Publication: Micro- y nanoestructuras de NiO: síntesis, dopado con Sn y aplicaciones tecnológicas en energía y sensado
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2021-02-15
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Universidad Complutense de Madrid
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Abstract
En la presente Tesis doctoral se exponen y discuten los principales resultados obtenidos de la investigación realizada en micro- y nanoestructuras de NiO tanto en estado puro como dopadas con Sn. El NiO es uno de los pocos óxidos semiconductores tipo p de forma intrínseca que existe, en contraste con una gran mayoría de óxidos semiconductores que presentan intrínsecamente carácter tipo n debido a vacantes de oxígeno. En las últimas décadas se está explotando este material debido a su amplia versatilidad en campos de investigación relacionados con dispositivos electrocrómicos, dispositivos magnéticos o dispositivos de almacenamiento de energía como las baterías de ion-litio o los supercapacitores. Además, este óxido destaca por su elevada estabilidad tanto química como térmica, su bajo coste de producción y su baja toxicidad. Mediante el control preciso de los parámetros experimentales se puede llegar a modular las dimensiones y morfologías de este material, reduciendo el tamaño del NiO y abriendo aún más el campo de aplicación. Otra manera de incrementar y/o mejorar sus aplicaciones, es mediante la incorporación de dopantes de forma controlada, modificando de esta manera sus propiedades ópticas, estructurales o magnéticas entre otras...
In this work, the main results obtained from the research carried out on pure and Sn doped NiO micro- and nanostructures, are shown and discussed. NiO is one of the very few intrinsically p-type semiconductor oxides, contrary to the well-known semiconductor oxides, which usually exhibit an intrinsically p-type behaviour due to oxygen vacancies. NiO is being recently exploited, due to its wide versatility in research fields related to electrochromic, magnetic or energy storage devices such as lithium-ion batteries or supercapacitors. Besides, this oxide exhibits high chemical and thermal stability, low production cost and low toxicity. By controlling the experimental parameters from the synthesis, the dimensions and morphologies of the as-grown materials can be tailored, broadening the field of applications of this oxide. Dopant incorporation with a precise control, also leads to increase and/or improve the applications, thereby modifying their optical, structural or magnetic properties, among others...
In this work, the main results obtained from the research carried out on pure and Sn doped NiO micro- and nanostructures, are shown and discussed. NiO is one of the very few intrinsically p-type semiconductor oxides, contrary to the well-known semiconductor oxides, which usually exhibit an intrinsically p-type behaviour due to oxygen vacancies. NiO is being recently exploited, due to its wide versatility in research fields related to electrochromic, magnetic or energy storage devices such as lithium-ion batteries or supercapacitors. Besides, this oxide exhibits high chemical and thermal stability, low production cost and low toxicity. By controlling the experimental parameters from the synthesis, the dimensions and morphologies of the as-grown materials can be tailored, broadening the field of applications of this oxide. Dopant incorporation with a precise control, also leads to increase and/or improve the applications, thereby modifying their optical, structural or magnetic properties, among others...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 20-04-2020