Solar cells new approaches (19 resultados)

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Taschenbuch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The objective of this study is to investigate new approaches that may overcome the issuesof phase separation and high dislocation density in InxGa1-xN materials with high indiumconcentration, for the realization of high efficiency InxGa1-xN based solar cells.Two novel approaches are proposed that may overcome the basic challenges involvedin the InxGa1-xN heterojunction solar cells. The first approach consists in the growthof a thick multi-layered InGaN/GaN absorber, called Semibuk approach. These GaNinterlayers need to be thick enough to be effective and thin enough to allow carrier trans-port through tunneling. The InxGa1-xN layers need to be thick and numerous enoughto absorb efficiently the incoming light beam, and thin enough to remain fully strainedand without phase separation. The second approach consists in the growth of InxGa1-xNnano-structures for the achievement of high indium content thick InxGa1-xN layers. Itallows the elimination of the preexisting dislocations in the underlying template. It alsoallows strain relaxation of InxGa1-xN layers without any dislocations, leading to higherindium incorporation and reduced piezoelectric effect.The objective of this study is to investigate new approaches that may overcome the issuesof phase separation and high dislocation density in InxGa1-xN materials with high indiumconcentration, for the realization of high efficiency InxGa1-xN based solar cells.Two novel approaches are proposed that may overcome the basic challenges involvedin the InxGa1-xN heterojunction solar cells. The first approach consists in the growthof a thick multi-layered InGaN/GaN absorber, called Semibuk approach. These GaNinterlayers need to be thick enough to be effective and thin enough to allow carrier trans-port through tunneling. The InxGa1-xN layers need to be thick and numerous enoughto absorb efficiently the incoming light beam, and thin enough to remain fully strainedand without phase separation. The second approach consists in the growth of InxGa1-xNnano-structures for the achievement of high indium content thick InxGa1-xN layers. Itallows the elimination of the preexisting dislocations in the underlying template. It alsoallows strain relaxation of InxGa1-xN layers without any dislocations, leading to higherindium incorporation and reduced piezoelectric effect.…

Buch. Condición: Neu. Solar Cells | New Approaches and Reviews | Leonid A. Kosyachenko | Buch | 398 S. | Englisch | 2015 | IntechOpen | EAN 9789535121848 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu Print on Demand.…

Buch. Condición: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - This book contains chapters in which the problems of modern photovoltaics are considered. The majority of the chapters provide an overview of the results of research and development of different types of solar cells. Such chapters are completed by a justification for a new solar cell structure and technology. Of course, highly effective solar energy conversion is impossible without an in-depth examination of the solar cell components as physical materials. The relations between structural, thermodynamic, and optical properties of the physical material without addressing the band theory of solids are of both theoretical and practical interest. Requirements formulated for the material are also to be used for maximally efficient conversion of solar radiation into useful work.…