AI Article Synopsis
- Exciton-phonon coupling affects the clarity of light emitted from nanocrystals, making it important to study this phenomenon.
- This research involves single-particle spectroscopy experiments on various colloidal nanocrystals at approximately 10 K to analyze exciton-phonon interactions.
- The results reveal that the intensity of phonon replicas is linked to charge-carrier distribution, with quantum mechanical calculations suggesting that surface charges play a significant role.
Article Abstract
Exciton-phonon coupling limits the homogeneous emission line width of nanocrystals. Hence, a full understanding of this is crucial. In this work, we statistically investigate exciton-phonon coupling by performing single-particle spectroscopy on colloidal Zn Cd Se/CdS and CdSe/CdS dot-in-rod nanocrystals at cryogenic temperatures ( ≈ 10 K). In situ cation exchange enables us to analyze different band alignments and, thereby, different charge-carrier distributions. We find that the relative intensities of the longitudinal optical S- and Se-type phonon replicas correlate with the charge-carrier distribution. Our experimental findings are complemented with quantum mechanical calculations within the effective mass approximation that hint at the relevance of surface charges.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11413927 | PMC |
| http://dx.doi.org/10.1021/acsphotonics.4c00931 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!