The Bridge - Issue 2, 2021 - 14

Feature
Modeling of organic semiconductor
conduction parameters with reference
to inorganic semiconductors
By Abdelhalim Zekry, W. Abdelaziz
The authors are with the Department of Electronics and Electrical Communications, Faculty of Engineering, Ain Shams
University, Cairo, Egypt (e-mail: aaazekry@hotmail.com; eng.walaa2005@gmail.com).
Abstract
This paper shows how the electronic properties of
organic semiconductors can be described in the same
way as the inorganic semiconductors. This is required
for exploiting the existing electron device simulators
in solving also the organic semiconductor devices.
In addition such a description will make such important
class of materials easier to understand.
Introduction
Organic semiconductors can be broadly divided into
polymers and small-molecule materials. There are notable
differences from a chemical point of view between these
two classes, affecting their technological performance.
Polymeric macromolecules are composed by the
repetition of a fundamental unit, called the monomer,
and are soluble in organic solvents. Accordingly, they can
be processed in liquid form. Small-molecule materials,
termed also molecular materials, can be further divided
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into two subgroups, the pigments, which are not soluble
in organic solvents, and dyes, which are soluble. As a
result of their chemical properties, polymers can be
solution processed whereas small-molecule materials
must be in general thermally evaporated.
Studying the properties of organic semiconductors helps
in utilizing them efficiently to innovate new electronic
devices. If these properties are referenced to inorganic
semiconductors [1], then they can be considered as their
extension. As there is a wealth of computer aided analysis
and design tools for the inorganic semiconductors,
then one can apply them also for the modeling and
simulation of the organic semiconductors with the proper
modifications to account for the properties of the organic
materials. So, in this paper the organic semiconductors
are modeled as their inorganic counterparts. The model
similarities and differences are pointed out.
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The Bridge - Issue 2, 2021

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Contents
The Bridge - Issue 2, 2021 - Cover1
The Bridge - Issue 2, 2021 - Cover2
The Bridge - Issue 2, 2021 - Contents
The Bridge - Issue 2, 2021 - 4
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The Bridge - Issue 2, 2021 - Cover3
The Bridge - Issue 2, 2021 - Cover4
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