In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 74, No. 10 ( 2019-10-25), p. 765-772
Abstract:
Recently, Wang et al. (Z. Wang, J. Ha, Y. H. Kim, W. B. Im, J. McKittrick, S. P. Ong, Joule 2018 , 2 , 914–926) predicted and discovered Sr 2 LiAlO 4 , a quaternary compound with a layered structure crystallizing in the monoclinic space group P 2 1 / m , and they refined the structure from PXRD data. Upon partially substituting strontium with europium, the substance exhibits a yellow broadband luminescence consisting of two overlapping emission bands. In this paper, the crystal structure of Sr 2 LiAlO 4 is confirmed by additional SC-XRD measurements and a newly discovered polymorph of Sr 2 LiAlO 4 is presented crystallizing in the orthorhombic space group Cmcm . When Eu 2+ is incorporated, this polymorph exhibits only one of the emission bands present in the P 2 1 / m -polymorph. Additionally, two substitutional variants of Sr 2 LiAlO 4 are presented along with their luminescence properties upon incorporating Eu 2+ . One with a partial substitution of strontium for barium, leading to a structure in space group Pnma , and one with a partial substitution of oxygen for nitrogen, exhibiting the structure in space group Cmcm . The structure-property relationships in the above mentioned compounds are discussed with regard to their luminescence performance.
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2019-0133
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2019
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
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