Admin Table of Contents
What is hopping of charge carriers?
It is well known that charge carriers may travel through the material by hopping from one localized state to the other. The hopping rate at which this occurs is related to the conductivity of the disordered materials and the mobility.
What is meant by organic semiconductor?
Organic semiconductors are solids whose building blocks are pi-bonded molecules or polymers made up by carbon and hydrogen atoms and – at times – heteroatoms such as nitrogen, sulfur and oxygen. They exist in form of molecular crystals or amorphous thin films.
Why are organic semiconductors important?
Organic semiconductors (OSCs) are receiving increasing attention these days because they have many attractive properties – including light weight, low-cost production, low-temperature processing, mechanical flexibility, and abundant availability – that distinguish them from their conventional inorganic counterparts.
What is band transport?
Crystalline solids and molecular solids are two opposite extreme cases of materials that exhibit substantially different transport mechanisms. While in atomic solids transport is intra-molecular, also known as band transport, in molecular solids the transport is inter-molecular, also known as hopping transport.
What is hopping semiconductor?
From Wikipedia, the free encyclopedia. Variable-range hopping is a model used to describe carrier transport in a disordered semiconductor or in amorphous solid by hopping in an extended temperature range. It has a characteristic temperature dependence of.
What is the hopping process?
Basically, summarizing and missing a lot of physicochemical concepts, Hopping mechanisms is the transmission of the proton/hole/electron, etc, charge thereafter, over the orbitals of the different species involved into the process, i.e, all the molecules that are between the donor and the acceptor.
What is the majority charge carrier in p type semiconductor?
holes
In a p-type semiconductor, holes are the majority charge carriers and electrons are minority charge carriers.
When an organic semiconductor absorbs a photon?
Absorption in semiconductors occurs, of course, when an electron absorbs a photon. Often the electron is excited into the conduction band, leaving a hole in the valence band1.
What is the difference between organic and inorganic semiconductor?
Organic semiconductors are made from carbon based materials, whereas inorganic semiconductors are made of noncarbon based materials such as silicon. Both solids and both change their electrical properties once modified by doping or photoexcitation.
What is hopping mechanism?
What is hopping in semiconductor?
Variable-range hopping is a model used to describe carrier transport in a disordered semiconductor or in amorphous solid by hopping in an extended temperature range.