Sharp-line and broad-band emission in AgGaS2 crystals

The low-temperature photoluminescence spectra of AgGaS2 are investigated in this work. At 4.2°K, the luminescence spectra are dominated by many sharp lines as well as broad emission bands. A series of emission lines was found to be superimposed on the broad band peaking at ∼ 5000 Å. The series of em...

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Bibliographic Details
Published in:Journal of applied physics 1974-02, Vol.45 (2), p.823-827
Main Authors: Yu, Phil Won, Park, Y. S.
Format: Article
Language:English
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Summary:The low-temperature photoluminescence spectra of AgGaS2 are investigated in this work. At 4.2°K, the luminescence spectra are dominated by many sharp lines as well as broad emission bands. A series of emission lines was found to be superimposed on the broad band peaking at ∼ 5000 Å. The series of emission lines are attributed to phonon-assisted transitions involving an unidentified impurity or defect. Two basic phonons with energies of 5.4 and 7.2 meV are identified from the phonon structure. The 7.2-meV mode is also seen in the Raman spectrum. They are tentatively identified as the lattice modes.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1663325