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

Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

61.9K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
61.9K
Types of Semiconductors01:20

Types of Semiconductors

1.2K
Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
1.2K
Semiconductors01:22

Semiconductors

1.2K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.2K
Non-ohmic Devices00:51

Non-ohmic Devices

1.3K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.3K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.8K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.8K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

720
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
720

You might also read

Related Articles

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

Sort by
Same author

The effect of micronutrient levels on leukocyte telomere length: A Mendelian randomization study.

Medicine·2026
Same author

Effects of Lactarius hatsudake Fortification on Physicochemical, Microbiological and Antioxidant Properties of Stirred-Type Yogurt during Cold Storage.

Food science of animal resources·2026
Same author

Direct Visualization of Canted Magnetization and Topological Charges in Self-Intercalated van der Waals Magnet Cr<sub>1+δ</sub>Te<sub>2</sub> with Hidden Structural Phases.

ACS applied materials & interfaces·2026
Same author

Chip-Scale Aligned Chiral Carbon Nanotubes Exhibiting Giant Second Harmonic Generation.

ACS nano·2026
Same author

Targeted Prediction and Comprehensive Study of Stirred-Type Yogurt with Mayang <i>Citrus</i> Peel Powder Fortification Utilizing Machine Learning Approaches.

Foods (Basel, Switzerland)·2026
Same author

Luteolin as a novel therapeutic for diabetic kidney disease: Targeting the ADAM10-TREM2 pathway.

Journal of advanced research·2026

Related Experiment Video

Updated: Dec 3, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

18.9K

Perovskite-Derivative Valleytronics.

Jia Liang1,2, Qiyi Fang1, Hua Wang3

  • 1Department of Materials Science and Nano Engineering, Rice University, Houston, TX, 77005, USA.

Advanced Materials (Deerfield Beach, Fla.)
|October 26, 2020
PubMed
Summary
This summary is machine-generated.

Valleytronics offers a new path for halide perovskites in electronics. The Cs3Bi2I9 perovskite derivative shows promise for information storage and processing due to its unique optical and valley properties.

Keywords:
2D materialsall-inorganic materialslead-free materialsperovskite derivativessecond-harmonic generationvalleytronics

More Related Videos

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

17.0K
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

8.5K

Related Experiment Videos

Last Updated: Dec 3, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

18.9K
Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

17.0K
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

8.5K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Halide perovskites are key in renewable energy due to high efficiency and low cost.
  • Challenges in stability hinder halide perovskite applications in electronics.
  • Valleytronics offers a potential solution for information technology applications.

Purpose of the Study:

  • To explore valleytronics as a route for halide perovskites in information storage and processing.
  • To synthesize and characterize a lead-free perovskite derivative for valleytronic applications.
  • To investigate the optical and valley properties of Cs3Bi2I9.

Main Methods:

  • Synthesis of the all-inorganic lead-free perovskite derivative, Cs3Bi2I9.
  • Optical characterization to assess light-matter interaction and valley degree of freedom.
  • First principles calculations to understand the electronic band structure.

Main Results:

  • Cs3Bi2I9 exhibits strong light-matter interaction and optically addressable valley properties.
  • Robust optical helicity observed in odd-layer-number crystals, indicating long-range excitonic coherence.
  • First principles calculations reveal unique parallel bands responsible for the observed properties.

Conclusions:

  • Valleytronics is a promising application for halide perovskite derivatives beyond photovoltaics.
  • Cs3Bi2I9 demonstrates excellent optical and valley properties suitable for electronic devices.
  • The study provides new materials design principles for scalable valleytronic devices.