Thesis /

ROMDOC-THESIS-2017-1022

Contribuţii privind realizarea nanostructurilor fotovoltaice cu eficienţă cuantică optimizată la interacţia cu radiaţia solară

Buga, Mariana
2011-10-07

Abstract: Abstract: The research developed in this doctoral thesis concerns studies on replacement of the silicon substrate to obtain solar cells cheaper and with better quality. Silicon substrate classic and strategic for other areas, but costly in terms of technology, is replaced by non-conventional supports such as nanocomposites glasses, plastic materials Kapton type or metal foil of Ti and stainless steel. CIGS is the basic active element of the structure and represents magnetron target of CuInS2 doped with Ga. The influence of Ga doping concentration is the main factor that may increase the quantum efficiency (Qeff) of the photovoltaic element, up to 17% - 19%. Process "Ion assisted radio frequency magnetron sputtering" is the most reliable and versatile techniques reported to the MBE techniques (molecular beam epitaxy). Chapter 1 provides an overview of the fundamental problems specific to photovoltaic systems, starting from obtaining of photovoltaic cell, obtaining of solar panel and photovoltaic system. Chapter 2 contains a description of photovoltaic nanostructures which includes a classification of solar cells and a description of epitaxial solar cells deposited on silicon support and the description of comparative studies on methods of achieving of nanostructures and multilayer devices for photovoltaic elements. Chapter 3 contains a description of dedicated measurement systems for quantum efficiency and photoelectric performance and presentation of characteristic parameters. Chapter 4 contains the description of technological equipment for execution and process control and measurement equipment. Chapter 5 contains the description of experimental research to replace silicon substrate with a plastic support Kapton type. Chapter 6 contains detailed author’s solutions to achieve these nanostructures such as support material for photovoltaic cell, target material for photovoltaic cell and the photovoltaic cell device. Chapter 7 contains the description of realized measurements and obtained results after analyzing photovoltaic cell device. Chapter 8, named C contains conclusions drawn from elaborate research and author’s contributions.

Keyword(s): Celule fotovoltaice -- Nanostructură -- Teză de doctorat
OPAC: See record in BC-UPB Web OPAC
Full Text: see files

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