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A new superconductor (Na0.25K0.45)Ba3Bi4O12, having an A-site-ordered double perovskite structure, with a maximum Tc∼27K has very recently been discovered through hydrothermal synthesis at 593K. The structural, elastic, electronic, and thermal properties of the new synthesized compound have been investigated theoretically. Here we have employed the pseudo-potential plane-wave (PP-PW) approach based...
InxGa1-xN has been found to be very potential materials for the fabrication of high efficiency multi-junction (MJ) solar cells. The cost of MJ solar cells composing of III-V materials is higher than that of Si solar cells. To resolve the problem of cost is to employ concentrator systems, which concentrate sunlight with a lens, thereby increasing the intensity of sunlight striking the solar cells....
This paper reports the theoretical design and performance of In xGa1-xN-based multijunction solar cells for high efficiency. A simulation model is developed which optimizes the design of MJ solar cells for high efficiency. The efficiency was optimized by optimizing the band gap and thickness of different cells while keeping the current mismatch between different cells below 0.2%. The efficiency is...
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