Doping a semiconductor provides additional charge carriers to the material. The dopant atoms are easily ionized, and this provides the semiconductor with either free electrons in the conduction band or electron vacancies (or holes) in the valence band, both of which allow the semiconductor to conduct electricity.
Semiconductor diodes are made from the same Silicon, and occasionally Germanium, material that transistors, integrated circuits, etc. are made from. Diodes used in early electronic devices were made from vacuum tubes. Somewhat later diodes were made from finned stacks of Selenium. Simple "Crystal Radios" use Galena (lead ore) crystals with a steel pin that is manipulated to find a spot that allows electrical current to flow in only one direction.
An intransic material is a material that have been used in doping process.There are two type of intrinsic material n type and p type.
1) What materials the conductor is made of;2) the average cross-sectional area along the length of the conductor;3) the temperature of a conductor also affects its resistance;4) the length of the conductor is also very important.Generally, the longer the conductor, the higher its resistance.Your students' course materials can probably give you a better answer than mine, or at least you'll know it is the right one.The length, the cross sectional area, temperature of conductor along with the intrinsic property called the specific resistance of the substance.
Electrical resistance. Ohms. How well something conducts electricity is called its conductance, which is measured in siemens (S). Conductance is the reciprocal of an objects electrical resistance. G=1/R
intrinsic semiconductor is an un-doped semiconductor, in which there is no impurities added where as extrinsic semiconductor is a doped semiconductor, which has impurities in it. Doping is a process, involving adding dopant atoms to the intrinsic semiconductor, there by gives different electrical characteristics
To improve the conductivity of intrinsic material, one can introduce dopants to create extrinsic semiconductors. This process modifies the material's electrical properties, boosting its conductivity. Additionally, optimizing the crystal structure and purity of the material can enhance its conductivity.
To make a poor conductor into a better conductor, you can increase its conductivity by adding impurities or doping materials, applying heat to increase kinetic energy of charge carriers, or reducing its length to decrease resistance. In general, manipulating factors that affect conductivity such as temperature, impurities, and length can improve a material's ability to conduct electricity.
The presence of water can increase the conductivity of a material because water contains ions that can carry electric current. When water is present, these ions can move more freely within the material, allowing electricity to flow through it more easily. This makes the material a better conductor of electricity when in contact with water.
Molybdenum is typically considered to be an electrical conductor due to its high thermal and electrical conductivity. Its conductivity properties make it a desirable material for applications where good electrical conductivity is required.
A material with a good thermal conductivity or a thermal conductor.
Intrinsic conduction is conduction in a pure semiconductor due to electrons moving from negative to positive and an equal number of holes moving in the opposite direction. referenced from Dan O'Regan "Real world leaving cert physics"
Any material is classified as conductor or insulator. There is no perfect conductor or perfect insulator. If a material exhibits more conductivity it is called a conductor and materials with very low conductivity are called insulators. Materials with moderate conductivity would have medium range resistance to electricity. In practice, though, a material either conducts or it doesn't. 'Moderate' would be determined by what you were comparing it to.
first of all un-doped semi-conductor is said to be intrinsic semi-conductor so, there is no discussion of either N-type or P-type
Material resistance is not affected by color, texture, or surface finish. It is primarily determined by the material's intrinsic properties such as conductivity, thickness, and temperature.
The conductivity (how well a material conducts) of a material depends on the density of its free electrons (number of free electrons per unit volume). The best metal conductor is silver. Copper's conductivity is 95% that of silver. Gold's conductivity is 65% that of silver. So, as you can see, gold is by no means the 'best' conductor.
You can test a material for conductivity by using a simple circuit with a power source (like a battery) and a bulb connected to the material in question. If the bulb lights up, the material is a conductor. Alternatively, you can use a multimeter to measure the resistance of the material - a low resistance indicates good conductivity.
Thermal conductivity is a Physical property