{"id":10924,"date":"2025-10-16T19:38:55","date_gmt":"2025-10-16T17:38:55","guid":{"rendered":"https:\/\/www.grupotordesillas.net\/blog\/spray-pyrolysis-as-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2\/"},"modified":"2025-10-23T19:58:05","modified_gmt":"2025-10-23T17:58:05","slug":"spray-pyrolysis-as-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2","status":"publish","type":"post","link":"https:\/\/www.grupotordesillas.net\/pt\/blog\/spray-pyrolysis-as-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2\/","title":{"rendered":"Spray pyrolysis as an alternative route to produce thermoelectric layers of NaxCoO2"},"content":{"rendered":"\n<p class=\"has-ast-global-color-5-color has-ast-global-color-1-background-color has-text-color has-background has-link-color wp-elements-9808ff837634a45464f91771292327b5 wp-block-paragraph\">Realizado con la colaboraci\u00f3n del Grupo Tordesillas y la Fundaci\u00f3n Carolina<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"401\" src=\"https:\/\/www.grupotordesillas.net\/wp-content\/uploads\/2025\/10\/spray-pyrolysis-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2.jpg\" alt=\"\" class=\"wp-image-10922\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Abstract<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This study investigates polycrystalline NaxCoO2\u00a0thin films synthesized via spray pyrolysis on glass substrates over a wide compositional range of x. The films were grown using cobalt acetate tetrahydrate and sodium hydroxide as precursors, employing different precursor solution molarities to control the growth dynamics. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The charac- terization of the system was conducted using X-ray Diffraction, Scanning Electron Microscopy, Optical Trans- mittance, and Raman spectroscopy. Raman spectroscopy revealed oxygen in-plane motion modes under specific excitation wavelengths due to optical resonance conditions and identified the films as\u00a0\u03b3-NaxCoO2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The growth of\u00a0\u03b3-NaxCoO2\u00a0phase is favored by a high-molarity synthesis mode followed by an oxygen thermal annealing. At room temperature, films with higher sodium content exhibited decreased Seebeck coefficients and electrical resistivity. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Notably, a maximum power factor of approximately ~3.3\u00a0\u03bcW\/K2m was achieved at\u00a0<em>x\u00a0<\/em>=\u00a00.93. Conversely, films prepared at low-molarities presents Na-content Co3O4\u00a0phases and Seebeck coefficients up to 500\u00a0\u03bcV\/K yet suffer from poor electrical conductivity. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These findings underscore the viability of spray pyrolysis as a scalable method for producing p-type thermoelectric layers such as NaCoO2.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull cta-fundacion-carolina has-ast-global-color-4-background-color has-text-color has-background is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-ac1e65f7 wp-block-group-is-layout-flex\" style=\"color:#000000;margin-top:var(--wp--preset--spacing--20);margin-bottom:var(--wp--preset--spacing--20);padding-top:var(--wp--preset--spacing--60);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--60);padding-left:var(--wp--preset--spacing--50)\">\n<span class=\"dashicons dashicons-download\" style=\"font-size: 50px!important;color: #CCC; width:100%;height: 55px;\"><\/span>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\" style=\"font-size:15px;line-height:1\">Download the study<\/p>\n\n\n\n<p class=\"has-text-align-center has-ast-global-color-7-color has-text-color wp-block-paragraph\" style=\"font-size:25px;line-height:1\"><strong>Download the complete Study<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-horizontal is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-cbcdc57d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-fill\"><a class=\"wp-block-button__link has-text-color has-text-align-center wp-element-button\" href=\"https:\/\/www.dropbox.com\/scl\/fi\/0kvwju2ie93mvuv2gx6oc\/2025-10-Godoy_thermoelectrics_Surfaces_and-Interfaces.pdf?rlkey=mvbjxccgifeuu4jwwlkpk1jcs&amp;st=n8nb4yjg&amp;dl=0\" style=\"border-radius:50px;color:#ffffff\">download<\/a><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Realizado con la colaboraci\u00f3n del Grupo Tordesillas y la Fundaci\u00f3n Carolina Abstract This study investigates polycrystalline NaxCoO2\u00a0thin films synthesized via spray pyrolysis on glass substrates over a wide compositional range of x. The films were grown using cobalt acetate tetrahydrate and sodium hydroxide as precursors, employing different precursor solution molarities to control the growth dynamics. The charac- terization of the system was conducted using X-ray Diffraction, Scanning Electron Microscopy, Optical Trans- mittance, and [&hellip;]<\/p>\n","protected":false},"author":530,"featured_media":10923,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[24],"tags":[307],"class_list":["post-10924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espanhol","tag-grupo-tordesillas-pt-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spray pyrolysis as an alternative route to produce thermoelectric layers of NaxCoO2 | Grupo Tordesillas<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.grupotordesillas.net\/pt\/blog\/spray-pyrolysis-as-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spray pyrolysis as an alternative route to produce thermoelectric layers of NaxCoO2 | Grupo Tordesillas\" \/>\n<meta property=\"og:description\" content=\"Realizado con la colaboraci\u00f3n del Grupo Tordesillas y la Fundaci\u00f3n Carolina Abstract This study investigates polycrystalline NaxCoO2\u00a0thin films synthesized via spray pyrolysis on glass substrates over a wide compositional range of x. The films were grown using cobalt acetate tetrahydrate and sodium hydroxide as precursors, employing different precursor solution molarities to control the growth dynamics. The charac- terization of the system was conducted using X-ray Diffraction, Scanning Electron Microscopy, Optical Trans- mittance, and [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.grupotordesillas.net\/pt\/blog\/spray-pyrolysis-as-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2\/\" \/>\n<meta property=\"og:site_name\" content=\"Grupo Tordesillas\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-16T17:38:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-23T17:58:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.grupotordesillas.net\/wp-content\/uploads\/2025\/10\/spray-pyrolysis-an-alternative-route-to-produce-thermoelectric-layers-of-naxcoo2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"401\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Grupo Tordesillas\" 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