In a semiconductor, current is produced in two different ways. There are the electron current and the hole current. The electron current is produced when electrons are pushed from the negative terminal into the semiconductor. Note that both kinds of current exist in any given semiconductor with varying significance.

Increasing the battery voltage will increase the number of majority carriers arriving at the junction and will therefore increase the current flow.

Current flow in a semiconductor arises from the motion of charge carriers in both the conduction and valence bands. As explained in chapter 4, the mobile charges in the conduction band are electrons and those in the valence band are holes.

P-type semiconductors are created by doping an intrinsic semiconductor with an electron acceptor element during manufacture. The term p-type refers to the positive charge of a hole. As opposed to n-type semiconductors, p-type semiconductors have a larger hole concentration than electron concentration.

p-type and n-type materials are simply semiconductors, such as silicon (Si) or germanium (Ge), with atomic impurities; the type of impurity present determines the type of the semiconductor.

Different Types of Semiconductor Devices

• Diode.
• Schottky Diode.
• Light Emitting Diode (LED)
• DIAC.
• Zener Diode.
• Photo Diode (Photo Transistor)
• PIN Diode.
• Laser Diode.

Definition: Once the trivalent material is given to a pure semiconductor (Si/Ge) is known as a p-type semiconductor. Here, trivalent materials are Boron, Indium, Gallium, Aluminium, etc. So the p-type semiconductor examples are gallium otherwise boron.

The symbols p and n come from the sign of the charge of the particles: positive for holes and negative for electrons.

In N-type semiconductor, electrons are majority carriers and holes are minority carriers. In P-type semiconductor, holes are majority carriers and electrons are minority carriers. It has Larger electron concentration and less hole concentration. It has Larger hole concentration and less electron concentration.

The Fermi level of p-type semiconductor mainly lies among the energy level of acceptor & the valence band. In p-type, the energy level of the acceptor is near to the valence band & absent from the conduction band. In n-type, the energy level of the donor is near to the conduction band & absent from the valence band.

Since the minority carriers are electrons and holes in p-type and n-type semiconductors, respectively, the order of increase in electron density in p-type semiconductor and hole density in n-type one are more sensible than increase in hole density in p-type semiconductor and electron density in n-type one, respectively …

Semiconductor, any of a class of crystalline solids intermediate in electrical conductivity between a conductor and an insulator. Semiconductors are employed in the manufacture of various kinds of electronic devices, including diodes, transistors, and integrated circuits.

CPUs that operate personal computers are also made with semiconductors. Many digital consumer products in everyday life such as mobile phones / smartphones, digital cameras, televisions, washing machines, refrigerators and LED bulbs also use semiconductors.

Semiconductors. Semiconductors are materials which have a conductivity between conductors (generally metals) and nonconductors or insulators (such as most ceramics). Semiconductors can be pure elements, such as silicon or germanium, or compounds such as gallium arsenide or cadmium selenide.

A semiconductor is called a semiconductor because it is a type of material that has an electrical resistance which is between the resistance typical of metals and the resistance typical of insulators, so it kind of, or “semi”-conducts electricity. Semiconductors are also used for other special properties.

Semiconductors are an essential component of electronic devices, enabling advances in communications, computing, healthcare, military systems, transportation, clean energy, and countless other applications.

Function / Application A semiconductor can help controlled flow of electricity. The basic function of such a device is to switch ON and OFF the flow of electricity as and when required. A semiconductor device can perform the function of a vacuum tube with hundreds of times its volume.

At absolute zero, semiconductors are perfect insulators, The density of electrons in conduction band at room temperature is not as high as in metals, thus cannot conduct current as good as metal. The electrical conductivity of semiconductor is not as high as metal but also not as poor as electrical insulator.

Semiconductors are made from materials that have free electrons in their structure that can move easily between atoms, which aids the flow of electricity. Silicon has four electrons in its outer orbital, which allows the covalent bonds to form a lattice and thus form a crystal.

Answer. Answer: Semiconductors are materials which have a conductivity between conductors (generally metals) and nonconductors or insulators (such as most ceramics). Semiconductors can be pure elements, such as silicon or germanium, or compounds such as gallium arsenide or cadmium selenide.

Intrinsic Semiconductor,Extrinsic Semiconductor MCQs. N-Type Semiconductor,P-type Semiconductor MCQs. p-n Junction MCQs. Effect of temperature on the conductivity of semiconductor MCQs.