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

52.4K
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.
52.4K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.8K
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.
59.8K
Inverting and Non-inverting OpAmps01:20

Inverting and Non-inverting OpAmps

1.9K
In an inverting amplifier, the input voltage is connected through a resistor to the inverting terminal. Meanwhile, the non-inverting terminal is grounded and a feedback resistor is established between the inverting and output terminal, as depicted in Figure 1.
1.9K
The Dot Product01:26

The Dot Product

266
Measuring how one directional quantity affects another along a specific path involves comparing their orientation and strength. When two such quantities are represented using direction and amount, a numerical result is computed to show how much one acts along the path of the other. This result comes from a rule combining both inputs' horizontal and vertical parts and adding the results.This calculation gives a single value that grows larger when both inputs point in similar directions and...
266
Dot Product01:29

Dot Product

1.0K
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...
1.0K
Dot Product: Problem Solving01:21

Dot Product: Problem Solving

725
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...
725

You might also read

Related Articles

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

Sort by
Same author

M phase phosphorylation of the epigenetic regulator UHRF1 regulates its physical association with the deubiquitylase USP7 and stability.

Proceedings of the National Academy of Sciences of the United States of America·2012
Same author

Biosynthesis of ethyl oleate, a primer pheromone, in the honey bee (Apis mellifera L.).

Insect biochemistry and molecular biology·2012
Same author

Co-delivery strategies based on multifunctional nanocarriers for cancer therapy.

Current drug metabolism·2012
Same author

Efficacy of gemifloxacin for the treatment of experimental Staphylococcus aureus keratitis.

Journal of ocular pharmacology and therapeutics : the official journal of the Association for Ocular Pharmacology and Therapeutics·2012
Same author

Expression profile analysis of the polygalacturonase-inhibiting protein genes in rice and their responses to phytohormones and fungal infection.

Plant cell reports·2012
Same author

Characterizing natural dissolved organic matter in a freshly submerged catchment (Three Gorges Dam, China) using UV absorption, fluorescence spectroscopy and PARAFAC.

Water science and technology : a journal of the International Association on Water Pollution Research·2012
Same journal

Bioinspired Electrostatic-Field Perturbated Sensing for General Material Noncontact Perception.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Engineering Layered Magnetic Hydrogels for Cell Placement via Shear and Magnetic Field-Induced Assembly.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Interfacial Acid Sites-Mediated ZnO-Based Electrocatalysts for Sustainable Dual-Pathway H<sub>2</sub>O<sub>2</sub> Production and Rechargeable Zn-H<sub>2</sub>O<sub>2</sub> Electrochemical Cell.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Zein-Ceria Hybrid Microparticles Enable Long-Term ROS-Scavenging Oxygenation for Osteogenic Microtissues Engineering.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Toward Practical Solid-State Lithium Batteries With High-Nickel Cathodes: An Interface-Centered Perspective.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

A Planarity-Hindrance Co-Balance Strategy to Develop Antiparallel H-Aggregates With Minimal Absorbance Blueshift for Type I Photodynamic Therapy.

Advanced materials (Deerfield Beach, Fla.)·2026
See all related articles

Related Experiment Video

Updated: Feb 15, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K

Highly Efficient Inverted Structural Quantum Dot Solar Cells.

Ruili Wang1,2,3, Xun Wu1, Kaimin Xu1

  • 1School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, P.R. China.

Advanced Materials (Deerfield Beach, Fla.)
|January 10, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed highly efficient inverted solar cells using lead sulfide (PbS) colloidal quantum dots (QDs). This breakthrough addresses key challenges in constructing effective p-n heterojunctions, significantly boosting solar cell performance.

Keywords:
band alignmentcolloidal quantum dotsinverted structural solar cellsphotovoltaic devices

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
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 15, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.1K
Compact Quantum Dots for Single-molecule Imaging
17:14

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

18.7K
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
  • Photovoltaics
  • Nanotechnology

Background:

  • Inverted structure solar cells based on colloidal quantum dots (QDs) have historically faced challenges in achieving high efficiency.
  • Key bottlenecks include creating effective p-n heterojunctions at the illumination side with proper band alignment and minimizing interface carrier recombination.

Purpose of the Study:

  • To develop highly efficient inverted structure solar cells utilizing lead sulfide (PbS) colloidal quantum dots (QDs).
  • To overcome limitations in p-n heterojunction formation and interface carrier recombination for improved photovoltaic performance.

Main Methods:

  • Utilized solution-processed nickel oxide (NiO) as the p-type layer and lead sulfide (PbS) QDs with iodide ligands as the n-type layer.
  • Constructed a p-n heterojunction at the illumination side of the inverted solar cell structure.
  • Incorporated a graded interface by inserting a layer of slightly p-doped PbS QDs with 1,2-ethanedithiol ligands to mitigate carrier recombination.

Main Results:

  • Achieved a significant photocurrent due to a large depletion region within the QD layer at the illumination side.
  • Effectively suppressed interface carrier recombination by employing the graded QD layer, leading to enhanced device voltage.
  • Demonstrated a record efficiency of 9.7% for inverted heterojunction PbS QD solar cells, a twofold increase over previous benchmarks.

Conclusions:

  • The developed graded device structure design is highly effective for inverted PbS QD solar cells.
  • This approach successfully addresses critical challenges in heterojunction formation and interface engineering.
  • The achieved 9.7% efficiency marks a substantial advancement in the field of colloidal quantum dot photovoltaics.