Photoconductivity in Lead Selenide. Experimental
- 15 January 1957
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 105 (2), 469-476
- https://doi.org/10.1103/physrev.105.469
Abstract
The electrical and photoconductive properties of evaporated films of PbSe have been investigated using oxygen, sulfur, selenium, and the halogens as sensitizers. Each sensitizer acts as an acceptor impurity; increasing sensitizer concentration causes the film resistance to increase through a maximum and then decrease, the film changing from to type at the resistance maximum. Photoconductivity at room temperature could be produced only by treatment with oxygen; the time constant was of the order of 1 μsec. At -195°C photoconductivity ( μsec) could be produced by any of the sensitizers, while oxygen treatment gave in addition a response with msec. The spectral response extends to longer wavelengths in thick films than in thin films, but is independent of sensitizer used. It is concluded that oxygen introduces acceptor levels which are minority carrier traps, while the other sensitizers introduce acceptor levels which are not effective minority carrier traps.
Keywords
This publication has 16 references indexed in Scilit:
- Further Measurements on the Optical Properties of Lead Sulphide, Selenide and TellurideProceedings of the Physical Society. Section B, 1954
- The Absorption Spectra of Single Crystals of Lead Sulphide, Selenide and TellurideProceedings of the Physical Society. Section B, 1952
- The Long-Wave Limit of Infra-Red Photoconductivity in PbSeProceedings of the Physical Society. Section A, 1951
- Infra-Red Transmission of GalenaProceedings of the Physical Society. Section B, 1951
- The Temperature Variation of the Long-Wave Limit of Infra-Red Photoconductivity in Lead Sulphide and Similar SubstancesProceedings of the Physical Society. Section B, 1949
- Lead Selenide Photo-Conductive CellsJournal of the Optical Society of America, 1948
- Spectral Response of Lead SelenideNature, 1948
- Lead Selenide Cells for Infra-Red SpectroscopyNature, 1947
- Der Diffusionsthermoeffekt in vielkomponentigen IsotopengemischenZeitschrift für Naturforschung A, 1946
- über die elektrischen Eigenschaften des BleisulfidsThe European Physical Journal A, 1942