The spectral emission of phosphors varies widely with the composition of the basic compound, even under activation by the same element. In any series of isomorphous compounds, however, the variations can be coordinated. They are found to follow a definite rule that is based on corresponding variations in the field strength to which the activator ion is subjected by the anions of its environment. The field strength is shown to depend on the size of the crystal lattice and on the polarizability of the elements composing the crystal.
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Schulman, Ginther, and Claffy, J. Electrochem. Soc. 96, 57(1949).
See reference 9.
G. R. Fonda, J. Electrochem. Soc. 103, 400 (1956).
See reference 11.
W. L. Wanmaker, J. phys. radium 17, 636 (1956).
Table VI
Effect of substitution on the spectral emission of alkaline earth sulfides and divalent fluorides.
W. von Meyeren, Z. Physik 61, 321 (1930).
Gobrecht, Hahn, and Gretzinger, Z. Physik 139, 309 (1954).
A. L. Smith, J. Electrochem. Soc. 99, 155 (1952).
S. Larach, J. Chem. Phys. 21, 756 (1953).
Tables (7)
Table I
Relation between spectral emission and ion spacing in ABF3 compounds.
Monovalent cation
Mg(0.78)
Zn(0.83)
Cd(1.03)
Ca(1.06)
Metal
Radius
Mn-F
Peak
Mn-F
Peak
Mn-F
Peak
Mn-F
Peak
K
1.35
1.99
6010
2.03–2.13
5910
2.16
5700
2.19
5660
Rb
1.49
2.04
5750
2.05–2.90
5730
2.20–2.26
5620
2.23
5600
Cs
1.65
2.24
5500
2.26
5450
Table II
Effect of cation constituent on fluorescence of vanadates.
Phosphor
Peak emission
Ionic radii of cations
NaVO3
5850 A
0.98 A
KVO3
5510
1.33
RbVO3
5310
1.49
CsVO3
5240
1.65
Table III
Effect of cation constituent on fluorescence of silicates.
Composition
Peak emission
Cation to anion spacing in oxide
Zn2SiO4:Mn
5250, 6000 A
2.00, 3.22 A
CaSiO3:Mn
5600, 6200
2.40
CdSiO3:Mn
6000, 6240
2.35
MgSiO3:Mn
6600, 7400
2.10
Mg2SiO4:Mn
6400, 7400
2.10
Table IV
Effect of substitution on spectral emission of ternary silicates and phosphates.
Schulman, Ginther, and Claffy, J. Electrochem. Soc. 96, 57(1949).
See reference 9.
G. R. Fonda, J. Electrochem. Soc. 103, 400 (1956).
See reference 11.
W. L. Wanmaker, J. phys. radium 17, 636 (1956).
Table VI
Effect of substitution on the spectral emission of alkaline earth sulfides and divalent fluorides.
W. von Meyeren, Z. Physik 61, 321 (1930).
Gobrecht, Hahn, and Gretzinger, Z. Physik 139, 309 (1954).
A. L. Smith, J. Electrochem. Soc. 99, 155 (1952).
S. Larach, J. Chem. Phys. 21, 756 (1953).
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