POSITIVE HOLE MOTION AND PHOTOVOLTAIC EFFECTS IN ZINC CADMIUM SULFIDE PHOSPHORS

Journal Article · Fri Sep 01 04:00:00 EDT 1961 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.123.1661· OSTI ID:4839839

Kallmann, H; Kramer, B; Spagnolo, F; Spruch, G M

Information was gained about the free carriers in activated and unactivated ZnCdS phosphors through a study of the photovoltaic effect in these materials. The photovoltages produced in activated ZnCdS phosphors by illumination with various wavelengths parallel the absorption spectra of these materials and do not depend strongly upon the type of activation. The photovoltages are brought about by a diffusion of electrons from the excited region into the interior of the sample. The addition of lead as a coactivator reduces the voltage because it increases the recombination rate. In unactivated ZnS the size of the photovoltage again parallels the absorption spectrum but its sign is reversed, indicating that positive charges are the more mobile carriers. Unactivated CdS exhibits voltages similar to the activated materials. Insulating one electrode affects the size of the photovoltage appreciably only for the unactivated materials, showing that charge exchange at the electrode is important for them and not for the activated materials. (auth)

• Research Organization: New York Univ.
• NSA Number: NSA-15-031403
• OSTI ID: 4839839
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 123; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
CADMIUM SULFIDES
DEFECTS
DIFFUSION
ELECTRIC CHARGES
ELECTRODES
ELECTRONS
ENERGY RANGE
EXCITATION
LEAD
MOTION
PHOSPHORS
PHOTOELECTRIC EFFECT
PHYSICS
SPECTRA
ZINC SULFIDES