Searched for: author:"Dorenbos, P."
(1 - 20 of 92)

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Zhou, Rongfu (author), Lin, Litian (author), Liu, Chunmeng (author), Dorenbos, P. (author), Tao, Ye (author), Huang, Yan (author), Liang, Hongbin (author)

A series of Ln-doped KSrPO4 (Ln = Ce3+, Eu3+, Eu2+, Pr3+) phosphors are prepared through a high-temperature solid-state method. The KSrPO4 compound is confirmed to possess a β-K2SO4 structure with the Pnma group by Rietveld refinement, and the temperature...

journal article 2018
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Lyu, T. (author), Dorenbos, P. (author)

The vacuum referred binding energy (VRBE)-guided design of Bi3+-based storage and afterglow materials together with charge carrier trapping processes is explored with a study on bismuth- and lanthanide-doped rare earth ortho-phosphates. By combining Bi3+ with the shallow hole trap of Tb3+ or Pr3+,...

journal article 2018
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Dorenbos, P. (author)

Electronic level schemes with the host valence and conduction band together with the level locations of ground and excited states of defects are used to explain and predict luminescence and carrier trapping phenomena. These schemes are always constructed and interpreted by using the electron picture. In this work the alternative hole picture...

journal article 2018
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Luo, H. (author), Dorenbos, P. (author)

Trivalent Nd, Dy, Ho, Er, Tm, Sm and Eu usually act as electron trapping centers in wide band gap compounds, whereas trivalent Ce, Tb and Pr act as hole trapping centers. When a deep electron trap is combined with a shallow hole trap, then during the thermoluminescence glow the hole is released, generating recombination luminescence at the...

journal article 2018
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Lyu, T. (author), Dorenbos, P. (author)
Various methods for deliberate design electron and hole trapping materials are explored with a study on double lanthanide doped rare earth ortho phosphates. Cerium acts as recombination center while lanthanide codopants as electron trapping centers in LaPO4:0.005Ce3+,0.005Ln3+. The electron trap depth generated by lanthanide codopants can be...
journal article 2017
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Katayama, Y. (author), Kayumi, T. (author), Ueda, J. (author), Dorenbos, P. (author), Viana, B (author), Tanabe, S (author)
In this paper, Mn2+ and Ln3+ (Ln = Eu, Yb) co-doped MgGeO3 phosphors were prepared using a solid state reaction technique, and their optical properties were investigated. Mn2+-doped samples exhibit persistent luminescence in the red region, peaking at 677 nm, because of the 4T1 → 6A1 transition of the Mn2+ ions under ultraviolet (UV) excitation....
journal article 2017
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Awater, R.H.P. (author), Dorenbos, P. (author)

This paper provides an overview and interpretation of the spectroscopic data of the Bi3+ activator ion in 117 different inorganic compounds. The energies of the metal-to-metal charge transfer and the interconfigurational transitions of Bi3+ were collected from the archival literature. Using these energies, in combination...

review 2017
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Ueda, J. (author), Meijerink, Andries (author), Dorenbos, P. (author), Bos, A.J.J. (author), Tanabe, Setsuhisa (author)

We investigated thermally activated ionization and thermally activated crossover as the two possibilities of quenching of 5d luminescence in Pr3+-doped Y3Al5-xGaxO12. Varying the Ga content x gives the control over the relative energy level location of the 5d and 4f2:PJ3 states of Pr3+ and the host conduction band (CB). Temperature-dependent...

journal article 2017
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Ueda, J. (author), Hashimoto, Atsunori (author), Takemura, Shota (author), Ogasawara, Kazuyoshi (author), Dorenbos, P. (author), Tanabe, Setsuhisa (author)

The Y3Al5−xGaxO12(YAGG):Ce3+-Cr3+ persistent phosphor is one of the materials in which Cr3+ ions act as electron traps. The possibility of electron traps by other transition metal ions (TM3+, TM = Sc, Ti, V, Cr, Fe) was investigated and those electron trap...

journal article 2017
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Budde, B (author), Luo, H. (author), Dorenbos, P. (author), van der Kolk, E. (author)

In this work it is shown that CaZnOS:Eu2+ has no Eu2+ emission even at low temperature. The observed and earlier reported red emission originates from a CaS:Eu2+ impurity phase. By means of washing the as-prepared samples with diluted nitride acid, we were able to remove the CaS impurity phase and study the...

journal article 2017
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Luo, H. (author), Bos, A.J.J. (author), Dorenbos, P. (author)
Two different charge carrier trapping processes have been investigated in RE2O2S:Ln3+ (RE = La, Gd, Y, and Lu; Ln = Ce, Pr, and Tb) and RE2O2S:M (M = Ti4+ and Eu3+). Cerium, praseodymium and terbium act as recombination centers and hole trapping centers while host intrinsic defects provide the electron trap. The captured electrons released from...
journal article 2017
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Dobrowolska, A.P. (author), Dierre, B.F.P.R. (author), Fang, C.M. (author), Hintzen, H.T.J.M. (author), Dorenbos, P. (author)
Structural and optical properties of MGa2S4 (M = Mg, Zn, Ca, Sr, Ba) compounds have been compared, and the vacuum referred binding energy (VRBE) schemes were constructed for the lanthanide ions in the iso-structural compounds CaGa2S4 and SrGa2S4 employing literature data. The VRBE of an electron in the 5d excited state of Eu2+ was found at 0.75...
journal article 2016
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Rogers, E.G. (author), Dorenbos, P. (author)
The vacuum referred binding energy (VRBE) of the single electron in the lowest energy 3d level of Sc2 +, V4 +, Cr5 +, the lowest 4d level of Y2 +, Zr3 +, Nb4 +, Mo5 + and the lowest 5d level of Ta4 +, and W5 + in various compounds are determined by means of the chemical shift model. They will be compared with the VRBE in the already established...
journal article 2014
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Ter Weele, D.N. (author), Schaart, D.R. (author), Dorenbos, P. (author)
journal article 2014
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Dorenbos, P. (author), Rogers, E.G. (author)
The electronic level schemes for divalent and trivalent lanthanide ions in rare earth (La, Gd, Y, Lu, Sc) vanadate, niobate, tantalate, and in alkaline earth (Ba, Sr, Ca, Mg) titanate, molybdate, and tungstate compounds are presented. Use is made of data from luminescence excitation and absorption spectra of lanthanide (mostly Eu3 +, Pr3 +, and...
journal article 2014
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Drozdowski, W. (author), Brylew, K. (author), Wojtowicz, A.J. (author), Kisielewski, J. (author), Swirkowicz, M. (author), Lukasiewicz, T. (author), De Haas, J.T.M. (author), Dorenbos, P. (author)
(LuxY1-x)3Al5O12:Pr (x = 0.25, 0.50, 0.75) crystals have been grown by the Czochralski method and their scintillation properties have been examined. Compared to the well-respected LuAG:Pr scintillator, which has so extensively been studied in the recent years, the new mixed LuYAG:Pr crystals display markedly higher light yields, regardless of...
journal article 2014
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Dorenbos, P. (author)
The vacuum referred binding energy of electrons in the 4fn levels for all divalent and trivalent lanthanide impurity states in TiO2, ZnO, SnO2, and related compounds MTiO3 and MSnO3 (M = Ca2 +, Sr2 +, Ba2 +) and Ca2SnO4 are presented. They are obtained by collecting data from the literature on the spectroscopy of lanthanide ions, and by...
journal article 2013
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Khodyuk, I.V. (author), Quarati, F.G.A. (author), Alekhin, M.S. (author), Dorenbos, P. (author)
The scintillation response of LaBr3:Ce scintillation crystals was studied as function of temperature and Ce concentration with synchrotron X-rays between 9?keV and 100?keV. The results were analyzed using the theory of carrier transport in wide band gap semiconductors to gain new insights into charge carrier generation, diffusion, and capture...
journal article 2013
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Alekhin, M.S. (author), Biner, D.A. (author), Krämer, K.W. (author), Dorenbos, P. (author)
This paper reports on the effects of Liþ, Naþ, Mg2þ, Ca2þ, Sr2þ, and Ba2þ co-doping on the scintillation properties of LaBr3:5%Ce3þ. Pulse-height spectra of various gamma and X-ray sources with energies from 8 keV to 1.33 MeV were measured from which the values of light yield and energy resolution were derived. Sr2þ and Ca2þ co-doped crystals...
journal article 2013
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Alekhin, M.S. (author), De Haas, J.T.M. (author), Khodyuk, I.V. (author), Krämer, K.W. (author), Menge, P.R. (author), Ouspenski, V. (author), Dorenbos, P. (author)
Commercially available LaBr3:5% Ce3+ scintillators show with photomultiplier tube readout about 2.7% energy resolution for the detection of 662?keV ?-rays. Here we will show that by co-doping LaBr3:Ce3+ with Sr2+ or Ca2+ the resolution is improved to 2.0%. Such an improvement is attributed to a strong reduction of the scintillation light losses...
journal article 2013
Searched for: author:"Dorenbos, P."
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