Searched for: author%3A%22Luo%2C+H.%22
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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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Luo, H. (author)
In this thesis, two different charge carrier trapping and detrapping processes are<br/>investigated: (1) electron trapping and electron release; (2) hole trapping and hole<br/>release. Both of these two processes can be used to “deliberate design” afterglow<br/>phosphors or storage materials.
doctoral thesis 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:Eu<sup>2+</sup> has no Eu<sup>2+</sup> emission even at low temperature. The observed and earlier reported red emission originates from a CaS:Eu<sup>2+</sup> 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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Luo, H. (author), Ning, Lixin (author), Dong, Yuanyuan (author), bos, A.J.J. (author), Dorenbos, P. (author)
Photoluminescence excitation (PLE) and emission spectra (PL) of undoped (Sr, Ca)<sub>3</sub>(Y, Lu)<sub>2</sub>Ge<sub>3</sub>O<sub>12</sub> as well as Eu<sup>3+</sup>- and Ce<sup>3+</sup>-doped samples have been investigated. The PL spectra show that Eu<sup>3+</sup> enters into both dodecahedral (Ca, Sr) and octahedral (Y, Lu) sites. Ce<sup>3...
journal article 2016
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Accurate simulation of turbulence remains one of the most challenging problems in nuclear reactor analysis and design. Due to limitations in computing resources, Reynolds averaged Navier Stokes models (RANS) continue to play an important role in reactor simulations. The Consortium for advanced simulations of light water reactors (CASL) is a...
conference paper 2015
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Jia, Y. (author), Or, S.W. (author), Chan, H.L.W. (author), Jiao, J. (author), Luo, H. (author), Van der Zwaag, S. (author)
We report a power supply-free, bidirectional electric current-voltage converter based on a coil-wound laminated composite of magnetostrictive alloy and piezoelectric crystal. An electric current applied to the coil induces a magnetic field, resulting in an electric voltage from the composite due to the direct magnetoelectric effect. Conversely,...
journal article 2009
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Jia, Y. (author), Luo, H. (author), Or, S.W. (author), Wang, Y. (author), Chan, H.L.W. (author)
Perovskite oxide Pb(Fe1/2Nb1/2)0.52Ti0.48O3 crystals, which were grown using a modified Bridgman method, show a high low-frequency dielectric constant response at room temperature. The Curie phase transition occurs at 523 K. The characteristic frequency of the dielectric dispersion versus the inverse of temperature obeys an Arrhenius relation,...
journal article 2009
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