Sentences with phrase «quantum efficiency»

They found an average quantum efficiency of approximately 30 per cent — very close to that of human rod cells estimated from behavioral experiments.

But by building on the basic step of achieving such high quantum efficiency for solar hydrogen generation, we could make the process of producing a «green» fuel much greener as well.»

We report single - and tandem - waveguide organic solar concentrators with quantum efficiencies exceeding 50 % and projected power conversion efficiencies as high as 6.8 %.

SPARCS will also advance UV detector technology by flying high quantum efficiency, UV - optimized detectors developed at JPL.

Essentially, they created what is known as a quantum dot photoelectrochemical cell that catalytically achieved quantum efficiency for hydrogen gas production exceeding 100 % — in the case of their experiments an efficiency approaching 114 %.

The certified external quantum efficiency of 96 % at 300nm wavelength demonstrates that the increased surface recombination problem no longer exists and for the first time the black silicon is not limiting the final energy conversion efficiency.

The reflectance may also be monitored during the IPCE measurement to calculate wavelength - dependent internal quantum efficiency.

These residuals are similar in shape to the WFC flat field «donut» pattern, in which the detector quantum efficiency tracks the thickness of the two WFC chips.

The phosphor's main limitation is its less than ideal quantum efficiency — how efficiently it converts incoming light to light of a different color — of about 32 percent.

Now we are working on optimizing the material to improve quantum efficiency,» Ong said.

Although many scientists worldwide are engaged in efforts to achieve quantum efficiency as close as possible to 100 % for solar hydrogen production, Yan's achievement in directly exceeding this threshold is a significant fundamental breakthrough.

They excel in a property called the photoluminescence quantum efficiency, which is key to maximizing the efficiency of solar cells.

The synthesized carbon doped SnS2 photocatalyst shows selective photocatalytic CO2 reduction to acetaldehyde with moderately high photochemical quantum efficiency (QE - 0.7 %) under visible - light irradiation [3].

In a traditional LSM the detector is a photomultiplier tube which can register the signal from only one point of light (pixel) at a time and with a typical quantum efficiency of 40 - 50 %.

The origin of the open - circuit voltage is discussed based on the reciprocity relation between electroluminescence and photovoltaic quantum efficiency.

In - band quantum efficiency for the NA detector (i.e., between 500 - 900 nm) is better than 35 %, for the WA red detectors (575 - 625 nm) better than 35 %, and for the WA blue detectors (400 - 450 nm) better than 10 %.

As a consequence, high molar excitation coefficient (EC) and low quantum efficiency (QE) yield higher signal to noise ratios and is an advantage in photoacoustic imaging.

Through photosynthesis, plants operate at nearly 100 percent quantum efficiency, meaning that for almost every photon of sunlight that's absorbed, they produce an equal number of electrons, so it's no surprise that for years scientists have been trying to either mimic that process through creating artificial leaves or have found ways to tap plants themselves as energy sources.

High spontaneous emission quantum efficiency, is important for photon number squeezed light, diode lasers, single ‐ mode light ‐ emitting ‐ diodes, optical interconnects, and solar cells.»

Thus powered, the bacteria can produce acetic acid from CO2 and water, at «quantum efficiencies above 80 %.»

PSCs produced in this way showed enhanced power conversion efficiency (PCE)(from 7.53 to 8.31 %) and internal quantum efficiency (IQE)(from 91 to 99 % at 460 nm).

The total measured detection efficiency including the sky, telescope and fiber transmission losses, the instrument and iodine transmission losses and detector quantum efficiency is 3.4 % under 1.5 arcsec seeing conditions, which is comparable to all of the echelle spectrometers for planet detection.

The architect of the first scientific - grade EMCCD, Photometrics maintains its leadership role with the release of its award - winning Prime 95B, the Scientific CMOS with 95 % quantum efficiency for super-resolution microscopy, and the Iris 15 CMOS with a large field of view for light sheet microscopy.

That means little light is lost and the quantum efficiency is virtually very high.

The new light source could be further used to investigate how the quantum efficiency varies with wavelength, since it is easy to vary the wavelength of the generated single photons.

Krivitsky notes that rod - cell efficiency is comparable to the quantum efficiencies of state - of - the - art human - made single - photon detectors such as photomultipliers (40 per cent) and avalanche photodiodes (50 per cent); remarkably, rod cells occupy an area of only 5 by 50 micrometers and contain their own power supply.

In an SDC the detector is a CCD camera which can register the signal from a quarter million or million pixels simultaneously with a quantum efficiency of upwards of 90 %.

Development work also resulted in devices with thinner polysilicon layers than used in Ford's standard process, increasing their quantum efficiency in the blue (400 to 450 nm).

These Delta - doped detectors have a long history of deployment demonstrating greater than five times the quantum efficiency of the detectors used by GALEX.

«Despite the early days in the raw materials manufacture, the quantum efficiency (photons emitted per electron injected) is already comparable to organic LEDs.»