ArticleScience advances2021
Relations between absorption, emission, and excited state chemical potentials from nanocrystal 2D spectra.
Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Generalized Einstein relations between absorption and emission spectra at thermodynamic equilibrium.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Spectator Exciton Effects in Nanocrystals III: Unveiling the Stimulated Emission Cross Section in Quantum Confined CsPbBrJournal of the American Chemical Society · 2024Article
- High-resolution two-dimensional electronic spectroscopy reveals the homogeneous line profile of chromophores solvated in nanoclusters.Nature communications · 2022Article
- Growth kinetics determine the polydispersity and size of PbS and PbSe nanocrystals.Chemical science · 2022Article
- Ultra-small PbS nanocrystals as sensitizers for red-to-blue triplet-fusion upconversion.Chemical science · 2021Article
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
For quantum-confined nanomaterials, size dispersion causes a static broadening of spectra that has been difficult to measure and invalidates all-optical methods for determining the maximum photovoltage that an excited state can generate. Using femtosecond two-dimensional (2D) spectroscopy to separate size dispersion broadening of absorption and emission spectra allows a test of single-molecule generalized Einstein relations between such spectra for colloidal PbS quantum dots. We show that 2D spectra and these relations determine the thermodynamic standard chemical potential difference between the lowest excited and ground electronic states, which gives the maximum photovoltage. Further, we find that the static line broadening from many slightly different quantum dot structures allows single-molecule generalized Einstein relations to determine the average single-molecule linewidth from Stokes' frequency shift between ensemble absorption and emission spectra.
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Registered trials
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