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

49.5K
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.
49.5K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

56.8K
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.
56.8K
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

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

1.4K
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...
1.4K
Dot Product01:29

Dot Product

934
The dot product is an essential concept in mathematics and physics.
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
934
Outer Layers of the Cell Envelope01:18

Outer Layers of the Cell Envelope

993
The outermost layers of prokaryotic cells play a critical role in their survival, virulence, and interaction with the environment. These layers, often composed of polysaccharides, polypeptides, or proteins, form protective and adhesive structures that vary in organization and function.Capsules and Slime LayersCapsules are highly organized, tightly bound layers that firmly attach to the bacterial cell wall. Capsules are usually made of polysaccharides, though some are made of polypeptides. These...
993
Dot Product: Problem Solving01:21

Dot Product: Problem Solving

693
The dot product is a powerful tool in problem-solving involving vectors, given that the dot product of two vectors is the product of their magnitudes and the cosine of the angle between them measured anti-clockwise. Solving problems involving the dot product requires understanding its properties and developing a step-by-step process to solve them. Here are the main steps to follow when solving any general problem involving the dot product:
Identify the problem: Start by reading the problem and...
693

You might also read

Related Articles

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

Sort by
Same author

Layered Si<sub>2</sub>Te<sub>3</sub>-based anodes for high-performance Li-ion batteries.

Chemical communications (Cambridge, England)·2025
Same author

Surface Functionalization of 3D-Printed Scaffolds with Seed-Assisted Hydrothermally Grown ZnO Nanoarrays for Bone Tissue Engineering.

ACS applied materials & interfaces·2024
Same author

Highly Efficient and Stable Iridium Oxygen Evolution Reaction Electrocatalysts Based on Porous Nickel Nanotube Template Enabling Tandem Devices with Solar-to-Hydrogen Conversion Efficiency Exceeding 10.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2022
Same author

Novel positive allosteric modulator of protease-activated receptor 1 promotes skin wound healing in hairless mice.

British journal of pharmacology·2021
Same author

Incidence and risk factors of urinary tract infections in hospitalised patients with spinal cord injury.

Journal of clinical nursing·2021
Same author

Phelligridin D maintains the function of periodontal ligament cells through autophagy in glucose-induced oxidative stress.

Journal of periodontal & implant science·2020

Related Experiment Video

Updated: Jan 26, 2026

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.6K

High efficiency Si quantum dot heterojunction solar cells using a single SiOX:B layer.

Tae Gun Kim1, Gyea Young Kwak1,2, Kyungmin Do1

  • 1Division of Industrial Metrology, Korea Research Institute of Science and Standards, Daejeon, 34113, Republic of Korea.

Nanotechnology
|April 6, 2019
PubMed
Summary

Researchers developed a new method for fabricating silicon quantum dot solar cells. This approach significantly improved power conversion efficiency by optimizing silicon quantum dot generation and carrier transport.

More Related Videos

Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
Making Record-efficiency SnS Solar Cells by Thermal Evaporation and Atomic Layer Deposition
14:01

Making Record-efficiency SnS Solar Cells by Thermal Evaporation and Atomic Layer Deposition

Published on: May 22, 2015

43.3K

Related Experiment Videos

Last Updated: Jan 26, 2026

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.6K
Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
Making Record-efficiency SnS Solar Cells by Thermal Evaporation and Atomic Layer Deposition
14:01

Making Record-efficiency SnS Solar Cells by Thermal Evaporation and Atomic Layer Deposition

Published on: May 22, 2015

43.3K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Photovoltaics

Background:

  • Silicon quantum dots (Si QDs) are promising for solar cells but face efficiency limitations.
  • Previous multilayer SiO2/SiOx structures restricted Si QD generation and carrier transport.
  • Low efficiencies were observed in Si QD photovoltaic devices using these structures.

Purpose of the Study:

  • To enhance the efficiency of silicon quantum dot heterojunction solar cells.
  • To overcome the limitations of Si QD generation and photoexcited carrier transport.
  • To develop an optimized single-layer fabrication method.

Main Methods:

  • Applied a single SiOx:B layer fabrication method for Si QD heterojunction solar cells.
  • Optimized oxygen partial pressure and boron doping concentration.
  • Investigated the impact of fabrication parameters on Si QD generation and carrier lifetime.

Main Results:

  • Maximized Si QD generation and photo-excited carrier lifetime at specific oxygen partial pressure (2.7 × 10^-5 Torr) and boron doping (2.27 × 10^21 atoms cm^-3).
  • Achieved over 17% power conversion efficiency in Si QD heterojunction solar cells.
  • Demonstrated the effectiveness of the single-layer fabrication method.

Conclusions:

  • The single SiOx:B layer method effectively enhances Si QD solar cell performance.
  • Optimized fabrication parameters are crucial for maximizing Si QD generation and carrier lifetime.
  • This approach offers a viable pathway to high-efficiency Si QD photovoltaic devices.