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Photopyroelectric spectroscopy (P2ES) of electronic defect centers in crystalline n-CdS

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Abstract

Photopyroelectric spectroscopy (P2ES) of n-CdS single crystals was performed at an open circuit, and in conjunction with photocurrent spectroscopy (PCS) in the presence of an applied ac or dc transverse field. The results showed that P2ES is very sensitive to the presence of deliberately introduced subbandgap defect structures, with the P2E signal dominated by non-radiative de-excitation mechanisms at defect centers. The potential of this technique as a powerful electronic defect diagnostic tool, combined with the overall experimental simplicity, was demonstrated with mm-thick crystals used as received in an open-cell geometry.

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Authors and Affiliations

  1. Photoacoustic and Photothermal Sciences Laboratory, Department of Mechanical Engineering, University of Toronto, M5S 1A4, Toronto, Canada

    A. Mandelis, W. Lo & R. E. Wagner

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  1. A. Mandelis
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  2. W. Lo
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  3. R. E. Wagner
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Mandelis, A., Lo, W. & Wagner, R.E. Photopyroelectric spectroscopy (P2ES) of electronic defect centers in crystalline n-CdS. Appl. Phys. A 44, 123–130 (1987). https://doi.org/10.1007/BF00626412

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  • DOI: https://doi.org/10.1007/BF00626412

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