{"id":907,"date":"2021-09-16T19:57:30","date_gmt":"2021-09-16T11:57:30","guid":{"rendered":"http:\/\/polyhedra.cn\/zh\/?p=907"},"modified":"2023-09-10T21:06:07","modified_gmt":"2023-09-10T13:06:07","slug":"discovery-of-new-narrow%e2%80%90band-phosphors-with-the-ucr4c4%e2%80%90related-type-structure-by-alkali-cation-effect","status":"publish","type":"post","link":"http:\/\/ustb.cc\/zh\/discovery-of-new-narrow%e2%80%90band-phosphors-with-the-ucr4c4%e2%80%90related-type-structure-by-alkali-cation-effect\/","title":{"rendered":"Discovery of New Narrow\u2010Band Phosphors with the UCr4C4\u2010Related Type Structure by Alkali Cation Effect"},"content":{"rendered":"\n<p><a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/adom.201801631\">https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/adom.201801631<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/onlinelibrary.wiley.com\/cms\/asset\/e5cee449-4fe6-4dc2-80e2-96e95f7d5c41\/adom.v7.6.cover.jpg\" alt=\"\" style=\"width:277px;height:364px\" width=\"277\" height=\"364\"\/><\/figure>\n<\/div>\n\n\n<p>Narrow-band luminescence materials used in white light-emitting diodes (WLEDs) have demonstrated a great potential to increase the maximum accessible color gamut, improve the color rendition, or enhance the visual luminous efficacy for illumination and display devices. So far, the discovery of narrow-band rare earth doped phosphors for emerging applications remains challenging owing to the limited systems in use and the broadening effect of 4f\u20135d transition. Here, two narrow-band cyan-emitting phosphors with the UCr<sub>4<\/sub>C<sub>4<\/sub>-related type structure, RbNa<sub>2<\/sub>K(Li<sub>3<\/sub>SiO<sub>4<\/sub>)<sub>4<\/sub>:Eu<sup>2+<\/sup>&nbsp;(RNKLSO:Eu<sup>2+<\/sup>) and CsNa<sub>2<\/sub>K(Li<sub>3<\/sub>SiO<sub>4<\/sub>)<sub>4<\/sub>:Eu<sup>2+<\/sup>&nbsp;(CNKLSO:Eu<sup>2+<\/sup>), are reported. The narrow-band emission results from the highly condensed network and a cube-like site for the activator (Eu<sup>2+<\/sup>). The emission peak assignments are investigated, and the variations of luminescence behavior with compositional changes of alkali cations are elaborated in detail. RNKLSO:8% Eu<sup>2+<\/sup>&nbsp;(95%@250 \u00b0C of the integrated emission intensity at 25 \u00b0C) shows better thermal stability than that of CNKLSO:8% Eu<sup>2+<\/sup>&nbsp;(79%@250 \u00b0C), which can be explained by the thermally activated crossover process represented in the configurational coordinate diagram. The optical properties of the as-fabricated WLEDs are studied and demonstrate potential with tunable properties for the full spectrum phosphor-converted LEDs. These findings in UCr<sub>4<\/sub>C<sub>4<\/sub>-type phases help shedding light on new avenues for fabricating new and totally unexpected narrow-emitting phosphors with versatile applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/adom.20 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-907","post","type-post","status-publish","format-standard","hentry","category-lab_papers_2019"],"_links":{"self":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/907","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\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/comments?post=907"}],"version-history":[{"count":2,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/907\/revisions"}],"predecessor-version":[{"id":2558,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/posts\/907\/revisions\/2558"}],"wp:attachment":[{"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/media?parent=907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/categories?post=907"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ustb.cc\/zh\/wp-json\/wp\/v2\/tags?post=907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}