(La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er)
Phase-pure (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S upconversion (UC) nanophosphors (average crystallite size ~ 45 nm; RE=Ho, Er) were annealed from their hydrothermally crystallized layered hydroxyl sulfate precursors in flowing hydrogen at 1200 °C for 1 h, with water vapor as the only exhaust. Under 978...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer US
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5570760/ https://www.ncbi.nlm.nih.gov/pubmed/28840548 http://dx.doi.org/10.1186/s11671-017-2277-4 |
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author | Li, Ji-Guang Wang, Xuejiao Liu, Weigang Zhu, Qi Li, Xiaodong Sun, Xudong |
author_facet | Li, Ji-Guang Wang, Xuejiao Liu, Weigang Zhu, Qi Li, Xiaodong Sun, Xudong |
author_sort | Li, Ji-Guang |
collection | PubMed |
description | Phase-pure (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S upconversion (UC) nanophosphors (average crystallite size ~ 45 nm; RE=Ho, Er) were annealed from their hydrothermally crystallized layered hydroxyl sulfate precursors in flowing hydrogen at 1200 °C for 1 h, with water vapor as the only exhaust. Under 978-nm laser excitation (up to 2.0 W), the Ho(3+)-doped phosphor exhibited green (medium), red (weak), and near-infrared (strong) emissions at ~ 546 ((5)F(4) → (5)I(8)), 658 ((5)F(7) → (5)I(8)), and 763 nm ((5)F(4) → (5)I(7)), respectively, and has the stable chromaticity coordinates of about (0.30, 0.66) in the visible-light region (400–700 nm). The Er(3+)-doped UC phosphor, on the other hand, showed weak green (~ 527/549 nm, (2)H(11/2),(4)S(3/2) → (4)I(15/2)), weak red (~668/672 nm, (4)F(9/2) → (4)I(15/2)), and strong near-infrared (~ 807/58 nm, (4)I(9/2) → (4)I(15/2)) luminescence, whose emission color in the visible region drifted from yellowish-green [(0.36, 0.61)] to green [(0.32, 0.64)] with increasing excitation power. Analysis of the power-dependent UC luminescence found three- and two-photon processes for RE=Ho and Er, respectively, and the possible UC mechanisms were proposed. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-017-2277-4) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5570760 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-55707602017-09-11 (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) Li, Ji-Guang Wang, Xuejiao Liu, Weigang Zhu, Qi Li, Xiaodong Sun, Xudong Nanoscale Res Lett Nano Express Phase-pure (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S upconversion (UC) nanophosphors (average crystallite size ~ 45 nm; RE=Ho, Er) were annealed from their hydrothermally crystallized layered hydroxyl sulfate precursors in flowing hydrogen at 1200 °C for 1 h, with water vapor as the only exhaust. Under 978-nm laser excitation (up to 2.0 W), the Ho(3+)-doped phosphor exhibited green (medium), red (weak), and near-infrared (strong) emissions at ~ 546 ((5)F(4) → (5)I(8)), 658 ((5)F(7) → (5)I(8)), and 763 nm ((5)F(4) → (5)I(7)), respectively, and has the stable chromaticity coordinates of about (0.30, 0.66) in the visible-light region (400–700 nm). The Er(3+)-doped UC phosphor, on the other hand, showed weak green (~ 527/549 nm, (2)H(11/2),(4)S(3/2) → (4)I(15/2)), weak red (~668/672 nm, (4)F(9/2) → (4)I(15/2)), and strong near-infrared (~ 807/58 nm, (4)I(9/2) → (4)I(15/2)) luminescence, whose emission color in the visible region drifted from yellowish-green [(0.36, 0.61)] to green [(0.32, 0.64)] with increasing excitation power. Analysis of the power-dependent UC luminescence found three- and two-photon processes for RE=Ho and Er, respectively, and the possible UC mechanisms were proposed. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-017-2277-4) contains supplementary material, which is available to authorized users. Springer US 2017-08-24 /pmc/articles/PMC5570760/ /pubmed/28840548 http://dx.doi.org/10.1186/s11671-017-2277-4 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Nano Express Li, Ji-Guang Wang, Xuejiao Liu, Weigang Zhu, Qi Li, Xiaodong Sun, Xudong (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title | (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title_full | (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title_fullStr | (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title_full_unstemmed | (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title_short | (La(0.97)RE(0.01)Yb(0.02))(2)O(2)S Nanophosphors Converted from Layered Hydroxyl Sulfate and Investigation of Upconversion Photoluminescence (RE=Ho, Er) |
title_sort | (la(0.97)re(0.01)yb(0.02))(2)o(2)s nanophosphors converted from layered hydroxyl sulfate and investigation of upconversion photoluminescence (re=ho, er) |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5570760/ https://www.ncbi.nlm.nih.gov/pubmed/28840548 http://dx.doi.org/10.1186/s11671-017-2277-4 |
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