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Related Experiment Video

Updated: May 9, 2026

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

Published on: November 10, 2017

Luminescence upconversion in colloidal double quantum dots.

Zvicka Deutsch¹, Lior Neeman, Dan Oron

¹Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.

Nature Nanotechnology

|August 6, 2013

Summary

This summary is machine-generated.

Colloidal double quantum dots offer tunable, efficient luminescence upconversion. This novel system overcomes limitations of rare-earth-doped materials for applications in bioimaging and photovoltaics.

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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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Published on: October 13, 2017

Area of Science:

Materials Science
Nanotechnology
Quantum Physics

Background:

Luminescence upconversion nanocrystals are crucial for bioimaging and photovoltaic light harvesting.
Existing rare-earth-doped dielectric systems suffer from limited tunability and absorption cross-section.

Purpose of the Study:

To develop an alternative nanocrystalline upconversion system with enhanced spectral tunability and stability.
To explore colloidal double quantum dots as a novel platform for upconversion.

Main Methods:

Synthesized colloidal double quantum dots with tailored composition and morphology.
Investigated a unique upconversion mechanism involving delocalized electrons and a double potential well for holes.
Characterized the upconversion efficiency through intraband absorption and inter-barrier hole transitions.

Main Results:

Achieved a semiconducting nanostructure with quantum confinement effects.
Demonstrated an upconversion mechanism facilitated by intraband hole absorption.
Obtained an overall conversion efficiency of 0.1% per double excitation event.

Conclusions:

Colloidal double quantum dots present a promising alternative to traditional upconversion materials.
This system offers enhanced spectral tunability and stability for advanced applications.
The developed nanostructure provides a new pathway for efficient light energy conversion.