Abstract
It has been found that only three types of emission centers are responsible for bands at 2.69, 2.78 and 2.67 eV in CsI:Eu crystals grown in vacuum. Within the framework of a suggested model a single dipole Eu2+-v c - is responsible for 2.69 eV band, a two-dipole cluster 2(Eu2+-vc -) for 2.78 eV band and a three-dipole cluster 3(Eu2+-vc -) for 2.67 eV band. The emission at 2.69 and 2.67 eV decays exponentially with time constant 0.42 and 0.9 μs, respectively. The decay kinetics of the emission at 2.78 eV has two exponential components with time constant 0.15 and 0.51 μs. It has been experimentally ascertained that the single dipole, two-dipole and three dipole clusters exist at Eu concentration less than 0.01 mass%; from 0.005 to 0.03 mass% and more than 0.03 mass%, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 146-148 |
| Number of pages | 3 |
| Journal | Journal of Luminescence |
| Volume | 144 |
| DOIs | |
| Publication status | Published - 5 Aug 2013 |
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Keywords
- Activator-vacancy dipole
- Decay kinetics
- Europium-doped cesium iodide
- Photoluminescence
ASJC Scopus subject areas
- Biophysics
- Atomic and Molecular Physics, and Optics
- Chemistry(all)
- Biochemistry
- Condensed Matter Physics
Cite this
Spectral-kinetics properties of activator emission centers in CsI : Eu. / Yakovlev, V.; Trefilova, L.; Karnaukhova, A.; Ovcharenko, N.
In: Journal of Luminescence, Vol. 144, 05.08.2013, p. 146-148.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spectral-kinetics properties of activator emission centers in CsI
T2 - Eu
AU - Yakovlev, V.
AU - Trefilova, L.
AU - Karnaukhova, A.
AU - Ovcharenko, N.
PY - 2013/8/5
Y1 - 2013/8/5
N2 - It has been found that only three types of emission centers are responsible for bands at 2.69, 2.78 and 2.67 eV in CsI:Eu crystals grown in vacuum. Within the framework of a suggested model a single dipole Eu2+-v c - is responsible for 2.69 eV band, a two-dipole cluster 2(Eu2+-vc -) for 2.78 eV band and a three-dipole cluster 3(Eu2+-vc -) for 2.67 eV band. The emission at 2.69 and 2.67 eV decays exponentially with time constant 0.42 and 0.9 μs, respectively. The decay kinetics of the emission at 2.78 eV has two exponential components with time constant 0.15 and 0.51 μs. It has been experimentally ascertained that the single dipole, two-dipole and three dipole clusters exist at Eu concentration less than 0.01 mass%; from 0.005 to 0.03 mass% and more than 0.03 mass%, respectively.
AB - It has been found that only three types of emission centers are responsible for bands at 2.69, 2.78 and 2.67 eV in CsI:Eu crystals grown in vacuum. Within the framework of a suggested model a single dipole Eu2+-v c - is responsible for 2.69 eV band, a two-dipole cluster 2(Eu2+-vc -) for 2.78 eV band and a three-dipole cluster 3(Eu2+-vc -) for 2.67 eV band. The emission at 2.69 and 2.67 eV decays exponentially with time constant 0.42 and 0.9 μs, respectively. The decay kinetics of the emission at 2.78 eV has two exponential components with time constant 0.15 and 0.51 μs. It has been experimentally ascertained that the single dipole, two-dipole and three dipole clusters exist at Eu concentration less than 0.01 mass%; from 0.005 to 0.03 mass% and more than 0.03 mass%, respectively.
KW - Activator-vacancy dipole
KW - Decay kinetics
KW - Europium-doped cesium iodide
KW - Photoluminescence
UR - http://www.scopus.com/inward/record.url?scp=84880909101&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880909101&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2013.06.045
DO - 10.1016/j.jlumin.2013.06.045
M3 - Article
AN - SCOPUS:84880909101
VL - 144
SP - 146
EP - 148
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -