{"id":34833,"date":"2017-02-23T20:06:06","date_gmt":"2017-02-24T04:06:06","guid":{"rendered":"http:\/\/lifeboat.com\/blog\/2017\/02\/lanthanide-doped-klu2f7-nanoparticles-with-high-upconversion-luminescence-performance-a-comparative-study"},"modified":"2017-06-04T07:11:50","modified_gmt":"2017-06-04T14:11:50","slug":"lanthanide-doped-klu2f7-nanoparticles-with-high-upconversion-luminescence-performance-a-comparative-study","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2017\/02\/lanthanide-doped-klu2f7-nanoparticles-with-high-upconversion-luminescence-performance-a-comparative-study","title":{"rendered":"Lanthanide-Doped KLu2F7 Nanoparticles with High Upconversion Luminescence Performance: A Comparative Study"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/lanthanide-doped-klu2f7-nanoparticles-with-high-upconversion-luminescence-performance-a-comparative-study.jpg\"><\/a><\/p>\n<p>Nice find on nanoparticles and energy transfer \u2014 important in scalable devices, energy conservation, etc.<\/p>\n<hr>\n<p>The development, design and the performance evaluation of rare-earth doped host materials is important for further optical investigation and industrial applications. Herein, we successfully fabricate KLu<sub>2<\/sub>F<sub>7<\/sub> upconversion nanoparticles (UCNPs) through hydrothermal synthesis by controlling the fluorine-to-lanthanide-ion molar ratio. The structural and morphological results show that the samples are orthorhombic-phase hexagonal-prisms UCNPs, with average side length of 80 nm and average thickness of 110 nm. The reaction time dependent crystal growth experiment suggests that the phase transformation is a thermo-dynamical process and the increasing F<sup>\u2212<\/sup>\/Ln<sup>3+<\/sup> ratio favors the formation of the thermo-dynamical stable phase \u2014 orthorhombic KLu<sub>2<\/sub>F<sub>7<\/sub> structure. The upconversion luminescence (UCL) spectra display that the orthorhombic KLu<sub>2<\/sub>F<sub>7<\/sub>:Yb\/Er UCNPs present stronger UCL as much as 280-fold than their cubic counterparts. The UCNPS also display better UCL performance compared with the popular hexagonal-phase NaREF<sub>4<\/sub> (RE = Y, Gd). Our mechanistic investigation, including Judd-Ofelt analysis and time decay behaviors, suggests that the lanthanide tetrad clusters structure at sublattice level accounts for the saturated luminescence and highly efficient UCL in KLu<sub>2<\/sub>F<sub>7<\/sub>:Yb\/Er UCNPs. Our research demonstrates that the orthorhombic KLu<sub>2<\/sub>F<sub>7<\/sub> is a promising host material for UCL and can find potential applications in lasing, photovoltaics and biolabeling techniques.<\/p>\n<p><!-- Link: <a href=\"http:\/\/www.nature.com\/articles\/srep43189\">http:\/\/www.nature.com\/articles\/srep43189<\/a> --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nice find on nanoparticles and energy transfer \u2014 important in scalable devices, energy conservation, etc. The development, design and the performance evaluation of rare-earth doped host materials is important for further optical investigation and industrial applications. Herein, we successfully fabricate KLu2F7 upconversion nanoparticles (UCNPs) through hydrothermal synthesis by controlling the fluorine-to-lanthanide-ion molar ratio. The structural [\u2026]<\/p>\n","protected":false},"author":395,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1497,4],"tags":[],"class_list":["post-34833","post","type-post","status-publish","format-standard","hentry","category-energy","category-nanotechnology"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/34833","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/395"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=34833"}],"version-history":[{"count":3,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/34833\/revisions"}],"predecessor-version":[{"id":58614,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/34833\/revisions\/58614"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=34833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=34833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=34833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}