EXTERNAL DAMPING, MUTUAL INTERACTION OF ACTIVATORS, AND MIGRATION OF HOLES IN THE PHOSPHORS ZnS-Cu AND ZnS,-Cu,Co

Journal Article · Sat Mar 01 04:00:00 EST 1958 · Postepy Fizyki (Poland)

OSTI ID:4141445

Fock, M W

The recombination interaction of the centers of blue and green luminescence and the damping of the phosphors of ZnS-Cu and ZnS-Cu,Co with infrared radiation were the subject of an experimental study. The analysis of the recombination interaction was based on a scheme analogous to that proposed by W. A. Jastrebow in 1941 STASee W. A. Jastrebow, Trudy FIAN. 3, No. 2, 121(1946)!. Phosphors prepared from non-activated ZnS in an HCl atmosphere at a temperature of 1150 deg C were studied. The copper content in the phosphor was 10/sup -7/ g/ g. It showed a strong blue luminescence. At high temperatures the green luminescence grows stronger than the blue, with an increase in intensity of the excitation light. A certain divergence from theoretical computations developed. i.e., computations show that the luminescence intensity of phosphors under the influence of temperature for one of the lines (green or blue) can only be non- linear when it is linear for the other, while the experiment has shown the existence of a region where this dependence is non-linear for both. This fact is probably associated with the appearance of external damping. Studies made of the damping of both luminescence lines excited by lambda = 436 m mu radiation show that the drop of blue luminosity of ZnS-Cu(l0/sup -6/) is almost the same as the green. It was confirmed experimentally that light with wave length lambda = 436 m mu does not excite directly the blue centers. Thus, phosphors containing no copper exhibit a strong blue luminescence (more intense than phosphors containing copper) under the action of ultraviolet ( lambda = 366 m mu ), but radiation of lambda = 436 m mu does not produce this luminescence. Damping of ZnS-Cu,Co by infrared radiation apparently results in the liberation of holes from ionized centers. This external damping proceeds in accordance with a reaction of the second order and there is no reaction of the first order. (JPRS)

• Research Organization: Lebedev Inst. of Physics, Academy of Sciences, USSR
• NSA Number: NSA-14-014211
• OSTI ID: 4141445
• Journal Information: Postepy Fizyki (Poland), Journal Name: Postepy Fizyki (Poland) Vol. Vol: 9; ISSN PSTFA
• Country of Publication: Country unknown/Code not available
• Language: Polish

Related Subjects

ACTIVATION
COBALT
COPPER
ELECTRIC CHARGES
EXCITATION
FREQUENCY
HIGH TEMPERATURE
HYDROCHLORIC ACID
INFRARED RADIATION
INTERACTIONS
IONIZATION
LIGHT
LUMINESCENCE
MEASURED VALUES
MOTION
PHOSPHORS
PHYSICS
REGENERATION
TEMPERATURE
ULTRAVIOLET RADIATION
ZINC SULFIDES