Search research articles

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Unveiling the Antioxidant Role of Hemp Oils in Cancer Prevention and Treatment.

Cancers·2025

Same author

Coupled 2D quantum dot films for next generation solar cells: electronic structure and anomalous light absorption behaviour.

Nanoscale·2025

Same author

Optical Absorption in N-Dimensional Colloidal Quantum Dot Arrays: Influence of Stoichiometry and Applications in Intermediate Band Solar Cells.

Nanomaterials (Basel, Switzerland)·2022

Same author

Optical properties of nanocrystal films: blue shifted transitions as signature of strong coupling.

Nanoscale advances·2022

Same author

Band-like transport in "green" quantum dot films: The effect of composition and stoichiometry.

The Journal of chemical physics·2022

Same author

Indirect to Direct Band Gap Transformation by Surface Engineering in Semiconductor Nanostructures.

ACS nano·2021

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Nov 30, 2025

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

Tuning the Radiative Lifetime in InP Colloidal Quantum Dots by Controlling the Surface Stoichiometry.

Panagiotis Rodosthenous¹, Francisco M Gómez-Campos^2,3, Marco Califano^1,4

¹Pollard Institute, School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom.

The Journal of Physical Chemistry Letters

|November 16, 2020

Summary

Indium phosphide (InP) nanocrystals have low quantum yields due to surface issues. Controlling surface stoichiometry, even with perfect surfaces, can significantly improve InP nanocrystal emission properties and quantum yield.

More Related Videos

Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications

Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications

Published on: February 6, 2016

Related Experiment Videos

Last Updated: Nov 30, 2025

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications

Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications

Published on: February 6, 2016

Area of Science:

Materials Science
Nanotechnology
Quantum Dots

Background:

Indium phosphide (InP) nanocrystals often display low photoluminescence quantum yield (PLQY).
This is typically attributed to surface defects and inadequate passivation, leading to trap states that hinder light emission.
Current strategies focus on shell growth for improved passivation and reduced surface states.

Purpose of the Study:

To investigate the intrinsic impact of surface stoichiometry on InP nanostructure optical properties, independent of surface trap states.
To determine if ideal surface conditions alone can explain observed emission characteristics.
To explore the potential for tuning optical properties through surface composition control.

Main Methods:

Utilized atomistic semiempirical pseudopotential modeling.
Simulated InP nanostructures with theoretically perfect surfaces and ideal passivation.
Analyzed the influence of varying surface stoichiometry, specifically the concentration of surface phosphorus atoms.

Main Results:

Even with atomistically perfect surfaces and ideal passivation, InP nanostructures can exhibit long radiative lifetimes (microseconds).
Simulations revealed broad, weak emission and large Stokes' shifts inherent to InP nanostructures.
Optical properties, including radiative lifetimes and emission intensity, varied by orders of magnitude based on surface composition, particularly the P atom ratio.

Conclusions:

Surface stoichiometry, not just defects, plays a critical role in the optical properties of InP nanocrystals.
Optimizing surface composition offers a viable pathway to enhance the quantum yield of InP nanostructures.
This finding suggests a new direction for improving InP nanocrystal performance beyond traditional passivation techniques.