quantum efficiency


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quantum efficiency

n
1. (Atomic Physics) physics the number of electrons released by a photocell per photon of incident radiation of a given energy
2. (Chemistry) chem the number of chemical species that undergo reaction per photon of absorbed radiation of a given energy
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By integrating these nanostructures into white OLEDs, an external quantum efficiency of up to 76.3% can be achieved.
The quantum efficiency of PSII ([F.sub.v]/[F.sub.m]) presented significant difference only in the electrical conductivity levels.
Besides, nonradiative processes related to [sup.3][H.sub.5]-[sup.3][F.sub.4] induced by [Tm-Tm] clusters in the crystals could result in strong heat generation and distortions reducing quantum efficiency [16].
High levels of MEG in GeX QDs and higher QYs than in bulk GeX were subsequently observed in these structures [50], with external quantum efficiency exceeding 120% for PbTe QDs [51].
Beard and other NREL scientists in 2011 published a paper in Science that showed for the first time how MEG allowed a solar cell to exceed 100 percent quantum efficiency by producing more electrons in the electrical current than the amount of photons entering the solar cell.
The simulations show that the device has better performance in terms of detector responsivity, gain, and quantum efficiency over various detectors reported so far in the visible-NIR region.
In this case, the ratio of the coincidence count rate to the single count rate was 80%, where the loss at filters and the quantum efficiency of the detectors were compensated.
Features include the S-Vue imaging engine that, according to the company," provides dependable and accurate diagnoses in various conditions with reliably clear images, enhanced sharpness and clarity, and adjustable contrast presets"; a wireless S-Detector with high detective quantum efficiency and a portable grid that displays the patient's body structure clearly and easily without increasing dose; Smart Control, which enables the operator to precisely position the entire system with one touch of the control panel's buttons.
The new detectors offer higher DQE (detective quantum efficiency) to enable improved image quality and lower dose.
Consider an isolated emitter with radiative decay rate [[gamma].sup.0.sub.rad], non-radiative decay rate [[gamma].sup.0.sub.nrad], and define quantum efficiency [[eta].sub.0] = [[gamma].sup.0.sub.rad]/([[gamma].sup.0.sub.rad] + [[gamma].sup.0.sub.nrad]).
We calculate quantum efficiency (QE), the average number of excitons created by a single absorbed photon, in 3D arrays of Si29H36 quantum dots, NWs, and quasi 2D silicon nanofilms, all with both crystalline and amorphous core structures.
The camera has ultra-low etaloning and more than 40% quantum efficiency (QE) at 1000 nm for the NIR version, while the UV-Vis version exhibits a 60% QE at 250 nm.
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