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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">26733</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2020-21-4-271-280</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Multijunction solar arrays for space and terrestrial applications</article-title><trans-title-group xml:lang="ru"><trans-title>Каскадные солнечные батареи космического и наземного применения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Andreev</surname><given-names>Viacheslav M.</given-names></name><name xml:lang="ru"><surname>Андреев</surname><given-names>Вячеслав Михайлович</given-names></name></name-alternatives><bio xml:lang="en"><p>Head of the Photovoltaics Laboratory of the Ioffe Institute, Corresponding Member of the Russian Academy of Sciences, Doctor of Technical Sciences, Professor</p></bio><bio xml:lang="ru"><p>заведующий лабораторией фотоэлектрических преобразователей ФТИ имени А.Ф. Иоффе, член-корреспондент РАН, д. т. н., профессор</p></bio><email>vmandreev@mail.ioffe.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ioffe Institute</institution></aff><aff><institution xml:lang="ru">Физико-технический институт имени А.Ф. Иоффе Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>21</volume><issue>4</issue><issue-title xml:lang="en">100th anniversary of the GOELRO plan</issue-title><issue-title xml:lang="ru">100-летие плана ГОЭЛРО</issue-title><fpage>271</fpage><lpage>280</lpage><history><date date-type="received" iso-8601-date="2021-06-19"><day>19</day><month>06</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Andreev V.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Андреев В.М.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Andreev V.M.</copyright-holder><copyright-holder xml:lang="ru">Андреев В.М.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/26733">https://journals.rudn.ru/engineering-researches/article/view/26733</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Photovoltaic conversion of the solar energy is the most prospective direction of the renewable power engineering. Solar arrays ensure power supply of spacecrafts and are gaining increasingly more application on the Earth. In the majority of developed countries, laws on state support of the “green” power engineering assisted in a substantial increase of power of the solar photovoltaic systems have been adopted. The main barrier to increasing the terrestrial solar photovoltaics development rates is a relatively high cost of the “solar” electric power. The ways for reducing the cost are the rise of the efficiency of power systems and the reduction of the material consumption for arrays based on multijunction solar cells. Results of multijunction solar cells and modules developments for space and terrestrial solar arrays are discussed in the article. In the last years, a significant experience on creation of multijunction solar cells was accumulated. Cascade solar cells and solar photovoltaic installations on their base with sunlight concentrators have been developed. At present, the terrestrial cascade solar cell efficiency exceeds 45%, which is substantially higher than that in conventional Si and thin-film solar arrays. The cascade solar cell efficiency increase has been achieved at the expense of “splitting” the sunlight spectrum into several intervals by the solar cell semiconductor structure fulfilling more effective photon energy conversion of each of these intervals in a definite parts of this structure. It is shown that multijunction solar cells provide the highest efficiency and they are the basic components of space arrays. Multijunction solar cells provide the highest conversion efficiency of concentrated sunlight as well. It opens prospects for decreasing the solar cell area and cost proportionally to the sunlight concentration. Developed concentrated photovoltaic installations are promising for wide applications in the high scale terrestrial solar photovoltaic energetics.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Фотоэлектрическое преобразование солнечной энергии - наиболее многообещающее направление возобновляемой энергетики. Солнечные батареи обеспечивают энергопитанием космические аппараты и получают все большее применение на Земле. Основным барьером в увеличении темпов развития наземной солнечной фотоэнергетики является относительно высокая стоимость солнечной электроэнергии. Снизить ее можно путем повышения КПД энергосистем и уменьшения расхода материалов для батарей на основе каскадных солнечных элементов. Результаты разработок каскадных солнечных элементов и модулей для солнечных батарей космического базирования и наземных солнечных фотоэнергоустановок на основе каскадных солнечных элементов с концентраторами солнечного излучения показали, что КПД концентраторных каскадных фотопреобразователей превышает 45 % в наземных условиях - это значительно выше, чем в существующих кремниевых и тонкопленочных солнечных батареях. Увеличение КПД каскадных фотопреобразователей достигнуто за счет «расщепления» солнечного излучения на несколько спектральных интервалов и осуществления более эффективного преобразования энергии фотонов каждого из этих интервалов в определенной части полупроводниковой структуры. Каскадные фотоэлектрические преобразователи имеют наивысшее значение КПД и являются основным элементом современных космических солнечных батарей. Каскадные солнечные элементы обеспечивают высокоэффективное преобразование концентрированного солнечного излучения и снижение площади и стоимости солнечных элементов пропорционально кратности концентрирования. Таким образом, использование разработанных концентраторных фотоэнергоустановок в крупномасштабной наземной солнечной фотоэнергетике весьма перспективно.</p></trans-abstract><kwd-group xml:lang="en"><kwd>cascade solar cells</kwd><kwd>space arrays</kwd><kwd>concentrated sunlight</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>каскадный солнечный элемент</kwd><kwd>космические батареи</kwd><kwd>концентрирование солнечного излучения</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Andreev VM, Grilikhes VA, Rumyantsev VD. Photovoltaic Conversion of Concentrated Sunlight. New York: John Wiley &amp; Sons; 1997.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Luque A, Andreev V. (eds.) 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