Large Redshifts in Emission and Excitation from Eu2+-Activated Sr2SiO4 and Ba2SiO4 Phosphors Induced by Controlling Eu2+ Occupancy on the Basis on Crystal-Site Engineering

Autor:	Hiroki Kuwahara, Takaki Masaki, Makoto Kobayashi, Yasushi Sato, Masato Kakihana, Hideki Kato
Rok vydání:	2015
Předmět:	Crystal Materials science Photoluminescence business.industry Analytical chemistry Optoelectronics Phosphor Emission spectrum business Excitation Redshift
Zdroj:	Optics and Photonics Journal. :326-333
ISSN:	2160-889X 2160-8881
DOI:	10.4236/opj.2015.511031
Popis:	The photoluminescence properties of Eu2+-activated α’-Sr2SiO4 and α’-Ba2SiO4 with a high Eu2+ concentration were investigated. In the case of Sr2-xEuxSiO4, emission was shifted from 585 to 611 nm with increasing the total Eu2+ concentration (x) from 0.1 to 0.8. This trend was similar to that in Ba2-xEuxSiO4, where the emission was shifted from 513 to 545 nm. The large redshifts in both the excitation and emission spectra were discussed in terms of the Eu2+ occupancies on two kinds of M sites and their local structural changes (M: Sr and Ba).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::678e34c2d30784af65a0ffefeaae47f3 https://doi.org/10.4236/opj.2015.511031 Zobrazit plný text záznamu