Zobrazeno 1 - 10
of 29
pro vyhledávání: '"J.K Krebs"'
Publikováno v:
Journal of Luminescence. 152:129-132
We present a novel scheme for studying up-conversion through excited state absorption (ESA) by using a broadband excitation source with spectral shaping capabilities. Up-conversion processes have typically been investigated using a single, narrowband
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0a7c4d510ac5c3f072113730a571ec1
https://doi.org/10.1016/j.jlumin.2013.11.069
https://doi.org/10.1016/j.jlumin.2013.11.069
Autor:
C.L. Larochelle, J.K. Krebs
Publikováno v:
Optical Materials. 30:1446-1450
Cerium ion luminescence in crystalline hosts forms the basis of many blue phosphor and scintillator technologies. We report the synthesis of luminescent single crystals of cerium dicyanoargentate. The luminescence properties are characterized using b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c420a297b15f10419f19cc0929ba9e4a
https://doi.org/10.1016/j.optmat.2007.08.007
https://doi.org/10.1016/j.optmat.2007.08.007
Autor:
Uwe Happek, J.K. Krebs
Publikováno v:
Journal of Luminescence. :65-68
The incorporation of rare earth ions into α-Al2O3 is difficult due to the large difference between the rare earth and the Al3+ ionic radii. Recently, rare earth doped α-Al2O3 has been synthesized via the sol–gel technique. In this process, rare e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7ccc5be4661863c099eb6365cb960c6
https://doi.org/10.1016/s0022-2313(01)00407-0
https://doi.org/10.1016/s0022-2313(01)00407-0
Autor:
Z.J. Barninger, J.K. Krebs
Publikováno v:
Journal of Luminescence. 130:1305-1307
As new synthesis techniques are developed to create phosphors with smaller particles the physical processes that govern luminescence behaviors, like efficiency and decay rates, are influenced by the large surface-to-volume ratios of the nano-structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc6675b2af51b9b0c5a7a5751f74d8c3
https://doi.org/10.1016/j.jlumin.2010.02.044
https://doi.org/10.1016/j.jlumin.2010.02.044
Akademický článek
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Publikováno v:
Journal of Alloys and Compounds. :198-206
The optical properties of insulators activated with rare earth ions are determined by the energy levels of the impurity; hence, the study of intra-ion transitions has been the principal focus of numerous investigations in the past. This has occurred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3c9f8c567faa54dd1ab4dad3e286e3e
https://doi.org/10.1016/s0925-8388(00)00630-7
https://doi.org/10.1016/s0925-8388(00)00630-7
Publikováno v:
Journal of Luminescence. :209-213
Sol–gel grown aluminum oxide is a highly porous material composed of a network of nano-crystalline γ-Al2O3 particles. The sol–gel process allows the incorporation of trivalent rare-earth ions into the crystal structure. These ions can be used to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::caa997c1fabb0f04be0736b3b8e57e0f
https://doi.org/10.1016/s0022-2313(99)00100-3
https://doi.org/10.1016/s0022-2313(99)00100-3
Publikováno v:
Journal of Luminescence. 128:780-782
Optical probes of solution-produced glasses yield valuable information about the local structure and dynamics of the host glass systems. We report lifetime results for europium excited states in a series of sol-gel-produced bioactive glasses with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf856f958feceae53a367e5a19866d49
https://doi.org/10.1016/j.jlumin.2007.12.008
https://doi.org/10.1016/j.jlumin.2007.12.008
Autor:
J.K. Krebs, Christopher M. Hobson
Publikováno v:
Materials Letters. 61:4134-4136
The site symmetry of impurity ions greatly influences the energy levels responsible for optical emission. The crystallographic sites that impurities occupy in a host material are largely determined by the ionic radius and charge of the impurity relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c902a0123d7c61a6b219898e3bf27dde
https://doi.org/10.1016/j.matlet.2007.01.063
https://doi.org/10.1016/j.matlet.2007.01.063
Autor:
J.K. Krebs, J.M. Brownstein
Publikováno v:
Journal of Luminescence. 124:257-259
Europium impurity ions have been incorporated into bioactive glass hosts via a sol–gel technique. A series of the bioactive glasses was prepared by varying the calcium to silicon ratio. Trivalent europium impurities were incorporated into the hosts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c3b23b74c1fd9d8088e3650f41443c9
https://doi.org/10.1016/j.jlumin.2006.03.005
https://doi.org/10.1016/j.jlumin.2006.03.005