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  • 1
    Electronic Resource
    Electronic Resource
    Convection in an asymmetrically sourced Z pinch (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 5151-5157 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The convection of a magnetically confined plasma resulting from heat and particle sources is studied. It is assumed that the convection is low-level in that the system stays stable to ideal interchange instabilities. A Z-pinch plasma with asymmetric particle and heat sources is considered. It is found that there is no convection if there are no particle sources, independent of the distribution of the heat sources. Particle sources result in convection which in turn influences heat transport. The central temperature, however, may go up or down in response to this convection, depending on the distribution of the source function. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1413228
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    The band gap of Cu2ZnSnSe4: Effect of order-disorder (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-09-20
    Description: The order-disorder transition in kesterite Cu 2 ZnSnSe 4 (CZTSe), an interesting material for solar cell, has been investigated by spectrophotometry, photoluminescence (PL), and Raman spectroscopy. Like Cu 2 ZnSnS 4 , CZTSe is prone to disorder by Cu-Zn exchanges depending on temperature. Absorption measurements have been used to monitor the changes in band gap energy ( E g ) of solar cell grade thin films as a function of the annealing temperature. We show that ordering can increase E g by 110 meV as compared to fully disordered material. Kinetics simulations show that E g can be used as an order parameter and the critical temperature for the CZTSe order-disorder transition is 200 ± 20 °C. On the one hand, ordering was found to increase the correlation length of the crystal. But on the other hand, except the change in E g , ordering did not influence the PL signal of the CZTSe.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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