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
High levels of MEG in GeX QDs and higher QYs than in bulk GeX were subsequently observed in these structures , with external quantum efficiency
exceeding 120% for PbTe QDs .
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.
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.