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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2019-10-2-190-198</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-640</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="en"><subject>CHEMISTRY AND MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>Synthesis and down-conversion luminescence of Ba4Y3F17:Yb:Pr solid solutions for photonics</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Kuznetsov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov str., Moscow, 119991 </p></bio><email xlink:type="simple">kouznetzovsv@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Nizamutdinov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>18 Kremljovskaya, Kazan, 420008 </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Mayakova</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov str., Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Voronov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov str., Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Madirov</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>18 Kremljovskaya, Kazan, 420008 </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Khadiev</surname><given-names>A. R.</given-names></name></name-alternatives><bio xml:lang="en"><p>18 Kremljovskaya, Kazan, 420008 </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Spassky</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Leninskie Gory, Moscow 119991</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Kamenskikh</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Leninskie Gory, Moscow 119991</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Yapryntsev</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="en"><p>31 Leninsky pr., Moscow,119991</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Ivanov</surname><given-names>V. K.</given-names></name></name-alternatives><bio xml:lang="en"><p>31 Leninsky pr., Moscow,119991</p></bio><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Marisov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>18 Kremljovskaya, Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Semashko</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>18 Kremljovskaya, Kazan, 420008 </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Fedorov</surname><given-names>P. P.</given-names></name></name-alternatives><bio xml:lang="en"><p>38 Vavilov str., Moscow, 119991 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Kazan Federal University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-3"><institution>Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-4"><institution>Physics Faculty of Lomonosov Moscow State University</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-5"><institution>Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>12</day><month>08</month><year>2025</year></pub-date><volume>10</volume><issue>2</issue><fpage>190</fpage><lpage>198</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kuznetsov S.V., Nizamutdinov A.S., Mayakova M.N., Voronov V.V., Madirov E.I., Khadiev A.R., Spassky D.A., Kamenskikh I.A., Yapryntsev A.D., Ivanov V.K., Marisov M.A., Semashko V.V., Fedorov P.P., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Kuznetsov S.V., Nizamutdinov A.S., Mayakova M.N., Voronov V.V., Madirov E.I., Khadiev A.R., Spassky D.A., Kamenskikh I.A., Yapryntsev A.D., Ivanov V.K., Marisov M.A., Semashko V.V., Fedorov P.P.</copyright-holder><copyright-holder xml:lang="en">Kuznetsov S.V., Nizamutdinov A.S., Mayakova M.N., Voronov V.V., Madirov E.I., Khadiev A.R., Spassky D.A., Kamenskikh I.A., Yapryntsev A.D., Ivanov V.K., Marisov M.A., Semashko V.V., Fedorov P.P.</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://nanojournal.ifmo.ru/jour/article/view/640">https://nanojournal.ifmo.ru/jour/article/view/640</self-uri><abstract><p>Single-phase powders of Ba4Y3F17:Yb:Pr solid solutions with an average agglomerate size of 400 nm were synthesized by co-precipitation from aqueous solutions. It was shown that the down-conversion mechanism in the investigated samples was quantum cutting, with one photon absorbed by Pr3+ ions resulting in two photons emitted by Yb3+ ions. At first, overall the external quantum yield of down-conversion luminescence measured appeared to be relatively high, with a maximum value of 2.9 % for the Ba4Y3F17:Pr(0.1 %):Yb(10 %) sample. It makes this compound promising for Si-based solar cells efficiency enhancement.</p></abstract><kwd-group xml:lang="en"><kwd>synthesis</kwd><kwd>down-conversion</kwd><kwd>luminescence</kwd><kwd>solid solutions</kwd><kwd>photonics</kwd><kwd>fluorides</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The study was funded by the Russian Science Foundation (project # 17-73-20352). Authors thank E. V. 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