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Structural ordering and charge variation induced by cation substitution in (Sr,Ca)AlSiN3:Eu phosphor
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dc.contributor.author | Tsai, Yi-Ting | |
dc.contributor.author | Chiang, Chang-Yang | |
dc.contributor.author | Zhou, Wuzong | |
dc.contributor.author | Lee , Jyh-Fu | |
dc.contributor.author | Sheu, Hwo-Shuenn | |
dc.contributor.author | Liu, Ru-Shi | |
dc.date.accessioned | 2016-07-09T23:31:16Z | |
dc.date.available | 2016-07-09T23:31:16Z | |
dc.date.issued | 2015-07-22 | |
dc.identifier | 207296762 | |
dc.identifier | 07b4dbab-f3c4-4be3-bd9c-6c50f08ee305 | |
dc.identifier | 84937719410 | |
dc.identifier | 000358556200018 | |
dc.identifier.citation | Tsai , Y-T , Chiang , C-Y , Zhou , W , Lee , J-F , Sheu , H-S & Liu , R-S 2015 , ' Structural ordering and charge variation induced by cation substitution in (Sr,Ca)AlSiN 3 :Eu phosphor ' , Journal of the American Chemical Society , vol. 137 , no. 28 , pp. 8936-8939 . https://doi.org/10.1021/jacs.5b06080 | en |
dc.identifier.issn | 0002-7863 | |
dc.identifier.other | ORCID: /0000-0001-9752-7076/work/58055010 | |
dc.identifier.uri | https://hdl.handle.net/10023/9103 | |
dc.description | This work was supported by the Ministry of Science and Tech-nology of Taiwan (Contract No. MOST 101-2113-M-002-014-MY3) and Mitsubishi Chemical Group, Science and Technology Research Center Inc., Japan. We also appreciate to the discussion by Dr. Kyota Ueda and Mr. Fumitaka Yoshimura. | en |
dc.description.abstract | Nitride phosphors which are suitable for white light-emitting diode applications. In this study, the structure of phosphor has been modified through cation substitution to induce charge variation and a rearrangement of neighboring nitride clusters, and consequently enhance its luminescent behavior. Substitution of Ca2+ by Sr2+ cations expanded the lattice volume and the b-c plane, but shortened the distance between the layers along the a axis. Lattice distortion of the framework introduced high-coordination sites in the Sr/Eu centers and adequate space, thereby facilitating charge variation of activators under reduced atmosphere, as detected through X-ray absorption near-edge structure spectroscopy. As such, the photoluminescent intensity of the phosphors increased by more than 10% and a blue shift occurred. The microstructures of the samples were also analyzed using high-resolution transmission electron microscopy. Cation substitution induced a special change in the anion environment, as indicated in the solid-state Raman spectra. Moreover, a typical ordering variations in the SiN4 and AlN4 clusters are generated in the lattice. Meanwhile, neighbor sequence of (Si/Al)N4 around the divalent centers were observed through solid-state nuclear magnetic resonance spectroscopy. The modified ordering distribution resulted in a rigid structure and improved the thermal quenching behavior. Thermal stability has been enhanced by 10% at 473 K when x = 0.9 in SrxCa0.993-xAlSiN3:Eu2+0.007 compared with that at x = 0. This study promotes the research of neighbor sequence for selective tetrahedral sites such as Li, Mg, Al, Si coordinated by N atoms contact with cation sites. | |
dc.format.extent | 684612 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of the American Chemical Society | en |
dc.subject | QD Chemistry | en |
dc.subject | NDAS | en |
dc.subject | BDC | en |
dc.subject.lcc | QD | en |
dc.title | Structural ordering and charge variation induced by cation substitution in (Sr,Ca)AlSiN3:Eu phosphor | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | https://doi.org/10.1021/jacs.5b06080 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2016-07-10 | |
dc.identifier.url | https://pubs.acs.org/doi/suppl/10.1021/jacs.5b06080 | en |
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