Semiconductor

Compound semiconductor (22)
Magnetic semiconductor (103)
Organic semiconductor (69)
Semiconductor (719)
Wide-bandgap semiconductor (25)

Synopsis: Electronics: Electronics branches: Semiconductors: Semiconductor:

#says Huang Deray, former director of Hsinchu Science Park, home to 400 hi-tech companies and a world leader in semiconductor manufacturing."

and the plastic connectors, the semiconductors for processors, and the energetics and propulsion systems. The hard part is then making the connections between these components,

since a semiconductor and a metal couldn t coexist at the nanoscale at high density Kono says.

That structure can then be coated with a thin layer of just about any kind of material#a metal an alloy a glass a semiconductor etc.

Based on his designs The french semiconductor manufacturer STMICROELECTRONICS fabricated 100 of these radios-on-a-chip.

which Yakobson says keeps them from slipping into a less-stable Peierls distortion. eierls said one-dimensional metals are unstable and must become semiconductors

because there are two driving factors. ne the Peierls distortion ants to open the gap that makes it a semiconductor.

It consists of a layer of cadmium sulfide a semiconductor that is laid on top of a sheet of silver with a layer of magnesium fluoride in the middle.

This quality increases the interaction of the molecules with natural surface defects on the semiconductor.

The device works by detecting the increased intensity in the light signal that occurs as a result of this interaction. e think that higher electron deficiency of explosives leads to a stronger interaction with the semiconductor sensorsays study co-lead author Sadao

##and using the optical gain from the semiconductor to amplify the light energy. The amplified sensor creates a much stronger signal than the passive plasmon sensors currently available

Collecting sunlight using these tiny colloidal quantum dots depends on two types of semiconductors: n-type which are rich in electrons and p-type

and semiconductors are known to be fundamentally important in processes such as plant photosynthesis and optical communications that are the basis for the internet and cable TV.

much as the ability to grow silicon in perfect crystalline arrangements made possible the multibillion-dollar semiconductor industry. irkin s

The team previously reported the first observation of superfluorescence in a solid-state system by strongly exciting semiconductor quantum wells in high magnetic fields.

However electrons and holes in semiconductors are charged particles so they interact more strongly than atoms

The self-healing electrode which is made from silicon microparticles that are used widely in the semiconductor

#Solvent safely turns semiconductors into ink University of Southern California rightoriginal Studyposted by Robert Perkins-USC on November 13 2013a new solvent can dissolve semiconductors safely and at room temperature.

Once dissolved the semiconductor solution can be applied as a thin film to substrates like glass and silicon.

Once heated the solvent evaporates leaving behind only a high-quality film of crystalline semiconductor##perfect for use in electronics. t s inexpensive and easily scalablesays Richard Brutchey a chemistry professor at the University of Southern

ur chemical understanding of the solvent system and how it works should allow us to expand it to the dissolution of a wide range of materials. hile the technology already exists to rintelectronics using semiconductor nksat room temperature the problem until now is that the only substance that could effectively dissolve semiconductors

Brutchey and David Webber of USC mixed two compounds to create the new solvent that effectively dissolves a class of semiconductors known as chalcogenides. hen the two compounds work together they do something quite remarkablesays Brutchey.

and 12-ethylenediamine (a colorless liquid that smells like ammonia) is able to effectively dissolve a series of nine semiconductors made from combinations of arsenic antimony bismuth sulfur selenium and tellurium.

Such semiconductors are used often in lasers optics and infrared detectors. The National Science Foundation and USC funded the work.

#Photon detector is quantum leap from semiconductors A new superconducting detector array can measure the energy of individual photons.

of physics at University of California Santa barbara. n a pixel-per-pixel basis it s a quantum leap from semiconductor detectors;

it s as big a leap going from film to semiconductors as it is going from semiconductors to these superconductors.

and other semiconductor-based detectors for the optical and near-IR have started to hit fundamental limits in their per-pixel performancemazin adds. hey ve gotten about as good as they can get in a given pixel.

But until now it hasn t been clear that CNTS a semiconductor material could fulfill those expectations. here is no question that this will get the attention of researchers in the semiconductor community

and its cousins. uch concerns arise from the demands that designers place upon semiconductors and their fundamental workhorse unit those on-off switches known as transistors.

Depending on how the CNTS grow a fraction of these carbon nanotubes can end up behaving like metallic wires that always conduct electricity instead of acting like semiconductors that can be switched off.

Then they pumped the semiconductor circuit full of electricity. All of that electricity concentrated in the metallic nanotubes

Though it could take years to mature the Stanford approach points toward the possibility of industrial-scale production of carbon nanotube semiconductors according to Naresh Shanbhag a professor at the University of Illinois at Urbana-Champaign

The new approach could have applications for the semiconductor and magnetic storage industries. Researchers were able to increase the resolution of their intricate structure fabrication from approximately 200 nanometers to approximately 15 nanometers.

#One benefit of the electrically driven polariton laser is it only needs to be attached to a power supply to emit photons allowing it to be integrated easily with existing semiconductor chips in the future.

and requires constant cooling by liquid helium to prevent the excitons inside the gallium arsenide semiconductors from being pulled apart by thermal energy.

#We re hoping we can replace conventional semiconductor lasers with these polariton lasers in the future#Kim says.#

Existing infrared detectors use cryogenically cooled semiconductors or thermal detectors known as microbolometers in which changes in electrical resistance can be correlated to temperatures.

#Ambiq Micro has made a chip that consumes 10 times less energy Ambiq Micro, a semiconductor company in Austin,

and no moving parts to break and since the TEG is made from solid state semiconductor elements,

and more organic designs for CMOS (complementary metal-oxide semiconductor) sensors and other photodetectors used in cameras.

A semiconductor controls the process, allowing the electrode to heat and cool quickly. It s also completely safe,

By integrating a basket of public Iot semiconductor companies (highlighted by Goldman sachs; note: Making S-E-N-s-E of the next mega-trend) with Google Trends data containing the phraseiot,

According to the semiconductor industry s roadmap transistors at that point must have features as small as five nanometers to keep up with the continuous miniaturization of computer chips.

says However, for now IBM s nanotube effort remains within its research labs, not its semiconductor business unit.

and has devised processes that should be amenable to the semiconductor industry. Via Technology Revie e

and goggles who handle fragile nanotechnology equipment at a high-tech semiconductor lab. The long effort has yielded the Ostendo Quantum Photonic Imager, an appropriately sci-fi-sounding name,

from living cells to semiconductors, mixing and matching the nkswith precision? Jennifer Lewis, a materials scientist at Harvard university, is developing the chemistry

The researchers say this could be used as a self-healing adhesive to repair defective semiconductor chips, for example.

The successful maser demonstration represents a breakthrough in efforts to build a quantum computer out of semiconductor materials.

which is entanglement between quantum bits in semiconductor-based devices, "said collaborator Jacob Taylor, an adjunct assistant professor at the Joint Quantum Institute, University of Maryland-National Institute of Standards and Technology.

Hong and his colleagues used a technique that is well known in the semiconductor industry chemical vapour deposition.

"Hong thinks that graphene's most promising application will be to replace the silicon-based materials used in semiconductor technologies.

First, arrange microscopic flecks of gold on a semiconductor background. Using the gold as seeds,

The promise starts with the novel semiconductor#a combination of indium and phosphorus that absorbs much of the light from the sun (a property known as its band gap).

At the same time the novel cells could be built into so-called multijunction solar cells#compound devices that incorporate several different types of semiconductor material in layers like a sandwich to absorb as much of the energy in sunlight as possible.

made from a semiconductor material, commonly cadmium selenide. They are so tiny that their shape

Whereas a bulk semiconductor is limited to emitting a single colour of light researchers can tune the precise colour a quantum dot will absorb

later it may target the laser, semiconductor and solar-cell industries. He realizes that, by selling the system,

a voltage at the transistor s gate terminal allows current to flow through a semiconductor inside the device.

If the semiconductor is small enough#a nanoparticle, for example#a single electron can switch the transistor on,

but most require very low temperatures#otherwise, the electrons gather enough energy to tunnel through the semiconductor,

Quantum dots are light-emitting semiconductor nanocrystals that can be tuned by changing their size, nanometer by nanometer to emit all colors across the visible spectrum.

This behavior is similar to that of traditional semiconductors such as silicon and germanium. But if the graphene starts out with high electron concentration the pulse decreases its conductivity the same way that a metal usually behaves.

Our experiment reveals that the cause of photoconductivity in graphene is very different from that in a normal metal or semiconductors,

and semiconductor circuits has been understood theoretically for decades. But exciton movement within materials has never been observed directly.

changing it from a conductor to a semiconductor just by changing the laser beam polarization. Normally, to produce such dramatic changes in a material properties,

are made of metals, semiconductors, and glass, and can damage nearby tissues during ordinary movement. t a big problem in neural prosthetics,

The prototype chip was manufactured through the Taiwan Semiconductor Manufacturing Company's University Shuttle Program. Ups and downs The circuit chief function is to regulate the voltages between the solar cell, the battery,

#Making the new silicon An exotic material called gallium nitride (Gan) is poised to become the next semiconductor for power electronics,

But Gan and other nonsilicon semiconductors are manufactured also in special processes, which are expensive. To drop costs, the MIT researchers at the Institute and, later, with the company developed new fabrication technologies,

and n-type semiconductors silicon that has either more positive or more negative charge carriers. The junctions between p-and n-type semiconductors are the building blocks of electronic devices.

Put together in sequence these p-n junctions form transistors which can in turn be combined into integrated circuits microchips and processors.

what p-n junctions and complementary circuitry has done for the current state-of-the-art semiconductor electronics. What's even more exciting are the enabling of optoelectronics using graphene

This ability would represent an advantage over chemically doped semiconductors. Once the atomic impurities are mixed into the material to change its carrier density they can't be removed.

but semiconductors allow a measure of control over those electrons. Since modern electronics are all about control,

Writing in IEEE Spectrum on Monday Prachi Patel similarly made note that Quantum dots (QDS) are light-emitting semiconductor nanocrystals that used in light-emitting diodes (LEDS) hold the promise of brighter faster displays.

#Stacking two-dimensional materials may lower cost of semiconductor devices A team of researchers led by North carolina State university has found that stacking materials that are only one atom thick can create semiconductor junctions that transfer charge efficiently regardless of

This work demonstrates that by stacking multiple two-dimensional (2-D) materials in random ways we can create semiconductor junctions that are as functional as those with perfect alignment says Dr. Linyou Cao senior author of a paper on the work

For most semiconductor electronic or photonic devices to work they need to have a junction

which is where two semiconductor materials are bound together. For example in photonic devices like solar cells lasers and LEDS the junction is where photons are converted into electrons or vice versa.

All semiconductor junctions rely on efficient charge transfer between materials to ensure that current flows smoothly

To do that in conventional semiconductor junctions the crystalline structures of both materials need to match.

And that limited number of material matches restricts the complexity and range of possible functions for semiconductor junctions.

We used molybdenum sulfide and tungsten sulfide for this experiment but this is a fundamental discovery that we think applies to any 2-D semiconductor material.

or more semiconductor materials and you can stack them randomly but still get efficient charge transfer between the materials.

Currently creating semiconductor junctions means perfectly matching crystalline structures between materials -which requires expensive equipment sophisticated processing methods and user expertise.

Researchers capture microimages of micropillar P/N junctions on a semiconductor More information: Nano Letters pubs. acs. org/doi/abs/10.1021/nl503817 7

This shows that we can use 3-D printing to create complex electronics including semiconductors said Mcalpine an assistant professor of mechanical and aerospace engineering.

The geometry of a nanoparticle is often as influential as its chemical makeup in determining how it behaves from its catalytic properties to its potential as a semiconductor component.

They have demonstrated for the first time the on-demand emission of electron pairs from a semiconductor quantum dot and verified their subsequent splitting into two separate conductors.

As an electron source the physicists from Leibniz University Hannover and from PTB used so-called semiconductor single-electron pumps.

This is an important step towards the envisioned generation and separation of entangled electron pairs in semiconductor components s

The researchers took a page from the paper industry using one of its processes to make a flat mesh out of light-absorbing semiconductor nanowires that

The researchers combined semiconductor nanorods and carbon nanotubes to create a wireless light-sensitive flexible film that could potentially replace a damaged retina.

and semiconductor nanorod film will serve as a compact replacement for damaged retinas. We are still far away from actually replacing the damaged retina said Dr. Bareket.

Making the solid-state device is just like making a sandwich just with ultra high-tech semiconductor tools used to slice

First they made a sandwich composed of two metal electrodes separated by a two-nanometer thick insulating layer (a single nanometer is 10000 times smaller than a human hair) made by using a semiconductor technology called atomic layer deposition.

Quantum dots are light-emitting semiconductor nanocrystals that can be tuned by changing their size, nanometer by nanometer to emit all colors across the visible spectrum.

The high-energy plasma can deposit highly transparent and conductive thin films create high quality semiconductors and pattern micro-or nanoscale devices thus making the display images brighter and clearer.

#New way to move atomically thin semiconductors for use in flexible devices Researchers from North carolina State university have developed a new way to transfer thin semiconductor films

Mos2 is an inexpensive semiconductor material with electronic and optical properties similar to materials already used in the semiconductor industry.

It's old news that the semiconductor industry is starting to run up against physical limits to the decades-long trend of ever-denser integrated chips with smaller and smaller feature sizes,

"The issue in semiconductor lithography is not really making small featuresou can do thatut you can't pack them close together,

The global market for graphene is reported to have reached US$9 million this year with most sales concentrated in the semiconductor electronics battery energy and composites.

One property that distinguishes these materials from traditional semiconductors like silicon is that they are mechanically flexible.

Electronics based on carbon especially carbon nanotubes (CNTS) are emerging as successors to silicon for making semiconductor materials.

which are made from layers of semiconductors materials that act like a cross between a conductor and an insulator the electrical properties

As the main enabling technology of the semiconductor industry CMOS fabrication of silicon chips approaches fundamental limits, the TUM researchers and collaborators at the University of Notre dame are exploring"magnetic computing"as an alternative.

"All players in the semiconductor business benefit from one industry-wide cooperative effort: developing long-range"roadmaps"that chart potential pathways to common technological goals.

In the most recent issue of the International Technology Roadmap for Semiconductors, nanomagnetic logic is given serious consideration among a diverse zoo of"emerging research devices."

Semiconductors and insulators derive their electrical properties from a gap between the highest band occupied by electrons known as the valence band

#Solar cell compound probed under pressure Gallium arsenide Gaas a semiconductor composed of gallium and arsenic is well known to have physical properties that promise practical applications.

Silicon nanoparticles such as those in RM 8027 are being studied as alternative semiconductor materials for next-generation photovoltaic solar cells and solid-state lighting,

and solar cells crafted with inorganic compound semiconductor micro-rods are moving one step closer to reality thanks to graphene and the work of a team of researchers in Korea.

But inorganic compound semiconductors such as gallium nitride (Gan) can provide plenty of advantages over organic materials for use in these devices#including superior optical electrical and mechanical properties.

One major obstacle that has prevented so far the use of inorganic compound semiconductors in these types of applications was the difficulty of growing them on flexible substrates.

The researchers then patterned graphene devices using semiconductor processing techniques before attaching a number of bioreceptor molecules to the graphene devices.

therefore firmly establishes correlated oxides as promising semiconductors for future three-dimensional integrated circuits as well as for adaptive, tunable photonic devices.

which is a foundational step in the use of any semiconductor, "says Ramanathan. Doping is the process of introducing different atoms into the crystal structure of a material,

That's a fundamentally different approach than is used in other semiconductors. The traditional method changes the energy level to meet the target;

That structure can then be coated with a thin layer of just about any kind of material metal, an alloy, a glass, a semiconductor, etc.

#Doped graphene nanoribbons with potential Graphene is a semiconductor when prepared as an ultra-narrow ribbon although the material is actually a conductive material.

which enables semiconductors to be in an insulating state. The problem however is that the bandgap in graphene is extremely small.

and negative charges across different regions of the semiconductor crystal thereby creating the basic structure allowing the development of many components used in the semiconductor industry.

Transferring graphene nanoribbons onto other substratesin addition the scientists have solved another key issue for the integration of graphene nanotechnology into conventional semiconductor industry:

Graphene is thus increasingly emerging as an interesting semiconductor material and a welcome addition to the omnipresent silicon.

#Team develops ultra sensitive biosensor from molybdenite semiconductor Move over graphene. An atomically thin two-dimensional ultrasensitive semiconductor material for biosensing developed by researchers at UC Santa barbara promises to push the boundaries of biosensing technology in many fields from health care to environmental protection to forensic industries.

Based on molybdenum disulfide or molybdenite (Mos2) the biosensor materialsed commonly as a dry lubricanturpasses graphene's already high sensitivity offers better scalability

Semiconductor materials have a small but nonzero band gap and can be switched between conductive and insulated states controllably.

Enter Mos2 a material already making waves in the semiconductor world for the similarities it shares with graphene including its atomically thin hexagonal structure and planar nature as well as

act like a semiconductor. Monolayer or few-layer Mos2 have a key advantage over graphene for designing an FET biosensor:

At present the scientific community worldwide is actively seeking practical applications of 2d semiconductor materials such as Mos2 nanosheets.

In bulk Mos2 electrons and photons interact as they would in traditional semiconductors like silicon and gallium arsenide.

Scientists from NIST's Physical Measurement Laboratory, led by the Semiconductor and Dimensional Metrology Division's David Gundlach and Curt Richter,

and how long does it take to get the photogenerated charge through the semiconductor mixture to the electrodes?

and carrier concentrations with an accurate nanoscale picture of the semiconductor film's microstructure really gives a complete picture of how the device operates and

#Scientists craft atomically seamless thinnest-possible semiconductor junctions Scientists have developed what they believe is the thinnest-possible semiconductor,

a new class of nanoscale materials made in sheets only three atoms thick. The University of Washington researchers have demonstrated that two of these single-layer semiconductor materials can be connected in an atomically seamless fashion known as a heterojunction.

This result could be the basis for next-generation flexible and transparent computing, better light-emitting diodes,

The researchers discovered that two flat semiconductor materials can be connected edge-to-edge with crystalline perfection.

which was key to creating the composite two-dimensional semiconductor. Collaborators from the electron microscopy center at the University of Warwick in England found that all the atoms in both materials formed a single honeycomb lattice structure, without any distortions or discontinuities.

thinnest-possible semiconductor junctions A high-resolution scanning transmission electron microscopy (STEM) image shows the lattice structure of the heterojunctions in atomic precision.

"Scientists craft atomically seamless, thinnest-possible semiconductor junctions With a larger furnace, it would be possible to mass-produce sheets of these semiconductor heterostructures,

the researchers said. On a small scale, it takes about five minutes to grow the crystals, with up to two hours of heating and cooling time."

Researchers demonstrate ultrafast charge transfer in new family of 2-D semiconductors A new argument has just been added to the growing case for graphene being bumped off its pedestal as the next big thing in the high-tech world by the two-dimensional semiconductors

These 2d semiconductors feature the same hexagonal"honeycombed"structure as graphene and superfast electrical conductance,

"For example, the combination of Mos2 and WS2 forms a type-II semiconductor that enables fast charge separation.

"MX2 semiconductors have extremely strong optical absorption properties and compared with organic photovoltaic materials, have a crystalline structure and better electrical transport properties,

and MX2 semiconductors provide an ideal way to spatially separate electrons and holes for electrical collection and utilization."

It uses an aluminum grating that can be added to silicon photodetectors with the silicon microchip industry's mainstay technology complementary metal-oxide semiconductor or CMOS.

#An inkjet-printed field-effect transistor for label-free biosensing Thin-film transistors (TFTS) are powerful devices in semiconductor manufacturing

At the Vienna University of Technology, Thomas Mueller, Marco Furchi and Andreas Pospischil have managed to create a semiconductor structure consisting of two ultra-thin layers,

Now, this semiconductor has successfully been combined with another layer made of molybdenum disulphide, creating a designer-material that may be used in future low-cost solar cells.

His team was the first to combine two different ultra-thin semiconductor layers and study their optoelectronic properties.

Tungsten diselenide is a semiconductor which consists of three atomic layers. One layer of tungsten is sandwiched between two layers of selenium atoms."

A metal semiconductor and insulator purified silicon is extremely stable and has become essential to the integrated circuits and transistors that run most of our computers.

lithium secondary batteries, sensors, and semiconductors

#A crystal wedding in the nanocosmos Researchers at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), the Vienna University of Technology and the Maria Curie-Sklodowska University Lublin have succeeded in embedding nearly perfect semiconductor crystals

into a silicon nanowire. With this new method of producing hybrid nanowires, very fast and multifunctional processing units can be accommodated on a single chip in the future.

In contrast to silicon, many of such semiconductors with extremely high electron mobility could improve performance of the most modern silicon-based CMOS technology.

a semiconductor, laid on top of a sheet of silver with a layer of magnesium fluoride in the middle.

This quality increases the interaction of the molecules with natural surface defects on the semiconductor.

Potential use to sense hard-to-detect explosive"We think that higher electron deficiency of explosives leads to a stronger interaction with the semiconductor sensor"

and using the optical gain from the semiconductor to amplify the light energy. Zhang said the amplified sensor creates a much stronger signal than the passive plasmon sensors currently available

and whether they acted as metals semiconductors or insulators under strain. Toggling between or sustaining those conductive properties are particularly important for future applications in microelectronics.

The newly developed material can be used as a substitute for graphene in solar cells and semiconductor chips.

Nanowires are extremely fast, efficient semiconductors, but to be useful for electronics applications, they need to be packed together in dense arrays.

In 2009, the International Technology Roadmap for Semiconductors (ITRS) selected carbon-based nanoelectronics to include carbon nanotubes

platinum and other metallic nanoparticles Clem said the researchers are now starting to work with semiconductors.

The findings have broad implications for the semiconductor industry and beyond. They show, for the first time, exactly how some memristors remember."

which is used commonly in the semiconductor industry to help route electricity. They observed the metal atoms becoming charged ions, clustering with up to thousands of others into metal nanoparticles,

so it is a semiconductor. Explore further: Hybrid nanotube-graphene material promises to simplify manufacturing More information:

but is enhanced appreciably in ultrasmall semiconductor particles also called quantum dots as was demonstrated first by LANL researchers in 2004 (Schaller & Klimov Phys.

Collecting sunlight using these tiny colloidal quantum dots depends on two types of semiconductors: n-type which are rich in electrons;

#New method stabilizes common semiconductors for solar fuels generation Researchers around the world are trying to develop solar-driven generators that can split water yielding hydrogen gas that could be used as clean fuel.

Semiconductors like silicon and gallium arsenide are excellent light absorberss is clear from their widespread use in solar panels.

Now Caltech researchers at the Joint Center for Artificial Photosynthesis (JCAP) have devised a method for protecting these common semiconductors from corrosion even as the materials continue to absorb light efficiently.

and now these technologically important semiconductors are back on the table. The research led by Shu Hu a postdoctoral scholar in chemistry at Caltech appears in the May 30 issue of the journal Science.

and numerous techniques for coating the common light-absorbing semiconductors. The problem has been that if the protective layer is too thin the aqueous solution penetrates through

and corrodes the semiconductor. If on the other hand the layer is too thick it prevents corrosion but also blocks the semiconductor from absorbing light and keeps electrons from passing through to reach the catalyst that drives the reaction.

At Caltech the researchers used a process called atomic layer deposition to form a layer of titanium dioxide (Tio2) material found in white paint and many toothpastes and sunscreensn single crystals of silicon gallium arsenide

what was needed for this solar fuel generator application Deposited as a film ranging in thickness between 4 and 143 nanometers the Tio2 remained optically transparent on the semiconductor crystalsllowing them to absorb lightnd protected them from corrosion

if applied using an inexpensive less-controlled application technique such as painting or spraying the Tio2 onto a semiconductor.

Also thus far the Caltech team has tested only the coated semiconductors for a few hundred hours of continuous illumination.

< Back - Next >

Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011