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Related Concept Videos

Semiconductors01:22

Semiconductors

1.5K
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...
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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Polymers02:34

Polymers

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Types of Semiconductors01:20

Types of Semiconductors

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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...
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Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.0K
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...
1.0K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

586
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
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Imide-Functionalized Polymer Semiconductors.

Huiliang Sun1,2, Lei Wang1,3, Yingfeng Wang1

  • 1Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 6, 2018
PubMed
Summary
This summary is machine-generated.

Imide-functionalized π-conjugated polymers offer excellent properties for organic electronics. Recent advancements focus on naphthalene diimide, perylene diimide, and bithiophene imide for improved transistors and solar cells.

Keywords:
imide-functionalized polymersorganic electronicsorganic semiconductorsorganic thin-film transistorssolar cells

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Polymer Chemistry

Background:

  • Imide-functionalized π-conjugated polymers exhibit desirable properties like solubility, planarity, tunable band gaps, and good film morphology.
  • The field of organic electronics has seen rapid material development and performance improvements.
  • These polymers are crucial for advanced electronic applications.

Purpose of the Study:

  • To review the recent development of imide-functionalized polymer semiconductors.
  • To summarize their device performance in organic thin-film transistors and polymer solar cells.
  • To provide insights for future material design and optimization.

Main Methods:

  • Literature review focusing on research from the past three years.
  • Analysis of key imide-based polymer structures, including naphthalene diimide, perylene diimide, and bithiophene imide.
  • Evaluation of device performance metrics in organic thin-film transistors and polymer solar cells.

Main Results:

  • Significant progress in synthesizing and characterizing imide-functionalized polymer semiconductors.
  • Demonstrated enhanced performance in organic thin-film transistors and polymer solar cells using these materials.
  • Identification of specific imide derivatives (naphthalene diimide, perylene diimide, bithiophene imide) as leading candidates.

Conclusions:

  • Imide-functionalized polymer semiconductors are highly promising for organic electronics.
  • Continued research into novel imide building blocks can further optimize optoelectronic properties.
  • Future development aims to achieve even higher device performance in organic electronic applications.