{"id":69,"date":"2021-03-09T14:55:01","date_gmt":"2021-03-09T06:55:01","guid":{"rendered":"http:\/\/www.ustb.cc\/?p=69"},"modified":"2025-10-28T09:20:27","modified_gmt":"2025-10-28T01:20:27","slug":"highly-efficient-near-infrared-phosphor-lamgga11o19cr3","status":"publish","type":"post","link":"http:\/\/ustb.cc\/zh\/highly-efficient-near-infrared-phosphor-lamgga11o19cr3\/","title":{"rendered":"Highly efficient near-infrared phosphor LaMgGa11O19:Cr3+"},"content":{"rendered":"\n<p><i><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Inorg. Chem. Front., <\/mark>2020,7, 1467-1473<\/strong><\/i>. <a href=\"https:\/\/doi.org\/10.1039\/D0QI00063A\">https:\/\/doi.org\/10.1039\/D0QI00063A<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/pubs.rsc.org\/en\/Image\/Get?imageInfo.ImageType=GA&amp;imageInfo.ImageIdentifier.ManuscriptID=D0QI00063A&amp;imageInfo.ImageIdentifier.Year=2020\" alt=\"\"\/><\/figure>\n<\/div>\n\n\n<p>Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are desirable for in vivo imaging and applications for nondestructive examination in the food industry. Accordingly, it is very important to exploit highly efficient and stable broad-band NIR phosphors. Herein we report a Cr3+-activated LaMgGa11O19 phosphor via a simple solid-state reaction, showing broad-band emission centered at 770 nm with internal\/external quantum efficiency of 82.6%\/42.5%. There are three six-coordinated octahedral crystallographic sites in the structure for Cr3+ occupancy, and changing the Cr3+ concentration can tune the NIR emission with tunable band centers from 715 to 800 nm. This spectral red-shift is mainly ascribed to energy transfer among multiple Cr3+ sites, which is further confirmed by decay lifetime analysis. The phosphor also shows excellent luminescence thermal stability, and the photoluminescence intensity at 410 K maintains 87% of that at room temperature. Our work provides a novel broadband NIR emission phosphor with high efficiency and excellent thermal quenching resistance for the field of NIR spectroscopy <a href=\"https:\/\/www.east-aufblasbar.de\/e131-hupfburg.html\" style=\"color: grey; text-decoration: none;\">h\u00fcpfburg feuerwehr kaufen<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Inorg. Chem. Front., 2020,7, 1467-1473. https:\/\/doi.org [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,7],"tags":[36,77],"class_list":["post-69","post","type-post","status-publish","format-standard","hentry","category-lab_papers_2020","category-recommend","tag-cr3","tag-77"],"_links":{"self":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/69","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/comments?post=69"}],"version-history":[{"count":4,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/69\/revisions"}],"predecessor-version":[{"id":3183,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/69\/revisions\/3183"}],"wp:attachment":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/media?parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/categories?post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/tags?post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}