ArticleScience advances2022
Enhanced emission directivity from asymmetrically strained colloidal quantum dots.
Article in Science advances, 2022. 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.
- Enhancing luminescence of QD thin films, polymer composite films, and LED devices by nanostructures.Innovation (Cambridge (Mass.)) · 2026Review
- Understanding the Potential of Light Absorption in Dots-in-Host Semiconductors.ACS photonics · 2024Article
- Strong high-energy exciton electroluminescence from the light holes of polytypic quantum dots.Nature communications · 2024Article
- Strain-graded quantum dots with spectrally pure, stable and polarized emission.Nature communications · 2024Article
- Synthesis and Optical Properties of CdSeTe/CdZnS/ZnS Core/Shell Nanorods.Nanomaterials (Basel, Switzerland) · 2024Article
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Current state-of-the-art quantum dot light-emitting diodes have reached close to unity internal quantum efficiency. Further improvement in external quantum efficiency requires more efficient photon out-coupling. Improving the directivity of the photon emission is considered to be the most feasible approach. Here, we report improved emission directivity from colloidal quantum dot films. By growing an asymmetric compressive shell, we are able to lift their band-edge state degeneracy, which leads to an overwhelming population of exciton with in-plane dipole moment, as desired for high-efficiency photon out-coupling. The in-plane dipole proportion determined by back-focal plane imaging method is 88%, remarkably higher than 70% obtained from conventional hydrostatically strained colloidal quantum dots. Enhanced emission directivity obtained here opens a path to increasing the external quantum efficiencies notably.
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Registered trials
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