Semiconductors Topics

Amorphous Semiconductor
A non-crystalline semiconductor material that has no long range order.
Amorphous Solar Cell
These cells are not as efficient as the monocrytalline cells but they do perform better in low light levels.
Cadmium Telluride


A polycrystalline thin-film photovoltaic material.

Complimentary Metal Oxide Semiconductor
Family of logic devices that uses p-type and n-type channel devices on the same IC. It has the advantage of offering medium speed and very low power requirements.
Copper Indium Diselenide


A polycrystalline thin-film photovoltaic material.

Chemical formula for Copper Indium Diselenide.
Czochralski Process
A method of growing large size, high quality semiconductor crystals by slowly lifting a seed crystal from a molten bath of the material under careful cooling conditions.
Dangling Bonds
A chemical bond associated with an atom on the surface layer of a crystal.
Diffusion Length
The mean distance a free electron or hole moves before recombining with another hole or electron.
An atom which is likely to give off one or more electrons when placed in a crystal.
Donor Level
The level that donates conduction electrons to the system.
The chemical element (impurity) added in small amounts to an otherwise pure semiconductor material to modify the electrical properties of the material.
The intentional alloying of semiconductor materials with controlled concentrations of donor or acceptor impurities
Extrinsic Semiconductor
A semi-conducting material for hich the electrical behavior is determined by impurities.
Fermi Level
Energy level at which the probability of finding an electron is one-half.
Field Effect Transistor
A transistor that makes use of the field established in a p-type channel semiconductor material to control the flow of current through the channel.
Chemical formula for Gallium Arsenide.
Gallium Arsenide


A crystalline, high-efficiency compound used to make certain types of solar cells and semiconductor material.

Grown Junction
A method of mixing P-type and N-type impurities into a single crystal while the crystal is being grown.
A region of electrical contact between two different materials.
Particle associated with an empty electron level in an almost filled band.
Hole Flow
Current carriers (in transistors) which have a flow in a direction opposite to electron movement.
Indium III Oxide


Used as an n-type semiconductor and as a resistive element in integrated circuits.

Insulated Gate Bipolar Transistor
A three-terminal power semiconductor device, noted for high efficiency and fast switching.
Intrinsic Semiconductor
A semiconductor free of defects or impurities.
I-Type Semiconductor
Semiconductor material that is left intrinsic, or undoped, so that the concentration of charge carriers is characteristic of the material itself rather than of added impurities.
A connection between two or more parts.
Junction Diode
A two-terminal device containing a single crystal of semiconducting material that ranges from P-type at one terminal to N-type at the other.
Junction Transistor
A bipolar transistor constructed from interacting PN junctions.
In a MOSFET device the gate is insulated from the channel by a very thin (typically less than the wavelength of light) layer of glass (silicon dioxide) and the gate is either metal or doped silicon (polysilicon), hence the acronym metal-oxide semiconductor.
Monocrystalline Solar Cell
More expenive to make as the crystals are grown under carefully controlled conditions.
NPN Transistor
Type of bipolar transistor using n-type p-type n-type material in its manufacture.
n-type Semiconductor
A semiconductor for which the predominant charge carriers responsible for electrical conduction are electrons.
A transistor with a window on the top face to allow light to fall on the active surface.
p-n Junction
Boundary or interface between two types of semiconductor material, p-type and n-type, inside a single crystal of semiconductor.
PNP Transistor
Type of bipolar transistor using p-type, n-type, n-type semiconductor material.
Polycrystalline Solar Cell
Cheap to make as the conditions required to produce the silicon wafers do not need to be so tightly controlled.
p-type Semiconductor
A semiconductor for which the predominant charge carriers responsible for electrical conduction are holes.
An element, such as silicon, that is intermediate in electrical conductivity between conductors and insulators, through which conduction takes place by means of holes and electrons.
Semiconductor Detector
Radiation striking very pure Ge and Si semiconductor detectors can excite a large number of electrons into the conduction band leading to a measurable current.
Semiconductors Books
Lists all Semiconductors Books in the Encyclopaedia
Semiconductors Calculations
Lists all Semiconductors Calculations in the Encyclopaedia
Semiconductors Conversions
Lists all Semiconductors Conversions in the Encyclopaedia
Semiconductors Source Code
Lists all Semiconductors Source Code in the Encyclopaedia
Semiconductors Weblinks
Lists all Semiconductors Weblinks in the Encyclopaedia
Solar Cell
A cell that produces current under sunlight.
Solar Cell Efficiency
The ratio of the electric power produced by a photovoltaic device to the power of the sunlight incident on the device.
Split Spectrum Solar Cell
A compound photovoltaic device in which sunlight is first divided into spectral regions by optical means.
A three leaded device (Collector, Base, Emitter) used for amplifying or switching.
Unijunction Transistor
A trigger device that has an emitter lead (e) and two bases B1 and B2.

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Subjects: Materials Physics