By Antonio L. Luque, Antonio L. Luque, Viacheslav M. Andreev
Photovoltaic solar-energy conversion is among the such a lot promising applied sciences for producing renewable strength, and conversion of focused solar may end up in decreased fee for sun electrical energy. in truth, photovoltaic conversion of focused sun insures a good and reasonable sustainable energy source. This publication supplies an summary of all parts, e.g. cells, concentrators, modules and platforms, for platforms of concentrator photovoltaics. The authors file on major effects regarding layout, expertise, and functions, and in addition disguise the elemental physics and marketplace issues. particular contributions contain: idea and perform of sun concentrators; an outline of concentrator PV actions; an outline of concentrator sun cells; layout and know-how of modules and platforms; production elements; and a industry examine.
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First of all, we proved experimentally the unique injection properties of the wide-gap emitters and superinjection eﬀect , and the stimulated emission . I. M. D. Rumyantsev Fig. 2. Band gap Eg as a function of the lattice constant for Si,Ge, and III-V compounds and their solid solutions. Hatched rectangles correspond to Eg ranges for various materials that provide the highest eﬃciency of solar cells with two and four p-n junctions heterojunction and carefully studied luminescence properties  and diﬀusion of carriers in a graded-band gap heterostructure.
6d). The recombination losses of carriers before their collection by the p-n junction were reduced. At this stage of the optimization of single-junction AlGaAs/GaAs photocell heterostructures, the newly developed MOCVD technique was still competing with the modiﬁed lowtemperature LPE technique. Fig. 6. I. M. D. Rumyantsev Fig. 7. Schematic diagrams of AlGaAs/GaAs single-junction multilayer solar cells. a LPE grown structure with a back potential barrier and thin wide-gap p−AlGaAs window. b MOCVD-grown solar cell structure with an embedded Bragg mirror.
Luque 18. V. Garboushian, D. Roubideaux, S. Yoon. Proc 25th Photovoltaic Specialists Conference (IEEE, New York, 1996), 1373 19. W. Bett, B. Burger, F, Dimroth, G. Siefer, H. Lerchenmüller. High concentration PV using III-V solar cells. Proc 2006 IEEE 4th World Conf Photov Energy Conv 20. R. C. M. A. M. Edmondson, S. S. L. H. A. H. Karam. Proc 20th European Photovoltaic Solar Energy Conf and Exhibition (WIP Munich 2005), 118 21. V. L. Alvarez, J. Alonso, A. Luque, C. Mateos. Proc European PV Solar Conference (WIP, Munich, 2004), 2086 22.