics emission corresponding to D-5(4) -> F-7(6,5,4,3) transitions in Tb3+ activator (used for Judd-Ofelt analysis). A detailed investigation of photoluminescence decay curves and emission spectra of Ba5Zn4Gd8O21:Tb3+ nanorods provided the radiative lifetime (1.0889 ms) and total radiative transition rates from D-5(4) state in Tb3+ ion. The electric-dipole radiative transition probabilities (extracted from total radiative rates i.e. electric-dipole + magnetic-dipole) were used to calculate the Judd-Ofelt intensity parameters (omega(2) = 4.76 x 10(-20), omega(4) = 2.11 x 10(-20) and omega(6) = 2.00 x 10(-20) cm(2)). The very high quantum efficiency of D-5(4) state (81%) suggests their potential use in lighting and display devices. Finally, a large magnitude of peak stimulated emission cross section of D-5(4) -> F-7(5) (16.5838 x 10(-20) cm(2)) transition also claims their promising candidature as a good laser material.

引用

页数：14

共 44 条

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