Composition effect in luminescence properties of Y(NbxTa1-x)O4 mixed crystals
Source abstract
Abstract
Abstract The luminescence properties of Y(NbxTa1-x)O4 mixed crystals were studied. Local structure modifications arise due to the inhomogeneous distribution of the substitutional ions in the mixed crystal and can be traced using the luminescence spectroscopy. In particular, it is shown that the intensity of exciton emission under interband VUV excitation increases for intermediate values of x with the maximum at x = 0.4 relatively to the intensity observed in the constituents of the mixed crystals - YTaO4 and YNbO4. From the luminescence excitation spectra it follows that the probability of exciton creation from the separated e-h pairs increases for intermediate values of x as well. Using numerical simulation it is shown that the effect is connected with the variation of the thermalization length of hot electrons and holes, which is minimal at x = 0.4.
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Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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