If the electron-hole pair is formed in the space charge region, though, charge separation takes place.    From Wordnik.com.  [Analog Science Fiction and Fact]

It is here that the electron-hole pairs are generated, thus facilitating their movement, as electrons and holes are far less mobile in amorphous silicon than crystalline silicon, and doping worsens this situation (U.S. DOE 1991).    From Wordnik.com.  [4 Photovoltaics] Reference

When current passes through the transistor, some electrons create electron-hole pairs.    From Wordnik.com.  [IEEE Spectrum] Reference

"When visible light strikes this catalyst, electron-hole pairs are produced in the matrix,".    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Hence, no electron-hole combination, no current flow and the junction offers high resistance.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

If the two semiconductors are placed too far apart, the electron-hole pair will die in transit.    From Wordnik.com.  [R&D Mag - News] Reference

Because CCDs do not have inherent gain, one electron-hole pair is accumulated for each detected photon.    From Wordnik.com. Reference

This resistor is used to terminate the cascade of electron-hole production so that the photodiode is ready for the next light pulse.    From Wordnik.com.  [Ars Technica] Reference

An incoming photon creates electron-hole pairs in a semiconducting material, where the electron and hole are separately collected to generate electricity.    From Wordnik.com.  [Newswise: Latest News] Reference

But the same photon might generate more than one electron-hole pair if the material is made into much smaller dimensions - such as the size of a quantum dot.    From Wordnik.com.  [Nano Tech Wire] Reference

Since the light that hits a PV cell has photons with a wide range of energies, it turns out that some of them won't have enough energy to form an electron-hole pair.    From Wordnik.com.  [The British National Party] Reference

Discrete phonons and continuous exciton (electron-hole pair) transitions are coupled by electron-phonon interactions, yielding a new hybrid phonon-exciton excited state.    From Wordnik.com.  [Naturejobs - All Jobs] Reference

In their study, Seidel and his collaborators found that these domain walls can serve the same electron-hole separation purpose as depletion zones only with distinct advantages.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

"First, the passing electrons lose their energy not directly to the heat bath; they transfer their energy to electron-hole plasma, which they generate themselves," Vinokour said.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Photons, usually coming from the sun with the hope as source for renewable energy, are converted into electron-hole pairs that are subsequently extracted into useful electrical current.    From Wordnik.com.  [EE Times-Asia] Reference

When photons from the sun are absorbed, their energy is used to create electron-hole pairs, which are then separated at the interface between the two layers and collected as electricity.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Is the total diode current constant throughout the diode (even for reverse bias?) 2, During reverse saturation current, does electron-hole pair generation take place in the depletion region also?.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

The team has shown that photodiodes made from carbon nanotubes create multiple electron-hole pairs in response to a single photon - unlike other photodiodes, which produce just one pair per photon.    From Wordnik.com.  [optics.org all content] Reference

If a photon has more energy than the required amount, then the extra energy is lost (unless a photon has twice the required energy, and can create more than one electron-hole pair, but this effect is not significant).    From Wordnik.com.  [The British National Party] Reference

When photons from the sun are absorbed, their energy creates electron-hole pairs that can be separated within a "depletion zone," a microscopic region at the p-n junction measuring only a couple of micrometers across, then collected as electricity.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

"It's traditional to generate one electron-hole pair for every absorbed photon in most solar cells," Jabbour says, but researchers in his lab are working on generating more multiple electron-hole pairs per photon to achieve increased power-conversion efficiency.    From Wordnik.com.  [Nano Tech Wire] Reference

This is where the quantum confinement effects become very useful, as the effects couple photogenerated electrons and holes into bound electron-hole pairs called excitons, and encourage the efficient formation of more than one exciton from a single absorbed photon.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

R&D for better materials, designs, and manufacturing methods can also lower costs (reducing thickness of layers by light-trapping, or using bulk heterojunctions, or other more complex topologies of the p-n junction, to reduce recombination of electron-hole pairs; nanostructures to convert higher energy photons into multiple electron-hole pairs).    From Wordnik.com.  [RealClimate] Reference

This is a problem that requires multiple solutions as a consequence of the different parts that are needed to form a simple transistor: the electron-hole transporting p-type semiconductor, the electron-transporting n-type semiconductor, the insulating dielectric layer to keep them apart, and the electrodes to get the current into and out of the transistor.    From Wordnik.com.  [Ars Technica] Reference

RELTRON Fast EL MAPPER SYSTEM SPECIFICATIONS - ICS 1000 EL Image Analysis Suite Electroluminescence Image Analysis function operates as a sub-set of the ICS 1000EL Imaging Control Suite: Electroluminescence Image Analysis is possible as the intensity of an emitted EL signal from Photovoltaic devices is a function of the electron-hole concentration; which in turn is exponentially related to the applied forward bias voltage (the well known IV curve of a diode).    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

(light quanta) with the right energy can excite an electron enough to move it across an energy band gap - thus resulting in an electron-hole pair.    From Wordnik.com.  [Nano Tech Wire] Reference

Thus, tunneling current is controlled by the properties of this electron-hole cloud. ".    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference

Shang said: "When visible light strikes this catalyst, electron-hole pairs are produced in the matrix.    From Wordnik.com.  [Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7] Reference

Besides multijunction cells (which need to be current-matched) and spectral-splitting concentrators (mirror/lens with prism/diffraction grating - or multilayer luminescent concentrators (in skylights, 1 layer for solar UV, 1 layer for solar IR, and let the visible light through) (PS lumninescent concentrators can use diffuse light, as flat panel PV devices can), there is also the potential for using nanoparticles to convert higher energy photons to multiple electron-hole pairs, or using multi-band-gap materials (as I recall, a telluride of Zn, Mn doped with O??).    From Wordnik.com.  [RealClimate] Reference