Structural evolution induced preferential occupancy of designated cation sites by Eu2+ in M5(Si3O9)2 (M = Sr, Ba, Y, Mn) phosphors

Yi Wei, Chun Che Lin, Zewei Quan, Maxim S. Molokeev, Victor V. Atuchin, Ting Shan Chan, Yujun Liang, Jun Lin, Guogang Li

研究成果: 雜誌貢獻文章同行評審

75 引文 斯高帕斯(Scopus)

摘要

In this paper, we present new insight into a changing Eu2+ crystallographic site preference in Eu-doped M5(Si3O9)2 (M = Sr, Ba, Y, Mn), which is related to the structural variation induced by M cation substitutions. The effect of the local structural geometry on the luminescence properties of Eu2+ is revealed. By substitution of Ba2+ for Sr2+, the lattice expansion is restricted to specific cation sites, resulting in the abrupt blue shifted emission of Eu2+ ions. The abnormal blue shift on replacing Sr2+ with Mn2+ is attributed to the preferential 6-fold coordination for Mn2+ that moves the Eu2+ ions to other sites. The results elucidate the mechanisms of emission band adjustment by local site coordination change and it can be potentially extended to crystals which properties are sensitive to local lattice variations.
原文英語
頁(從 - 到)57261-57265
頁數5
期刊RSC Advances
6
發行號62
DOIs
出版狀態已發佈 - 1月 1 2016
對外發佈

ASJC Scopus subject areas

  • 一般化學
  • 一般化學工程

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