Bandgap tunability of semiconductor nanocrystals is an area of much active research. Traditionally changes in emission wavelength are observed as an effect of particle size and quantum confinement. Recently, it has been shown that emission wavelength may also be tuned by varying the composition in I-III-VI semiconductor nanocrystals.  In this work, we present findings on the bandgap tunability of AgGaS2 nanocrystals by altering the stoichiometry of silver and gallium present in the final crystal structure.  Composition was controlled by varying precursor ratios during synthesis. The particles were characterized by photoluminescence to determine the emission wavelength, TEM for particle size and shape, and XRD to find the resulting crystal structure.

Synthesis and tunability of silver gallium sulfide nanocrystals

245th National Meeting (2013)

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