ArticleACS nano2021
Quantitative Electrochemical Control over Optical Gain in Quantum-Dot Solids.
Article in ACS nano, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- Sub-Science advances · 2026Article
- Hot-carrier trapping preserves high quantum yields but limits optical gain in InP-based quantum dots.Nature communications · 2025Article
- Potential of Electrochemical Charge Injection for Quantum Dot Light-Emitting Devices.Chemistry of materials : a publication of the American Chemical Society · 2025Article
- Colloidal quantum dots enable tunable liquid-state lasers.Nature materials · 2025Article
- Quantifying Efficiency Roll-Off Factors in Quantum-Dot Light-Emitting Diodes.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- Temporal Dynamics of Collective Resonances in Periodic Metasurfaces.ACS photonics · 2024Article
- Article
- Guilty as Charged: The Role of Undercoordinated Indium in Electron-Charged Indium Phosphide Quantum Dots.ACS nano · 2023Article
- Colloidal Semiconductor Nanocrystal Lasers and Laser Diodes.Chemical reviews · 2023Review
- Article
- Zero-Threshold Optical Gain in Electrochemically Doped Nanoplatelets and the Physics Behind It.ACS nano · 2022Article
- Toward Bright Mid-Infrared Emitters: Thick-Shell n-Type HgSe/CdS Nanocrystals.Journal of the American Chemical Society · 2021Article
- Electrochemical p-Doping of CsPbBrACS energy letters · 2021Article
- Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Solution-processed quantum dot (QD) lasers are one of the holy grails of nanoscience. They are not yet commercialized because the lasing threshold is too high: one needs >1 exciton per QD, which is difficult to achieve because of fast nonradiative Auger recombination. The threshold can, however, be reduced by electronic doping of the QDs, which decreases the absorption near the band-edge, such that the stimulated emission (SE) can easily outcompete absorption. Here, we show that by electrochemically doping films of CdSe/CdS/ZnS QDs, we achieve quantitative control over the gain threshold. We obtain stable and reversible doping of more than two electrons per QD. We quantify the gain threshold and the charge carrier dynamics using ultrafast spectroelectrochemistry and achieve quantitative agreement between experiments and theory, including a vanishingly low gain threshold for doubly doped QDs. Over a range of wavelengths with appreciable gain coefficients, the gain thresholds reach record-low values of ∼1 × 10
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