Eu3+ Luminescence in Two-Dimensional Sr2-2xEuxKxSnO4 with K2NiF4 Structure

2차원적 K2NiF4형 구조의 Sr2-2xEuxKxSnO4에서 Eu3+ 이온의 Luminescence

  • Yo, Chul-Hyun (Department of Chemistry, Yonsei University) ;
  • Minh Chau, P.T. (Institute of Materials Science-National Center for Natural Science and Technology of Vietnam) ;
  • Ryu, Kwang-Hyun (Department of Chemistry, Yonsei University) ;
  • Kim, Anh-T. (Institute of Materials Science-National Center for Natural Science and Technology of Vietnam)
  • Published : 19970400

Abstract

Luminescence of $Eu^{3+}$ has been studied in $Sr_{2-2x}Eu_xK_xSnO_4$ with two-dimensional $K_2NiF_4$ structure. The $^5D_o$$^7F_o$$Eu^{3+}$ ion represents the J=0 → J=0 transition which is forbidden by a Judd-Ofelt selection rule for electric dipole transition in 4f shell of $Eu^{3+}$ ions. However, the emission line of $^5D_o$$^7F_o$$Eu^{3+}$ emission spectra of Sr2-2xEuxKxSnO4$Sr_{2-2x}Eu_xK_xSnO_4$structure around $Eu^{3+}$ ions.

2차원적 $K_2NiF_4$형 구조를 갖는 $Sr_{2-2x}Eu_xK_xSnO_4$의 주격자 안에 존재하는 Eu3+ 이온의 luminescence에 대한 연구를 수행하였다. $Eu^{3+}$ 이온의 $^5D_o$$^7F_o$ 전이에 의한 방출선은 J=0 → J=0 전이로써 $Eu^{3+}$ 이온의 4f 껍질에서 전기 이중극자 전이에 대한 Judd-Ofelt 선택규칙(selection rule)에 의하여 금지된 전이이다. 그러나 $Sr_{2-2x}Eu_xK_xSnO_4$의 Eu3+ 이온의 방출 스펙트라에서는 $^5D_o$$^7F_o$$^5D_o$ → $^7F_o$

Keywords

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