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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">mireabulletin</journal-id><journal-title-group><journal-title xml:lang="ru">Russian Technological Journal</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Technological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-3210</issn><issn pub-type="epub">2500-316X</issn><publisher><publisher-name>RTU MIREA</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2500-316X-2022-10-3-56-63</article-id><article-id custom-type="elpub" pub-id-type="custom">mireabulletin-522</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>МИКРО- И НАНОЭЛЕКТРОНИКА. ФИЗИКА КОНДЕНСИРОВАННОГО СОСТОЯНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MICRO- AND NANOELECTRONICS. CONDENSED MATTER PHYSICS</subject></subj-group></article-categories><title-group><article-title>Моделирование зонной структуры двумерных твердых растворов MoxW1−xS2ySe2(1−y)</article-title><trans-title-group xml:lang="en"><trans-title>Modeling of two-dimensional MoxW1−xS2ySe2(1−y) alloy band structure</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9882-8647</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пименов</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Pimenov</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пименов Никита Юрьевич - аспирант кафедры наноэлектроники Института перспективных технологий и индустриального программирования.</p><p>119454, Москва, пр-т Вернадского, д. 78. ResearcherID ABB-2465-2021</p></bio><bio xml:lang="en"><p>Nikita Yu. Pimenov - Postgraduate Student, Department of Nanoelectronics, Institute for Advanced Technologies and Industrial Programming.</p><p>78, Vernadskogo pr., Moscow, 119454. ResearcherID ABB-2465-2021</p></bio><email xlink:type="simple">nikitapimenov13@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9432-860X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лавров</surname><given-names>С. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Lavrov</surname><given-names>S. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лавров Сергей Дмитриевич - кандидат физико-математических наук, доцент, старший научный сотрудник кафедры наноэлектроники Института перспективных технологий и индустриального программирования.</p><p>119454, Москва, пр-т Вернадского, д. 78. Scopus Author ID 55453548100, ResearcherID G-2912-2016</p></bio><bio xml:lang="en"><p>Sergey D. Lavrov - Cand. Sci. (Phys.-Math.), Associate Professor, Senior Researcher, Department of Nanoelectronics, Institute for Advanced Technologies and Industrial Programming.</p><p>78, Vernadskogo pr., Moscow, 119454. Scopus Author ID 55453548100, ResearcherID G-2912-2016</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2126-7404</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кудрявцев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudryavtsev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кудрявцев Андрей Владимирович - кандидат физико-математических наук, доцент, научный сотрудник кафедры наноэлектроники Института перспективных технологий и индустриального программирования.</p><p>119454, Москва, пр-т Вернадского, д. 78. Scopus Author ID 55219889700, ResearcherID O-1457-2016</p></bio><bio xml:lang="en"><p>Andrey V. Kudryavtsev - Cand. Sci. (Phys.-Math.), Associate Professor, Researcher, Department of Nanoelectronics, Institute for Advanced Technologies and Industrial Programming.</p><p>78, Vernadskogo pr., Moscow, 119454. Scopus Author ID 55219889700, ResearcherID O-1457-2016</p></bio><email xlink:type="simple">kudryavcev_a@mirea.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1766-5482</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Авдижиян</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Avdizhiyan</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Авдижиян Артур Юрьевич - кандидат физико-математических наук, младший научный сотрудник кафедры наноэлектроники Института перспективных технологий и индустриального программирования.</p><p>119454, Москва, пр-т Вернадского, д. 78. Scopus Author ID 57200646355, ResearcherID C-2190-201</p></bio><bio xml:lang="en"><p>Artur Yu. Avdizhiyan - Cand. Sci. (Phys.-Math.), Junior Researcher, Department of Nanoelectronics, Institute for Advanced Technologies and Industrial Programming.</p><p>78, Vernadskogo pr., Moscow, 119454. Scopus Author ID 57200646355, ResearcherID C-2190-2018</p></bio><email xlink:type="simple">avdizhiyan@mirea.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МИРЭА – Российский технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA – Russian Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>08</day><month>06</month><year>2022</year></pub-date><volume>10</volume><issue>3</issue><fpage>56</fpage><lpage>63</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пименов Н.Ю., Лавров С.Д., Кудрявцев А.В., Авдижиян А.Ю., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Пименов Н.Ю., Лавров С.Д., Кудрявцев А.В., Авдижиян А.Ю.</copyright-holder><copyright-holder xml:lang="en">Pimenov N.Y., Lavrov S.D., Kudryavtsev A.V., Avdizhiyan A.Y.</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://www.rtj-mirea.ru/jour/article/view/522">https://www.rtj-mirea.ru/jour/article/view/522</self-uri><abstract><sec><title>Цели</title><p>Цели. Благодаря наличию прямозонного перехода с шириной запрещенной зоны, соответствующей видимой и ближней инфракрасной областям спектра, двумерные дихалькогениды переходных металлов (ДПМ) находят применение в различных оптических приложениях. Однако ограниченный набор существующих ДПМ делает область используемого спектрального диапазона дискретной. Наиболее эффективным способом решения этой проблемы является использование двумерных пленок ДПМ на основе многокомпонентных твердых растворов, в состав которых входят три и более различных химических элемента (в то время, как ДПМ состоят из двух). Варьируя их морфологический состав, можно управлять значением ширины запрещенной зоны, и, таким образом, их оптическим спектром поглощения. Так как ширина запрещенной зоны в таких структурах сильно нелинейна по отношению к их химическому составу, это затрудняет подбор необходимой концентрации для достижения равномерного поглощения. В связи с этим целью данной работы является теоретическое определение зависимости ширины запрещенной зоны четырехкомпонентных двумерных твердых растворов MoxW1−xS2ySe2(1−y) от их морфологического состава.</p></sec><sec><title>Методы</title><p>Методы. Расчеты выполнены в рамках теории функционала плотности с использованием программного пакета Quantum Espresso. Двумерные кристаллиты твердых растворов ДПМ были изготовлены из объемных кристаллов ДПМ методикой механической эксфолиации на подложку Si/SiO2. Экспериментальное исследование фотолюминесцентных характеристик было проведено при помощи фотолюминесцентной микроскопии- спектроскопии.</p></sec><sec><title>Результаты</title><p>Результаты. В работе была определена зависимость ширины запрещенной зоны от морфологического состава двумерных твердых растворов MoxW1−xS2ySe2(1−y). Установлено, что при варьировании состава твердых растворов ДПМ ширина запрещенной зоны изменяется от 1.43 до 1.83 эВ. Показано, что полученные теоретические результаты качественно совпадают с экспериментальными данными.</p></sec><sec><title>Выводы</title><p>Выводы. Минимальной шириной запрещенной зоны обладают твердые растворы, близкие по своему составу к MoSe2, в то время как максимальной – структуры, близкие по своему составу к WS2.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objectives</title><p>Objectives. Two-dimensional transition metal dichalcogenides (TMDs) are utilized for various optical applications due to the presence in these materials of a direct band gap corresponding to the visible and near-infrared spectral regions. However, a limited set of existing TMDs makes the region of the used spectral range discrete. The most effective way to solve this problem is to use two-dimensional TMD films based on multicomponent alloys, including three or more different chemical elements (while TMDs consist of two). By varying their morphological composition, one can control the value of the band gap and thus their optical absorption spectrum. However, since the band gap in such structures is highly nonlinear as far as their chemical composition is concerned, it can be challenging to select the required concentration in order to achieve uniform absorption. In this regard, the purpose of this work is to theoretically determine the dependence of the band gap of four-component two-dimensional MoxW1–xS2ySe2(1–y) alloys on their morphological composition.</p></sec><sec><title>Methods</title><p>Methods. The calculations were performed within the framework of the density functional theory using the Quantum Espresso software package. Flakes of two-dimensional TMDs alloys were prepared from bulk TMDs crystals by mechanical exfoliation on a Si/SiO2 substrate. An experimental study of the photoluminescence characteristics was carried out using photoluminescence microscopy-spectroscopy. Results. In this work, the dependence of the band gap on the morphological composition of two-dimensional MoxW1–xS2ySe2(1–y) alloys was determined. Upon varying the composition of TMDs alloys, it was found that the band gap changes from 1.43 to 1.83 eV. The obtained theoretical results are in qualitative agreement with the experimental data.</p></sec><sec><title>Conclusions</title><p>Conclusions. The minimum band gap is observed in alloys close to MoSe2, while alloys close to WS2 have the maximum band gap value.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>дихалькогениды переходных металлов</kwd><kwd>двумерные полупроводники</kwd><kwd>зонная структура</kwd><kwd>запрещенная зона</kwd><kwd>теория функционала плотности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>transition metal dichalcogenides</kwd><kwd>two-dimensional semiconductors</kwd><kwd>band structure</kwd><kwd>band gap</kwd><kwd>density functional theory</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Российского научного фонда (грант № 19-72-10165). Экспериментальные исследования были выполнены с использованием оборудования Центра коллективного пользования РТУ МИРЭА</funding-statement><funding-statement xml:lang="en">This work was supported by the Russian Science Foundation (grant No. 19-72-10165). 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