In:
The Journal of Chemical Physics, AIP Publishing, Vol. 21, No. 1 ( 1953-01-01), p. 5-11
Abstract:
A study was made of the effects of gallium impurity on the luminescence emission and trapping in phosphors with oxygen-dominated host crystals and in phosphors with zinc sulfide host crystal. Gallium acts (1) as an intensifier for host-crystal emissions in zinc silicate, magnesium silicate, and zinc sulfide phosphors; (2) as an originative activator in zinc germanate phosphor; (3) as a poison for emissions resulting from manganese activator in silicate and germanate phosphors, and for emissions caused by copper and manganese in zinc sulfide phosphors for cathode-ray excitation; (4) as a sensitizer for emissions resulting from copper and manganese in zinc sulfide phosphors for ultraviolet excitation; (5) as a trapping agent in zinc silicate, magnesium silicate, zinc germanate, and zinc sulfide; (6) as a trapping poison in beryllium silicate phosphors. Evidence is found for a correlation between types of emission centers and trapping centers in silicate and germanate phosphors. Results on intensification indicate that intensifier activators are effective in increasing the intensity of host-crystal emissions by introducing crystal defects of the same type as those formed by random thermal processes in the preparation of the phosphor.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
1953
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
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