| dc.contributor.author | Juarez, Xitlali G | |
| dc.contributor.author | Ko, Hyungduk | |
| dc.contributor.author | Jang, Ho S | |
| dc.date.accessioned | 2021-09-20T17:30:16Z | |
| dc.date.available | 2021-09-20T17:30:16Z | |
| dc.date.issued | 2018-01-23 | |
| dc.identifier.uri | https://hdl.handle.net/1721.1/131789 | |
| dc.description.abstract | Abstract
Efficient upconversion (UC)–downshifting (DS), dual-mode-emitting NaGdF4:Yb,Tm/NaGdF4:Tb/NaYF4 core/shell/shell (C/S/S) nanophosphors (NPs) were synthesized. The UC luminescence color changed from blue to sky blue after doping Tb3+ into NaGdF4 shell because Tb3+ emission peaks via 5D4 → 7FJ transition were observed with Tm3+ emission peaks via 1D2 → 3F4 and 1G4 → 3H6 transitions through the energy migration UC process of Yb3+ → Tm3+ → Gd3+ → Tb3+. Upon increasing the Tb3+ concentration in the NaGdF4 shell from 5 to 15%, the Commission Internationale de l’Éclairage (CIE) color coordinates changed from (0.2188, 0.2390) to (0.2616, 0.3654). When NaGdF4:Yb(49%),Tm(1%)/NaGdF4:Tb(15%)/NaYF4 NPs were excited using 273 nm ultraviolet light, the C/S/S NPs exhibited bright green light with CIE color coordinates of (0.3354, 0.5090) as a result of energy transfer from Gd3+ to Tb3+. These bright UC–DS, dual-mode-emitting C/S/S NPs could be applied in various applications, including multiplexed imaging and anticounterfeiting. | en_US |
| dc.publisher | Springer Netherlands | en_US |
| dc.relation.isversionof | https://doi.org/10.1007/s11164-018-3276-5 | en_US |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
| dc.source | Springer Netherlands | en_US |
| dc.title | Strong upconversion–downshifting green emission from Tb3+ ions in core/shell/shell-structured nanophosphors | en_US |
| dc.type | Article | en_US |
| dc.contributor.department | Massachusetts Institute of Technology. Department of Materials Science and Engineering | |
| dc.eprint.version | Author's final manuscript | en_US |
| dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
| eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
| dc.date.updated | 2020-09-24T20:39:45Z | |
| dc.language.rfc3066 | en | |
| dc.rights.holder | Springer Science+Business Media B.V., part of Springer Nature | |
| dspace.embargo.terms | Y | |
| dspace.date.submission | 2020-09-24T20:39:45Z | |
| mit.license | PUBLISHER_POLICY | |
| mit.metadata.status | Authority Work and Publication Information Needed | |
