News tagged with photoluminescence
Photoluminescence
Photoluminescence (abbreviated as PL) is a process in which a substance absorbs photons (electromagnetic radiation) and then re-radiates photons. Quantum mechanically, this can be described as an excitation to a higher energy state and then a return to a lower energy state accompanied by the emission of a photon. This is one of many forms of luminescence (light emission) and is distinguished by photoexcitation (excitation by photons), hence the prefix photo-. The period between absorption and emission is typically extremely short, in the order of 10 nanoseconds. Under special circumstances, however, this period can be extended into minutes or hours.
For more information about Photoluminescence, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Mn-doped ZnS is unsuitable to act as a dilute magnetic semiconductor
Dilute magnetic semiconductors (DMS) have recently been a major focus of magnetic semiconductor research. A laboratory from the University of Science and Technology of China explored the feasibility of doping ...
Feb 20, 2012 |
5 / 5 (1) |
0
Faster colloidal fluorescence emitters: Nanoplatelets
(PhysOrg.com) -- Significant advances in the application of colloidal structures as light emitters and lasers may soon be realized following the discovery of very fast fluorescence emission rates in colloidal ...
Dec 09, 2011 |
5 / 5 (1) |
0
Breaking Kasha's rule: Scientists find unique luminescence in tetrapod nanocrystals
Observation of a scientific rule being broken can sometimes lead to new knowledge and important applications. Such would seem to be the case when scientists with the U.S. Department of Energy (DOE)'s Lawrence ...
Jul 01, 2011 |
5 / 5 (15) |
0
|
Gold nanoparticles that make leaves glow in the dark
(PhysOrg.com) -- Researchers in Taiwan think they may eventually be able to replace street lamps with trees laced with gold nanoparticles that turn their leaves into bio-light-emitting diodes.
Nanotechnology / Nanomaterials
Oct 25, 2010 |
4.4 / 5 (9) |
11
|
Carbon nanotubes show the ability to amplify light, could lead to new photonic applications
(PhysOrg.com) -- "Carbon nanotubes have a lot of really nice properties that make them good for photonics," Laurent Vivien tells PhysOrg.com. Ever since the discovery that carbon nanotubes have photoluminescence when encaps ...
Jun 23, 2010 |
4.8 / 5 (38) |
0
|
New way to extract light from semiconductors could lead to ultra-high efficiency LEDs
(PhysOrg.com) -- By fabricating ridges coated with silicon dioxide (SiO2) on the surface of a semiconductor, scientists from the National Institute of Advanced Industrial Science and Technology (AIST) in ...
May 14, 2010 |
4.8 / 5 (25) |
8
|
Discovery of Non-blinking Semiconductor Nanocrystals Advances their Applications
(PhysOrg.com) -- Substantial advances for applications of nanocrystals in the fields requiring a continuous output of photons and high quantum efficiency may soon be realized due to discovery of non-blinking semiconductor ...
Nanotechnology / Nanomaterials
May 28, 2009 |
3 / 5 (2) |
3
Discovery of non-blinking semiconductor nanocrystals advances their applications
Substantial advances for applications of nanocrystals in the fields requiring a continuous output of photons and high quantum efficiency may soon be realized due to discovery of non-blinking semiconductor nanocrystals. ...
Nanotechnology / Nanomaterials
May 14, 2009 |
4.8 / 5 (5) |
2
