Tunable luminescence properties of AgInS2-ZnS and AgInS2-ZnS@ZnS particles

T. Chevallier; G. Le Blevennec; S. De Sousa Nobre; F. Chandezon

doi:10.1117/12.2023208

13 September 2013 Tunable luminescence properties of AgInS₂-ZnS and AgInS₂-ZnS@ZnS particles

T. Chevallier, G. Le Blevennec, S. De Sousa Nobre, F. Chandezon

Proceedings Volume 8807, Nanophotonic Materials X; 88070X (2013) https://doi.org/10.1117/12.2023208
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

Luminescent nanocrystals of AgIn_S2-ZnS (ZAIS) and core-shell AgInS₂-ZnS@ZnS (ZAIS@ZnS) nanostructures were synthesized with different compositions of the core AgInS2-ZnS solid solution. With this method, luminophores displaying a broad emission spectrum and a maximum emission tunable between 555 nm and 825 nm could be obtained. Their optical absorption and luminescence properties were studied in order to understand the evolution of their optical band gap, their photoluminescence quantum yield (PLQY) and the amount of defects. Ageing tests of the colloidal solutions of these nanocrystals under blue light excitation were also performed. We show that the high PLQY of ZAIS nanocrystals is correlated to the amount of defects they contain which explains the effect of both the composition and the synthesis method on the PLQY. We also show that ZnS coated nanocrystals exhibit high photostability under blue light excitation compared to their non-coated counterparts. These results emphasize the potential of ZAIS nanocrystals as highly luminescent and stable luminophores for white-LED applications.

Citation Download Citation

T. Chevallier, G. Le Blevennec, S. De Sousa Nobre, and F. Chandezon "Tunable luminescence properties of AgInS₂-ZnS and AgInS₂-ZnS@ZnS particles", Proc. SPIE 8807, Nanophotonic Materials X, 88070X (13 September 2013); https://doi.org/10.1117/12.2023208

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