Search results
Results from the WOW.Com Content Network
When a photon hits a piece of semiconductor, one of three things can happen: The photon can pass straight through the semiconductor — this (generally) happens for lower energy photons. The photon can reflect off the surface. The photon can be absorbed by the semiconductor if the photon energy is higher than the band gap value. This generates ...
Indium gallium nitride (InGaN) is a semiconductor material made of a mix of gallium nitride (GaN) and indium nitride (InN). It is a ternary group III–V direct bandgap semiconductor. Its bandgap can be tuned by varying the amount of indium in the alloy from 0.7 eV to 3.4 eV, thus making it an ideal material for solar cells. [35]
[19] [20] [21] Besides, thermophotovoltaics embedded with narrow-gap semiconductors can potentially use the traditionally wasted portion of solar energy that takes up ~49% of the sun light spectrum. [ 22 ] [ 23 ] Spacecraft, deep ocean instruments, and vacuum physics setups use narrow-gap semiconductors to achieve cryogenic cooling .
Solar panels need to have a lot of surface area that can be pointed towards the Sun as the spacecraft moves. More exposed surface area means more electricity can be converted from light energy from the Sun. Since spacecraft have to be small, this limits the amount of power that can be produced. [1]
A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species. These semiconductors form for example in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony, bismuth).
-Small countries suddenly become major players in global geopolitics. In the oil era, think of Saudi Arabia and Iran. In the semiconductor era, Taiwan and South Korea produce 100% of the most ...
(Bloomberg Opinion) -- Among the many uncomfortable truths revealed by the coronavirus pandemic is, apparently, this: America can’t build anymore. Faced with an unprecedented emergency, U.S ...
Due to its proximity to Earth, the Sun is the brightest source of astronomical radio emission. But of course, other stars also produce radio emission and may produce much more intense radiation in absolute terms than is observed from the Sun.