Excitonic Absorption Lines of PbS in a CdS−PbS Composite

The spectral dependences of transmission, absorption, and reflection in CdS−PbS semiconductor layers, which are promising for the development of photodetectors and emitters in the region of an atmospheric- transparency window, were studied. It has been established that a series of thin lines are obs...

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Bibliographic Details
Published in:Technical physics letters 2018-04, Vol.44 (4), p.309-312
Main Authors: Trofimova, N. B., Rokakh, A. G., Bochkarev, A. O., Shishkin, M. I.
Format: Article
Language:English
Subjects:
Absorption
Classical and Continuum Physics
Emitters
Excitons
Infrared radiation
Lead sulfides
Physics
Physics and Astronomy
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Summary:The spectral dependences of transmission, absorption, and reflection in CdS−PbS semiconductor layers, which are promising for the development of photodetectors and emitters in the region of an atmospheric- transparency window, were studied. It has been established that a series of thin lines are observed in the infrared spectrum on an absorption edge of the narrow-gap phase (PbS). A method for identification of exciton series was used, and exciton-binding energy E ex , exciton concentration N , and value of valence-band splitting Δ E v were determined.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785018040120