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Research Highlight | Center for Nanoscale Materials

Long-lived, bright biexcitons demonstrated in CdZnSe/CdS quantum dots

In a Nano Letters paper, researchers contribute to our understanding of multiexciton photophysics and highlight the practical applications in technologies requiring radiative multiexcitonic emission.

Scientific Achievement

Biexciton lifetimes >10 ns in CdZnSe/CdS quantm dots, much longer than other nanocrystals, are achieved by size and composition gradient control.

Significance and Impact

Long biexciton lifetimes enable bright X-ray scintillation, broadband optical gain, and low-threshold lasers from a solution-processable material.

Research Details

  • Time-resolved spectroscopy, laser cavity measurement, and electron microscopy was performed at CNM
  • Scintillation and imaging performed at APS
  • Synthesis was conducted at UIC.

DOI: 10.1021/acs.nanolett.3c04361

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