Large Redshifts in Emission and Excitation from Eu<sup>2+</sup>-Activated Sr<sub>2</sub>SiO<sub>4</sub>and Ba<sub>2</sub>SiO<sub>4</sub>Phosphors Induced by Controlling Eu<sup>2+</sup>Occupancy on the Basis on Crystal-Site Engineering
Large Redshifts in Emission and Excitation from Eu<sup>2+</sup>-Activated Sr<sub>2</sub>SiO<sub>4</sub>and Ba<sub>2</sub>SiO<sub>4</sub>Phosphors Induced by Controlling Eu<sup>2+</sup>Occupancy on the Basis on Crystal-Site Engineering作者机构：Department of Chemistry Faculty of Science Okayama University of Science Okayama Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai Japan School of Advanced Materials Science and Engineering Sungkyunkwan University Suwon Republic of Korea
出 版 物：《Optics and Photonics Journal》 (光学与光子学期刊（英文）)
年 卷 期：2015年第5卷第11期
页 面：326-333页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Photoluminescence Red-Emitting Phosphors Green-Emitting Phosphors Orthosilicates Crystal-Site Engineering
摘 要：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).
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