Question

What is organic semiconductor? Explain with an example.

Answer 1

Hint: In order to solve this question, we are going to first define what an organic semiconductor is, after that we will give the examples of the organic semiconductors and after that one of those examples is explained in terms of composition and the properties.

Complete step-by-step answer:
The solids which are made up of molecules that have pi-bonding between them or the polymers that are made up of hydrocarbons and heteroatoms such as nitrogen, sulfur, and oxygen are called organic semiconductors. These types of semiconductors exist in the form of molecular crystals or amorphous thin films. In general, they are insulators but become semiconducting when the charges present in them are either injected from appropriate electrodes, upon doping or by the process of photoexcitation. The Organic light-emitting diodes (OLEDs), organic solar cells (OSCs), and organic field-effect transistors (OFETs) are a few examples of organic semiconductors.
If we discuss the example of the Organic light-emitting diodes (OLEDs), then, we see that, an organic light-emitting diode (OLED or organic LED), also known as organic electroluminescent (organic EL) diode is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current.

Note: OLEDs are used for creating the digital displays in electronic devices such as television screens, computer monitors, portable systems such as smartphones, handheld game consoles and PDAs. A major area of research is the development of white OLED devices for use in solid-state lighting applications.