dc.contributor.author |
Yang, Tingxuan |
|
dc.contributor.author |
Ma, Zhihong |
|
dc.contributor.author |
Huang, Saifang |
|
dc.contributor.author |
Zhang, Ting |
|
dc.contributor.author |
Zhao, Kai |
|
dc.contributor.author |
Yin, Li |
|
dc.contributor.author |
Gu, Qinfen |
|
dc.contributor.author |
Cao, Peng |
|
dc.date.accessioned |
2022-08-15T02:59:26Z |
|
dc.date.available |
2022-08-15T02:59:26Z |
|
dc.date.issued |
2022-02-01 |
|
dc.identifier.citation |
(2022). Journal of Alloys and Compounds, 892, 162066-. |
|
dc.identifier.issn |
0925-8388 |
|
dc.identifier.uri |
https://hdl.handle.net/2292/60791 |
|
dc.description.abstract |
The design of phosphors simultaneously having excellent quantum efficiency, ultra-narrow emission band and zero thermal quenching is yet a big challenge. Herein, we report a blue-emitting K2SrBa(PO4)2:xEu2+ phosphor with ultra-narrow emission peaked at 425 nm with a full width at half maximum (FWHM) of 37 nm (2088 cm−1), high color purity (0.93), together with superior thermal stability and quantum efficiency. This phosphor displays an external quantum efficiency (EQE) of 75.3%, exceeding those of blue phosphors reported thus far. It also has excellent thermal stability showing near zero thermal quenching up to 300 °C, retaining 102%, 100% and 96% of its initial integrated emission intensity at 75, 200 and 300 °C, respectively. Rietveld refinements and density functional theory (DFT) calculations reveal that the Eu2+ ions preferentially occupy the Sr/Ba sites, rather than the K sites, of the host structure, contributing to the superior photoluminescence properties. The as-developed phosphors can be potentially applied in the phosphor-converted white light emitting diodes (pc-WLEDs) for applications such as high-power lighting and backlight display. |
|
dc.language |
en |
|
dc.publisher |
Elsevier |
|
dc.relation.ispartofseries |
Journal of Alloys and Compounds |
|
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
|
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
|
dc.subject |
Science & Technology |
|
dc.subject |
Physical Sciences |
|
dc.subject |
Technology |
|
dc.subject |
Chemistry, Physical |
|
dc.subject |
Materials Science, Multidisciplinary |
|
dc.subject |
Metallurgy & Metallurgical Engineering |
|
dc.subject |
Chemistry |
|
dc.subject |
Materials Science |
|
dc.subject |
Blue phosphor |
|
dc.subject |
K2SrBa(PO4)(2) |
|
dc.subject |
Quantum efficiency |
|
dc.subject |
Thermal quenching |
|
dc.subject |
White LEDs |
|
dc.subject |
LUMINESCENCE PROPERTIES |
|
dc.subject |
FIELD |
|
dc.subject |
CRYSTAL |
|
dc.subject |
EU2+ |
|
dc.subject |
PHOTOLUMINESCENCE |
|
dc.subject |
IMPROVEMENT |
|
dc.subject |
PROPERTY |
|
dc.subject |
NA |
|
dc.subject |
0204 Condensed Matter Physics |
|
dc.subject |
0912 Materials Engineering |
|
dc.subject |
0914 Resources Engineering and Extractive Metallurgy |
|
dc.title |
Ultra-narrow-band blue-emitting K2SrBa(PO4)2:Eu2+ phosphor with superior efficiency and thermal stability |
|
dc.type |
Journal Article |
|
dc.identifier.doi |
10.1016/j.jallcom.2021.162066 |
|
pubs.begin-page |
162066 |
|
pubs.volume |
892 |
|
dc.date.updated |
2022-07-21T05:16:38Z |
|
dc.rights.holder |
Copyright: The authors |
en |
pubs.author-url |
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000705053200002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=6e41486220adb198d0efde5a3b153e7d |
|
pubs.publication-status |
Published |
|
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
|
pubs.subtype |
Journal |
|
pubs.elements-id |
869689 |
|
pubs.org-id |
Engineering |
|
pubs.org-id |
Chemical and Materials Eng |
|
dc.identifier.eissn |
1873-4669 |
|
pubs.number |
162066 |
|
pubs.record-created-at-source-date |
2022-07-21 |
|
pubs.online-publication-date |
2022-02 |
|