The synthesis and spectroscopy of semiconductor nanocrystals exhibiting intrinsic, temperature sensitive dual emission is described. Dual emission is observed in these colloidal manganese-doped nanocrystals due to fast population exchange between the Mn2+ (4T1) state and excitonic excited states, within the same nanocrystal. The resulting photoluminescence is strongly temperature dependent and the range of temperature sensitivity can be tuned by changing the energy gap between the Mn2+ (4T1) state and excitonic excited states during growth. The ratio of the two intensities is independent of nonradiative effects. These nanocrystals are suitable for diverse optical thermometric or thermographic applications in biotechnology or other areas.

Mn<sup>2+</sup>-doped nanocrystals exhibiting temperature dependent dual emission

243rd National Meeting (2012)

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Mn2+-doped nanocrystals exhibiting temperature dependent dual emission

Mn²⁺-doped nanocrystals exhibiting temperature dependent dual emission