edge-defined film-fed growth (EFG)
A method for making sheets of polycrystalline silicon in which molten silicon is drawn upward by capillary action through a mold.
duty cycle
From Wikipedia, the free encyclopedia A duty cycle is the percentage of one period in which a signal or system is active.[1][2][3] A period is the time it takes for a signal to complete an on-and-off cycle. As a formula, a duty cycle may be expressed as: {displaystyle D={frac {T}{P}}times 100%}[2] where {displaystyle D} is […]
dopant
From Wikipedia, the free encyclopedia A dopant, also called a doping agent, is a trace impurity element that is inserted into a substance (in very low concentrations) to alter the electrical or optical properties of the substance. In the case of crystalline substances, the atoms of the dopant very commonly take the place of elements […]
distributed power
Generic term for any power supply located near the point where the power is used. Opposite of central power. See `stand-alone’; `remote site.’
disconnect
Switch gear used to connect or disconnect components of a PV system for safety or service.
discharge rate
The rate, usually expressed in amperes over time, at which electrical current is taken from the battery.
direct insolation
From Wikipedia, the free encyclopedia Direct insolation is the solar insolation measured at a given location on Earth with a surface element perpendicular to the Sun’s rays, excluding diffuse insolation (the solar radiation that is scattered or reflected by atmospheric components in the sky). Direct insolation is equal to the solar irradiance above the atmosphere […]
direct current (DC)
From Wikipedia, the free encyclopedia Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, power supplies, thermocouples, solar cells, or dynamos. Direct current may flow in a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as […]
diode
From Wikipedia, the free encyclopedia In electronics, a diode is a two-terminal electronic component that conducts primarily in one direction (asymmetric conductance); it has low (ideally zero) resistance to the flow of current in one direction, and high (ideally infinite) resistance in the other. A semiconductor diode, the most common type today, is a crystalline piece […]