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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">bsuir</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады БГУИР</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady BGUIR</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7648</issn><issn pub-type="epub">2708-0382</issn><publisher><publisher-name>БГУИР</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35596/1729-7648-2025-23-3-19-25</article-id><article-id custom-type="elpub" pub-id-type="custom">bsuir-4157</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Моделирование оптических процессов в тонкопленочном ИК-светодиоде на основе коллоидных квантовых точек PbS</article-title><trans-title-group xml:lang="en"><trans-title>Modeling of Optical Processes in Thin-Film IR Light-Emitting Diode Based on Colloidal PbS Quantum Dots</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>Туровец</surname><given-names>У. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Turavets</surname><given-names>U. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><sec><title>мл. науч. сотр. науч.-исслед. лаб. интегрированных микро- и наносистем</title></sec></bio><bio xml:lang="en"><sec><title>Turavets U. Ya., Junior Researcher at the R&amp;D Labo- ratory of Integrated Micro- and Nanosystems</title></sec></bio><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>2025</year></pub-date><pub-date pub-type="epub"><day>15</day><month>07</month><year>2025</year></pub-date><volume>23</volume><issue>3</issue><fpage>19</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Туровец У.Е., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Туровец У.Е.</copyright-holder><copyright-holder xml:lang="en">Turavets U.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://doklady.bsuir.by/jour/article/view/4157">https://doklady.bsuir.by/jour/article/view/4157</self-uri><abstract><p>Проведено моделирование оптических процессов в структуре тонкопленочного ИК-светодиода методом конечной разности во временной области. Исследованы такие параметры, как пропускание, эффективность распространения электромагнитных волн в диапазоне 1,2–1,4 мкм. Смоделировано контрольное устройство со слоем оксида индия-олова (ITO) в качестве прозрачного проводящего электрода. Рассмотрена замена слоя ITO на слой оксида олова, легированного фтором (FTO). Установлено, что при такой замене коэффициент пропускания при прохождении ИК-излучением функциональных слоев FTO увеличивается до 70 %, а угловое распределение Е2 – на 10° в сравнении с устройством со слоем ITO. В связи с чем целесообразно заменять слой прозрачного проводящего электрода ITO на слой FTO. </p></abstract><trans-abstract xml:lang="en"><p>The optical processes in the structure of a thin-film IR LED have been simulated using the finite difference method in the time domain. The parameters such as transmission and propagation efficiency of electromagnetic waves in the range of 1.2–1.4 μm have been investigated. A control device with an indium tin oxide (ITO) layer as a transparent conducting electrode has been simulated. The replacement of the ITO layer with a fluorine-doped tin oxide (FTO) layer has been considered. It has been found that with such a replacement, the transmittance of IR radiation passing through the FTO functional layers increases to 70 %, and the angular distribution of E2 increases by 10° compared to a device with an ITO layer. Thus, it is advisable to replace the layer of the transparent conducting ITO electrode with the FTO layer.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>моделирование</kwd><kwd>метод конечной разности во временной области</kwd><kwd>ИК-светодиод</kwd><kwd>напряженность поля</kwd><kwd>пропускание</kwd><kwd>эффективность извлечения света</kwd></kwd-group><kwd-group xml:lang="en"><kwd>modeling</kwd><kwd>finite difference time domain method</kwd><kwd>IR LED</kwd><kwd>field strength</kwd><kwd>transmittance</kwd><kwd>light extraction efficiency.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование проведено при поддержке Белорусского фонда фундаментальных исследований по теме гранта № Т23М-040 «Неорганические инфракрасные светодиоды на коллоидных квантовых точках PbS с улучшенными характеристиками».</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Optical Tunneling to Improve Light Extraction in Quantum Dot and Perovskite Light-Emitting Diodes / G. 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