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Study and Analysis of Semiconductors for the Development of Two-layer Solar Cells
Jefry Mora,Jorge Ospina,Darío Amaya 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.11
In the field of renewable energies, researchers have always looked for the improvement of the conversion method in solar cells, due to the fact that only 14% of the electrical potential is being used. That is why in order to increase efficiency, different designs and materials have been studied. One of the most viable ways is the technology of multilayer solar cells, which the recent investigations focused due to the fact this technique allows the possibility of achieving efficiencies above 30%. Despite the above, the problem of this technique is the cost of manufacturing, which compared to the commercial cells, is inferior in benefit - cost relationship. For this reason, this paper shows a study of different semiconductors to design a two-layer solar cell, with the aim of selecting the best combination of semiconductors according to their own characteristics and results according to the described method.
Lopera Alex A.,Bezzon Vinicius D. N.,Ospina Victoria,Higuita-Castro Jorge L.,Ramirez Francisco J.,Ferraz Humberto G.,Orlando Marcos T. A.,Paucar Carlos G.,Robledo Sara M.,Garcia Claudia P. 한국세라믹학회 2023 한국세라믹학회지 Vol.60 No.1
Many efforts in the tissue engineering field have been devoted to producing biomedical devices with several physico-chemical properties that could promote an increase in the quality of therapeutic treatments. Thus, 3D printing is an efficient method which facilitates manufacturing high quality products to be used as medical devices. However, high-performance materials are required for obtaining products that are able to be 3D printed to attend the biomedical concerns. In this work, fused PLA-calcium phosphate-tobramycin-based filaments with antimicrobial properties were produced. X-ray powder diffraction, Fourier transform infrared spectroscopy and thermal analysis were performed to characterize the pure compounds as well as the composite filaments, revealing that the drug is preserved into the filaments by the implemented methodology, even after the hot extrusion procedure. The filaments and the printed pieces presented great antimicrobial effect and a controlled-release profile was also observed by the drug-release assays for the filaments produced, thereby indicating this material as a promising candidate to be used for implantable medical devices in the future.