Nonmonotonic behavior of luminescence characteristics of fine-dispersed self-propagating high-temperature synthesized ZnS:Mn depending on size of its particles
| Autor: | A. G. Zhuk, R.V. Kurichka, S.A. Kravchenko, A.V. Gilchuk, Yu. Yu. Bacherikov, S.E. Zelensky, O.B. Okhrimenko |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Fermi level Biophysics 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Space charge Atomic and Molecular Physics and Optics Condensed Matter::Materials Science symbols.namesake Depletion region 0103 physical sciences symbols Particle Charge carrier Photoluminescence excitation Atomic physics 0210 nano-technology Luminescence |
| Zdroj: | Journal of Luminescence. 194:8-14 |
| ISSN: | 0022-2313 |
| Popis: | We performed a comparative analysis of photoluminescence spectra of micro- and meso-fractions of powdery ZnS:Mn obtained by self-propagating high-temperature synthesis. It was found that manganese ions take part in excitation of ZnS self-activated luminescence. From the data on photoluminescence excitation spectra it was established that excitation of emitting Mn ion in ZnS:Mn meso-fraction is realized with participation of sensitizers (MnZn) and without charge carriers excited at interband absorption. This is explained within a model according to which, at particles size smaller than double length of the space charge region, the particle potential barrier becomes lower and Fermi level decreases owing to summation of space charge regions of opposite particle surfaces, i.e., the depletion region extends over the total particle volume. |
| Databáze: | OpenAIRE |
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