On the effect of thermodiffusion on solute segregation during the growth of semiconductor materials by the vertical Bridgman method
| Autor: | Séverine Millet, Daniel Henry, Slim Kaddeche, Marcello Lappa, Hamda Ben Hadid, Mokhtar Ben Sassi |
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| Přispěvatelé: | Département de Physique et Instrumentation, Laboratoire MMA, Université de Carthage - University of Carthage-Institut National des Sciences Appliquées et de Technologie - Carthage (INSAT Carthage), Institut National des Sciences Appliquées et de Technologie [Tunis] (INSAT), Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Convection
Convective heat transfer Dopant Grashof number Mineralogy 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Thermophoresis Inorganic Chemistry Crystal 0103 physical sciences Materials Chemistry QD TJ [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] 010306 general physics 0210 nano-technology Intensity (heat transfer) ComputingMilieux_MISCELLANEOUS Directional solidification |
| Zdroj: | Journal of Crystal Growth Journal of Crystal Growth, Elsevier, 2017, 458, pp.154-165. ⟨10.1016/j.jcrysgro.2016.09.043⟩ |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/j.jcrysgro.2016.09.043⟩ |
| Popis: | The effect of thermodiffusion on dopant distribution in the melt and in the grown crystal is investigated numerically for a vertical Bridgman configuration for situations of pure thermal convection corresponding to dilute alloys. The dopant distribution is shown to be significantly affected by the Soret parameter value. The sensitivity of the system to a variety of parameters, including the Grashof number and the so-called furnace residence time, i.e. the time during which the crucible is maintained in the furnace before initiating the solidification process, is assessed by means of parametric simulations. Moreover, the results indicate that variations in the sign of the Soret parameter can lead to diametrically opposite behaviours, while an increase in the intensity of the thermal convection generally leads to a mitigation of the effects induced by thermodiffusion. On the basis of the numerical results some useful criteria are drawn which could help crystal growers to discern the complex interrelations among the various parameters under one’s control (that are not independent of one another) and to elaborate rational guidelines relating to strategies to be used to improve the quality of the resulting crystals. |
| Databáze: | OpenAIRE |
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