Synthesis of CuInS2 fluorescent nanocrystals and enhancement of fluorescence by controlling crystal defect

Masato Uehara, Kosuke Watanabe, Yasuyuki Tajiri, Hiroyuki Nakamura, Hideaki Maeda

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    167 Citations (Scopus)

    Abstract

    For this study, Cu-In-S nanocrystals were developed as a low toxic fluorescent. The stoichiometric CuInS2 nanocrystals were synthesized facilely by heating a solution of metal complexes and dodecanethiol. The fluorescence would be originated from the crystal defect. We intentionally introduced the crystal defect in nanocrystal with the prospect that the fluorescence intensity would be increased. The defect structure of products was analyzed using Raman spectroscopy and other techniques. The nanocrystals have many defects without phase separation as observed in the bulk material. Consequently, the fluorescence quantum yield achieved ∼5%. Moreover, the fluorescence quantum yield was increased up to 15% by the ZnS coating.

    Original languageEnglish
    Article number134709
    JournalJournal of Chemical Physics
    Volume129
    Issue number13
    DOIs
    Publication statusPublished - 2008

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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