4 research outputs found

    IPO: An Inclined Planes System Optimization Algorithm

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    In the last decades, heuristic algorithms are widely used in solving problems in different fields of science and engineering. Most of these methods are inspired by natural phenomena, such as biological behaviours or physical principles. In this paper, a new optimization method based on the dynamic of sliding motion along a frictionless inclined plane is introduced. In the proposed algorithm, a collection of agents cooperate with each other and move toward better positions in the search space by employing Newton's second law and equations of motion. Our method is compared with other popular optimization algorithms and the results on 23 standard benchmark functions show its effectiveness in most cases

    Investigation of metal-nickel oxide contacts used for perovskite solar cell

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    Perovskite solar cells (PSCs) have been able to raise new hopes for a revolution in solar cell technology. However, there are many challenges which need to be resolved in order to reveal the true potential of this technology. An issue which should be addressed in designing PSCs is the metal-hole transporting material (HTM) contact’s property. One of the most promising inorganic HTMs for PSCs is Nickel oxide. Although NiO has been extensively studied in the literature, to the best of our knowledge metal-NiO junctions have never been studied experimentally. In this work, metal-NiO contacts have been investigated to indicate a novel route to choose proper metals in designing PSCs based on NiO as the HTM. Thus, NiO layers with four various metals have been fabricated and comprehensively explored. The contacts have been characterized using the transmission line method (TLM), and a contact resistivity ranging from about 2052 to 34 mΩ⋅cm2 was observed. I-V characteristics showed ohmic behavior in all metal-NiO cases. These results indicate that Fermi level pinning occurs at the valence band edge of the NiO. Further discussions resulted in suggesting Nickel as the most applicable candidate on NiO have been also included
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