Exciton–Exciton Interaction and Optical Gain in Colloidal CdSe/CdS Dot/Rod Nanocrystals
Source abstract
Abstract
Exciton-exciton interaction in dot/rod CdSe/CdS nanocrystals has proved to be very sensitive to the shape of nanocrystals, due to the unique band alignment between CdSe and CdS. Repulsive exciton-exciton interaction is demonstrated, which makes CdSe/CdS dot/rods promising gain media for solution-processable lasers, with projected pump threshold densities below 1 kW cm(-2) for continuous wave lasing.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films · Gold and Silver Nanoparticles Synthesis and Applications
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References (26)
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16. Such decay appeared shorter than the one observed in the low‐excitation photoluminescence in Figure 2a because we could not lower the excitation level as much and still have a detectable signal (0.2 excitons/dot produced ∼10−3differential transmission signal with our sensitivity at ∼2 × 10−4).
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