CHE SIGNIFICA QUANTUM EFFICIENCY IN INGLESE
Efficienza quantistica
Il termine efficienza quantistica può applicarsi al fotone incidente a un rapporto di elettrone convertito, di un dispositivo fotosensibile o può riferirsi all'effetto TMR di una giunzione magnetica tunnel. In un dispositivo accoppiato con carica è la percentuale di fotoni che colpiscono la superficie fotoreattiva del dispositivo che producono carichi di carica. Viene misurato in elettroni per fotone o amplificatori per watt. QE è una misura della sensibilità elettrica di un dispositivo alla luce. Poiché l'energia di un fotone è inversamente proporzionale alla sua lunghezza d'onda, QE viene spesso misurata su un intervallo di diverse lunghezze d'onda per caratterizzare l'efficienza di un dispositivo ad ogni livello di energia fotonica. Il QE per i fotoni con energia sotto il gap della banda è zero. Il film fotografico in genere ha un QE molto inferiore al 10%, mentre i CCD possono avere un QE di ben oltre il 90% a determinate lunghezze d'onda.
definizione di quantum efficiency nel dizionario inglese
La definizione di efficienza quantica nel dizionario è il numero di elettroni rilasciati da una fotocellula per fotone di radiazione incidente di una data energia. Un'altra definizione di efficienza quantica è il numero di specie chimiche che subiscono la reazione per fotone di radiazione assorbita di una data energia.
PAROLE IN INGLESE ASSOCIATE CON «QUANTUM EFFICIENCY»
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10 LIBRI IN INGLESE ASSOCIATI CON «QUANTUM EFFICIENCY»
Scopri l'uso di
quantum efficiency nella seguente selezione bibliografica. Libri associati con
quantum efficiency e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Quantum Efficiency in Complex Systems: From molecular ...
The role of this in molecular aggregates is addressed in the first part of this volume.
Uli Würfel, Michael Thorwart, Eicke R. Weber,
2011
2
Vision: Coding and
Efficiency
How did you come to be interested in quantum efficiency? H. B. Barlow: I was an
undergraduate and doing Part II Physiology [at Cambridge University in the early
1940s]. I was directed to R. A. Fisher's book [1925, Statistical Methods for ...
3
Quantum Efficiency in Complex Systems, Part I: Biomolecular ...
Biomolecular Systems. Semiconductors and Semimetals Quantum Efficiency in
Complex Systems, Part I: Biomolecular systems SEMICONDUCTORS. Series
Editors Eicke R. Weber Director Fraunhofer-Institut f ̈ur Solare Energiesysteme
ISE ...
4
Fundamentals of Infrared Detector Materials
2.1.2 IR detector sensitivity The above discussion indicates the importance of
absorption quantum efficiency in any comparison of IR materials. The lower the
value of absorption quantum efficiency for a specific detector thickness, the lower
the ...
5
Quantum Efficiency as a Device-physics Interpretation Tool ...
Chapter 3 Role of Light Bias in Quantum Efficiency Measurements 3.1
Photoconductivity A photovoltaic device converts the energy of an absorbed
photon into an electron-hole pair which can be used for electrical energy. Not all
absorbed ...
Efficiency Vs Wavelength The wavelength dependence of quantum efficiency in
AlGalnP LEDs is strong and is attributed mainly to fundamental physical
mechanisms within the material system, as described previously. The most
dominant ...
7
Thermodynamic Analysis and Determination of Spontaneous ...
By pumping a semiconductor in the Urbach absorption tail [19], it is possible to
achieve net cooling if the external quantum efficiency, the ratio between the
number of photon emitted into free space and absorbed pumping photon number
, ...
8
Optoelectronics of Solar Cells
[3.3(b)] This photocurrent efficiency is sometimes also called the incident
photocurrent efficiency (IPCE) or the external quantum efficiency. The JSc value
for a typical solar cell can be predicted from the integral of the product of the
absorptivity, ...
9
The Essential Physics of Medical Imaging
10.4 DETECTIVE QUANTUM EFFICIENCY The detective quantum efficiency (
DQE) of an imaging system is a very useful description of an x-ray imaging
system, used by imaging scientists, to describe the overall SNR performance of
the ...
Jerrold T. Bushberg,
2002
The quantum efficiency T| of a photodetector is the number of electron-hole pairs
generated per incident photon collected at the contacts. Quantum efficiency is
determined by many factors. These include the fact that not all photons incident
on ...
10 NOTIZIE DOVE SI INCLUDE IL TERMINE «QUANTUM EFFICIENCY»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
quantum efficiency nel contesto delle seguenti notizie.
An LED with 250% peak quantum efficiency
In an ideal world, every injected electron results in the emission of a photon, giving 100% quantum efficiency. However, the transfer of electrical to optical energy ... «SPIE Newsroom, feb 15»
Striking a balance for better quantum dot LEDs
Quantum dot LEDs (QLEDs) are readily fabricated by solution processing ... As a result they can achieve an external quantum efficiency of 20.5% and ... «nanotechweb.org, ott 14»
Self-organized indium arsenide quantum dots for solar cells
The resulting external quantum efficiency of these solar cell structures in the 900 to 1150 nm wavelength range was higher than devices with the QD layer. «Phys.Org, set 14»
Auger effect identified as main cause of efficiency droop in LEDs
One measure of an LED's emission efficiency is the external quantum efficiency, which is given by ηEQE = ηinjηIQEηext, where ηinj is the efficiency of carrier ... «SPIE Newsroom, giu 14»
World's highest quantum efficiency UV photodetectors developed
Figure 1. Photodetector, grown on sapphire substrate, showed unbiased peak external quantum efficiency of 80 percent, increasing to 89 percent under five ... «Phys.Org, dic 13»
Quantum dot LED approaches theoretical maximum efficiency
The new QLED's external quantum efficiency of 18% more than doubles the current highest value of which the researchers are aware, which is 8%. «Phys.Org, mag 13»
External Quantum Efficiency Above 100% in a Singlet-Exciton …
Solar cell efficiency is limited because light at wavelengths shorter than the cell's absorption threshold does not channel any of its excess energy into the ... «Science Careers Blog, apr 13»
New High-Efficiency Quantum Dot Solar Cells Developed
The first solar cell with an external quantum efficiency (EQE) that exceeds 100 percent for photons with energies in the solar range has been created. With these ... «CleanTechnica, ott 12»
Quantum Efficiency Advances Sensors for Night Vision
In recent years, low-noise CMOS imaging sensors have triggered many new opportunities and applications for the night-vision market. Although low noise is key ... «Photonics.com, giu 12»
e2v CMOS imaging sensors offer >80% quantum efficiency
Ruby CMOS imaging sensors offer a pixel size of 5.3 μm, quantum efficiency >80%, and performance in the near-infrared spectrum (>50% at 850 nm). «Laser Focus world, mar 12»