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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestifm-220</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>КОМПЬЮТЕРНОЕ МОДЕЛИРОВАНИЕ ЭНЕРГЕТИЧЕСКИХ ЗОН И ОПТИЧЕСКИХ ПАРАМЕТРОВ ДИХАЛЬКОГЕНИДОВ ОЛОВА</article-title><trans-title-group xml:lang="en"><trans-title>COMPUTER SIMULATION OF ENERGETIC BANDS AND OPTICAL PARAMETERS OF TIN DICHALCOGENIDES</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шапошников</surname><given-names>В. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaposhnikov</surname><given-names>V, L,</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, старший научный сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Senior researcher</p></bio><email xlink:type="simple">victor.shaposhnikov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кривошеева</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Krivosheeva</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, старший научный сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Senior researcher</p></bio><email xlink:type="simple">anna@nano.bsuir.edu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Борисенко</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Borisenko</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор, заведующий кафедроймикро- и наноэлектроники</p></bio><bio xml:lang="en"><p>Dr. Sc. (Physics and Mathematics), Professor</p></bio><email xlink:type="simple">borisenko@bsuir.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет информатики и радиоэлектроники</institution></aff><aff xml:lang="en"><institution>Belarusian State University of Informatics and Radioelectronics</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>20</day><month>01</month><year>2017</year></pub-date><volume>0</volume><issue>4</issue><fpage>90</fpage><lpage>97</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шапошников В.Л., Кривошеева А.В., Борисенко В.Е., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Шапошников В.Л., Кривошеева А.В., Борисенко В.Е.</copyright-holder><copyright-holder xml:lang="en">Shaposhnikov V.L., Krivosheeva A.V., Borisenko V.E.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/220">https://vestifm.belnauka.by/jour/article/view/220</self-uri><abstract><p>Методами квантово-механического моделирования установлены зонная структура и оптические свойства объема и одного мономолекулярного слоя дихалькогенидов олова – SnS2, SnSe2 и SnTe2. Показано, что первые два соединения в объеме являются непрямозонными полупроводниками, в то время как SnTe2 – бесщелевой полупроводник. При увеличении порядкового номера атома халькогена рассмотренные соединения демонстрируют увеличение постоянных решетки и межатомного расстояния, а также уменьшение ширины запрещенной зоны с 2,4 до 0 эВ. При переходе от объемного материала к одному мономолекулярному слою структурные параметры практически не изменяются; наблюдается пропорциональный рост величины энергетического зазора, в результате чего SnTe2 становится узкозон-ным полупроводником с шириной запрещенной зоны 0,17 эВ. Из исследованных соединений наиболее интересным с точки зрения практического использования является диселенид олова SnSe2 благодаря подходящей для применения в фотовольтаике ширине запрещенной зоны (1,0–1,5 эВ) и значениям коэффициента поглощения вблизи края собственного поглощения более 105 см–1. Также большой интерес представляют тройные растворы замещения, варьирование химического состава которых позволяет изменять в широком диапазоне электронную структуру и оптические свойства материалов.</p></abstract><trans-abstract xml:lang="en"><p>The band structure and optical properties of the bulk and one monolayer of SnS2, SnSe2, and SnTe2 were established by means of ab initio theoretical modeling. The first two bulk compounds were found to be indirect gap semiconductors, while SnTe2 behaves like a gapless semiconductor. As the atomic number of chalcogen is increased, the compounds considered show an increase in lattice constants and interatomic distances, as well as a decrease in the band gap from 2.4 to 0 eV. Upon transition from the bulk material to a single monolayer, the structural parameters remain practically unchanged. There is a proportional increase in the energy gap, whereby SnTe2 becomes a narrow-gap semiconductor with a band gap of 0.17 eV. The most interesting compound according to a practical use is tin diselenide SnSe2 due to the band gap (1.0–1.5 eV) and the absorption coefficient near the absorption edge more than 105 cm‑1 that are appropriate for photovoltaics. Ternary tin dichalcogenides are also of great interest as the variation of the chemical composition of the latter allows modifying the electronic structure and the optical properties in a wide range.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дихалькогениды олова</kwd><kwd>зонная структура</kwd><kwd>ширина запрещенной зоны</kwd><kwd>коэффициент оптического поглощения</kwd><kwd>солнечный элемент</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tin dichalcogenides</kwd><kwd>band structure</kwd><kwd>band gap</kwd><kwd>absorption coefficient</kwd><kwd>solar cell</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">High-efficient low-cost photovoltaics: recent developments / ed. V. Petrova-Koch, R. Hezel, A. Goetzberger. 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