Sentences with phrase «material emits light»

«An optically active bright exciton in this material emits light much faster than in conventional light emitting materials and enables larger power, lower energy use, and faster switching for communication and sensors.»

«This means the material emits light slowly and weakly.»

A good solar cell material emits light very well, so the higher the photoluminescence, the more efficient the solar cell should be.

Not exact matches

Isolated black holes emit no light, but black holes stealing material from orbiting stars will heat that material until it emits X-rays.

The work examines this phenomenon in light - emitting polymer materials.

From the development of the blue laser to high - efficiency, high - brightness, light - emitting devices and new age tailor - made polymers capable of a host of applications in biomedical, chemical, electronics, and opto - electronics, IMRE's research into next - generation materials is likely to catalyze new industries in Singapore

Most of the material in the universe is something called dark matter, mysterious stuff that doesn't emit or reflect light and doesn't interact with what we think of as ordinary matter.

«So if you want a material that will emit pure blue laser light for an LCD screen, instead of going in the laboratory and trying to figure out what combination of gallium, arsenic, aluminum, and three other components would give you the best blue light, you can make thousands of combinations of those components and automatically test each one to see which is the best,» says Johnson.

Some researchers suggested the dark halo consisted of ordinary material that simply didn't emit light.

For example, it was predicted to absorb light in the near - UV and blue region and have high photoluminescence, which is the material's ability to emit light when excited by a higher energy light source.

In cooperation with Dr. Peter Schmidt of Philips Technologie GmbH in Aachen, a team of researchers led by Prof. Dr. Wolfgang Schnick, who holds the Chair of Inorganic Solid - State Chemistry at LMU Munich, has developed a new material for application in light - emitting diodes (LEDs).

The scientists first grew carpets of microscopic wires of gallium nitride, a light - emitting crystalline material, on an ultrathin mesh of graphene, which is a layer of carbon atoms that is flexible, conductive and tough.

And that means the material challenge posed by rare earths won't be solved anytime soon, particularly as more wind farms cover the land, compact fluorescent lightbulbs and light - emitting diodes proliferate, and greater numbers of hybrid or electric vehicles hit the road.

They consist of nanometers - thick layers of light - emitting material, representing the quantum well, sandwiched between other materials that serve to guide both the injected electrical current as well as the output light.

Electrical engineers have enlisted the help of the humble jellyfish in their efforts to develop better light - emitting diodes (LEDs), according to a report published in the December 1 issue of the journal Advanced Materials.

Light - emitting diodes (LEDs) made from semiconductor materials are already used in traffic lights because they last for years and use a fifth of the electricity of normal light bulbs, but they tend to emit blue light that must be converted to white, an inefficient proLight - emitting diodes (LEDs) made from semiconductor materials are already used in traffic lights because they last for years and use a fifth of the electricity of normal light bulbs, but they tend to emit blue light that must be converted to white, an inefficient prolight bulbs, but they tend to emit blue light that must be converted to white, an inefficient prolight that must be converted to white, an inefficient process.

Perovskite materials have shown great promise for use in next - generation solar cells, light - emitting devices (LEDs), sensors, and other applications, but their instability remains a critical limitation.

If light is emitted in a semiconductor, some fraction of this light will never escape the semiconductor material.

Next, the researchers shined a laser on the crystals to measure a property called photoluminescence — the material's ability to emit light when excited by a laser — in different areas of the crystals.

A vast improvement over current nonreflective materials, the new technology could revolutionize solar cells, intensify light - emitting diodes, and possibly help solve mysteries in quantum mechanics by mimicking a «black body,» an object that absorbs all light.

Instead, the researchers are using a plastic material which emits red light when illuminated with green laser light — and the amount of red light it emits is reduced by the presence of explosives.

«Engineers design «living materials»: Hybrid materials combine bacterial cells with nonliving elements that emit light.»

Diodes are composed of two conductive materials, such as silicon or germanium; the light - emitting variety uses materials such as gallium arsenide, which releases photons when electricity flows through it.

Smartphones and tablet computers use organic light - emitting diode (OLED) technology to produce images and manufacturers are experimenting with thinner and flexible material for use in new products — like fabrics or windows.

Although the device has a diode - like structure, its light - emitting system is not based on a diode system, which are made from layers of semiconductors, materials that act like a cross between a conductor and an insulator, the electrical properties of which can be controlled with the addition of impurities called dopants.

In a thermo - photovoltaic device, external heat causes the material to glow, emitting light that is converted into an electric current by an absorbing photovoltaic element.

In a thermo - photovoltaic device, heat from an external source (chemical, solar, etc.) makes a material glow, causing it to emit light that is converted into electricity by a photovoltaic absorber.

Light - emitting organic materials offer brighter and more efficient displays than LEDs.

They light up when electrons in a semiconducting material, having started out in a position of higher energy, get trapped (or «localize») in a position of lower energy and emit the difference as a photon of light.

The nanolasers emit rays in the near - infrared range, but they could shoot light in other frequencies, including the visual spectrum, with alterations to the shape or material.

The new method should reduce the time nano manufacturing firms spend in trial - and - error searches for materials to make electronic devices such as solar cells, organic transistors and organic light - emitting diodes.

Silk continued to adapt the microscope so that it could, like high - end fluorescent microscopes, detect materials such as chlorophyll or fluorescent dyes, which emit light when irradiated with specific light wavelengths.

The spontaneous conversion of excitons (bound electron - hole pairs) to free carriers via these layer - edge states appears to be the key to improving the photovoltaic and light - emitting thin - film layered materials.

A team of MIT researchers has used a novel material that's just a few atoms thick to create devices that can harness or emit light.

In the team's experimental setup, electricity was supplied to a tiny piece of tungsten selenide (small rectangle at center) through two gold wires (from top left and right), causing it to emit light (bright area at center), demonstrating its potential as an LED material.

The color of laser light depends on the light - emitting material.

To limit inherent systematic uncertainties, Ghez's group accounted for overlapping light sources when one star passes in front of another or near the black hole itself, where infalling material emits radiation.

So Yin and his colleagues built a material that does exactly that: reflects visible light, but also emits infrared wavelengths.

The scientists had noticed that when they embedded LEDs in coated textiles or transparent materials, the color of the emitted light would sometimes change.

At the Massachusetts Institute of Technology, research scientist Peter Bermel is seeking a solution using materials that absorb the sun's heat and emit light.

«This could be used to scale current semiconductor technologies down to the atomic scale — lasers, light - emitting diodes (LEDs), computer chips, anything,» says Dr. Linyou Cao, an assistant professor of materials science and engineering at NC State and senior author of a paper on the work.

They used this method to design a new material, a mixture of carbon nanorings and iodine, which conducts electricity and emits white light when exposed to electricity.

The proof - of - concept device, which has been presented today, 3 May, in IOP Publishing's journal Semiconductor Science and Technology, takes advantage of the latest nano - scale materials and processes to emit green and red light separated by a wavelength of 97 nanometres — a significantly larger bandwidth than a traditional semiconductor.

The team's ultimate aim is to make «electroluminescent» materials, which emit light after an electric current has passed through them.

The composite material could be used to build lasers that emit light at any frequency, or to make flat - screen display panels.

«The resulting materials could be useful for making faster transistors that consume less power, or for creating efficient light - emitting devices,» Duan said.

They also predict that the colour of the emitted light should be tunable by changing the molecular structure and / or composition of the material.

The new plasmonic material, can be applied to both polymer light - emitting diodes (PLEDs) and polymer solar cells (PSCs), with world - record high performance, through a simple and cheap process.

Researchers at the U.S. Naval Research Laboratory (NRL) Center for Computational Materials Science, working with an international team of physicists, have revealed that nanocrystals made of cesium lead halide perovskites (CsPbX3), is the first discovered material which the ground exciton state is «bright,» making it an attractive candidate for more efficient solid - state lasers and light emitting diodes (LEDs).

Most semiconducting optoelectronic devices (OEDs), including photodiodes, solar cells, light emitting diodes (LEDs), and semiconductor lasers, are based on inorganic materials.