Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Quantum Numbers02:43

Quantum Numbers

52.3K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.3K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

1.5K
Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
1.5K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.7K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
59.7K
Test for Homogeneity01:23

Test for Homogeneity

2.4K
The goodness–of–fit test can be used to decide whether a population fits a given distribution, but it will not suffice to decide whether two populations follow the same unknown distribution. A different test, called the test for homogeneity, can be used to conclude whether two populations have the same distribution. To calculate the test statistic for a test for homogeneity, follow the same procedure as with the test of independence. The hypotheses for the test for homogeneity can...
2.4K
Metallic Solids02:37

Metallic Solids

20.9K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.9K
Structures of Solids02:22

Structures of Solids

18.2K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
18.2K

You might also read

Related Articles

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

Sort by
Same author

Stabilizing 1.93-eV ultrawide-bandgap perovskites for efficient triple-junction solar cells.

Nature communications·2026
Same author

AI-guided CRISPR screening reveals therapeutic targets in psoriasis.

Nature communications·2026
Same author

Pursuit of advanced fellowships by thoracic surgery residents.

JTCVS open·2026
Same author

Antiphospholipid syndrome (APS) is a platelet factor 4 (PF4)-centric immunothrombotic disorder.

Blood·2026
Same author

Efficient Hybrid Mixed Ion Perovskite Photovoltaics: <i>In Situ</i> Diagnostics of the Roles of Cesium and Potassium Alkali Cation Addition.

Solar RRL·2026
Same author

Nanocrystal-tailored recombination for all-perovskite tandem solar modules.

Nature·2026

Related Experiment Video

Updated: Feb 11, 2026

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K

2D matrix engineering for homogeneous quantum dot coupling in photovoltaic solids.

Jixian Xu1, Oleksandr Voznyy1, Mengxia Liu1

  • 1Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.

Nature Nanotechnology
|April 25, 2018
PubMed
Summary

Colloidal quantum dot (CQD) solar cells achieved a record 12% efficiency by engineering a 2D inorganic matrix. This strategy enhances photocarrier diffusion length, enabling thicker active layers for improved light harvesting and performance.

More Related Videos

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K
Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications
10:56

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

Published on: February 6, 2016

14.6K

Related Experiment Videos

Last Updated: Feb 11, 2026

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K
Synthesis of Cd-free InP/ZnS Quantum Dots Suitable for Biomedical Applications
10:56

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

Published on: February 6, 2016

14.6K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Renewable Energy

Background:

  • Colloidal quantum dots (CQDs) offer tunable absorption spectra for photovoltaic (PV) applications.
  • Current CQD solar cell efficiency is limited by active layer thickness due to photocarrier diffusion length constraints.
  • Previous CQD devices thicker than ~300 nm showed reduced performance.

Purpose of the Study:

  • To develop a strategy for enhancing photocarrier diffusion length in CQD solids.
  • To enable the fabrication of thicker CQD solar cell active layers for improved light harvesting.
  • To achieve higher power conversion efficiencies (PCEs) in CQD-based solar cells.

Main Methods:

  • A matrix engineering strategy using a hybrid inorganic-amine coordinating complex was employed.
  • This approach created a 2D confined inorganic matrix, controlling internanoparticle spacing at the atomic scale.
  • The strategy reduced disorder and improved CQD packing density and uniformity.

Main Results:

  • The engineered matrix significantly enhanced photocarrier diffusion length.
  • Planar CQD devices with doubled active layer thicknesses (~600 nm) were fabricated.
  • Record short-circuit current (JSC) of 32 mA cm⁻² and improved open-circuit voltage (VOC) were achieved.
  • A certified record PCE of 12% was demonstrated.

Conclusions:

  • Matrix engineering is a viable strategy to overcome thickness limitations in CQD solar cells.
  • Enhanced photocarrier diffusion and optimized device structure lead to improved performance.
  • CQD solar cells show significant potential for future renewable energy applications.