{"id":1697,"date":"2025-09-01T09:30:13","date_gmt":"2025-09-01T09:30:13","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=1697"},"modified":"2025-09-01T10:31:42","modified_gmt":"2025-09-01T10:31:42","slug":"new-publication-evolution-of-the-structural-and-optical-properties-of-la-doped-silver-niobate-based-thin-films","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=1697","title":{"rendered":"New publication: Evolution of the structural and optical properties of La doped silver niobate-based thin films"},"content":{"rendered":"<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-1698\" src=\"https:\/\/wp.icmm.csic.es\/nanocarma\/wp-content\/uploads\/sites\/38\/2025\/09\/Screenshot_2025-09-01_11-23-38.png\" alt=\"\" width=\"300\"><\/p>\n<p>Y. Mendez-Gonz\u00e1lez, J.D.S. Guerra, F. Agull\u00f3-Rueda, O. Pe\u00f1a\u2010Rodr\u00edguez, A. Fern\u00e1ndez Garc\u00eda, M. Manso Silvan, \u00abEvolution of the structural and optical properties of La doped silver niobate-based thin films,\u00bb <a href=\"https:\/\/doi.org\/10.1016\/j.mseb.2025.118667\">Mater. Sci. Eng. B <strong>323A<\/strong>, 118667 (2025)<\/a>.<\/p>\n<p>A detailed investigation on the structural and optical properties was conducted in lanthanum-substituted Ag(Nb<SUB>0.80<\/SUB>Ta<SUB>0.20<\/SUB>)O<SUB>3<\/SUB> (ALNTx) thin films with La<SUP>3+<\/SUP> concentrations of x = 0, 0.01, 0.02, and 0.03, prepared via chemical solution deposition process. X-ray diffraction confirmed the formation of a polycrystalline perovskite phase (orthorhombic, Pb21m) in all compositions, alongside minor Ag and Ag<SUB>2<\/SUB>O secondary-phases at low La levels. Raman spectroscopy revealed a progressive increase in the active vibrational modes with La doping, reaching up to 19 modes for the compositions with x = 0.02 and 0.03. In particular, the M<SUB>1<\/SUB> band (at 108\u2013110 cm<SUP>-1<\/SUP>) emerges only at these higher dopant levels, along with the progressive appearance of additional modes in the 550\u2013950 cm<SUP>-1<\/SUP> region (identified as M<SUB>13<\/SUB>\u2013M<SUB>19<\/SUB>) as the La-content increases, indicating enhanced local structural distortion and NbO<SUB>6<\/SUB> octahedral tilting. RBS analysis confirmed homogeneous stoichiometry and film thicknesses ranging from 4.4 \u00d7 1017 to 7.0 \u00d7 1017 atoms\/cm<SUP>2<\/SUP>. Optical measurements revealed an indirect bandgap narrowing from 3.50 eV (undoped) to 2.81 eV (x = 0.02), driven by lattice distortion, local bonding changes and reduced Ag\/La\u2013O hybridization. The findings demonstrate that the La doping is an effective strategy for tuning the structural and optical properties of Ag(Nb,Ta)O<SUB>3<\/SUB> thin films, making them attractive for integration into specialized optoelectronic applications, such as functional layers in tandem or multilayer energy devices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Y. Mendez-Gonz\u00e1lez, J.D.S. Guerra, F. Agull\u00f3-Rueda, O. Pe\u00f1a\u2010Rodr\u00edguez, A. Fern\u00e1ndez Garc\u00eda, M. Manso Silvan, \u00abEvolution of the structural and optical properties of La doped silver niobate-based thin films,\u00bb Mater. Sci. Eng. B 323A, 118667 (2025). A detailed investigation on the &hellip; <a href=\"https:\/\/wp.icmm.csic.es\/nanocarma\/?p=1697\">Sigue leyendo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":77,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[10,17,77],"tags":[23,61,28,62,38,41,60],"class_list":["post-1697","post","type-post","status-publish","format-standard","hentry","category-nanocharacterization","category-raman-spectroscopy","category-transition-metal-oxides","tag-article","tag-coating-2","tag-doping","tag-nanocharacterization","tag-oxide","tag-raman-spectroscopy","tag-thin-film"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/users\/77"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1697"}],"version-history":[{"count":6,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1697\/revisions"}],"predecessor-version":[{"id":1704,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=\/wp\/v2\/posts\/1697\/revisions\/1704"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/nanocarma\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}