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[????????]Photo Luminescence

PL? ?? ???????. ???? ?? ? ???.
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[????????]Photo Luminescence
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    PL? ?? ???????.
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    Photoluminescence?
    PL spectroscopy
    PL equipments
    Parameters
    PL of some aluminum(III) complexes
    PL vs Raman
    Applications
    References

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    Photoluminescence (PL) is the optical radiation emitted by a semiconducting crystal after excitation with incident light source (usually a laser).
    Photoluminescence?
    semi conducting crystal? band gap ??? ???? ?? ?? ?? ???? conduction band? ??? ???? ??? ?? relaxation? ??? ?? ?? ??? ? ?? Photo-Luminescence?? ???.
    Korea University
    Photoluminescence spectroscopy is a contactless, nondestructive method of probing the electronic structure of materials.
    PL spectroscopy
    PL spectroscopy? ??? ??? ??? ???? contactless?? nondestructive? ?????.
    PL process? ??? ???? ??? ????.
    ??? ?? ??? laser beam? ????? valence band? ??? conduction band? ??(excitation)???.
    ??? conduction band? ???? ????? ?? ??? ??? ??? ? ?? ??? ?? conduction band edge? ???? ???.
    ?? ??? ??? ?? valence band? ???? electron-hole ???(recombination)? ?????.
    ??, ?? electron? hole? valence band? conduction band ??? ???? donor state? acceptor state (Et)? ??? ?? ???? ?? ? ????? ???.
    ??? ?? ?? ??? ?? ??? ??? ???? ???? ??? ??? ????, sample? ??? ?? ???? ?? spectrum? ?????.
    ?? ?? process? ?? ???? ?? spectrum?? ?????? ?? ??? ?? ??? ?? ?? ??? ?? ??, ?? ?? ?? ??? ? ????.

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