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ScienceON<P>Sr<SUB>2–<I>y</I>–<I>z</I></SUB>Ca<SUB><I>z</I></SUB>Si(O<SUB>1–<I>x</I></SUB>N<SUB><I>x</I></SUB>)<SUB>4</...
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Evolution of Luminescence of Sr<sub>2–<i>y</i>–<i>z</i></sub>Ca<sub><i>z</i></sub>Si(O<sub>1–<i>x</i></sub>N<sub><i>x</i></sub>)<sub>4</sub>:<i>y</i>Eu<sup>2+</sup> with N<sup>3–</sup>, Eu<sup>2+</sup>, and Ca<sup>2+</sup> Sub
한글로보기https://www.riss.kr/link?id=A107673438
- 저자
- 발행기관
- 학술지명
- 권호사항
-
발행연도
2013
-
작성언어
-
-
등재정보
SCOPUS,SCIE
-
자료형태
학술저널
-
수록면
5204-5210(7쪽)
- 제공처
-
0
상세조회 -
0
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부가정보
다국어 초록 (Multilingual Abstract)
<P>Sr<SUB>2–<I>y</I>–<I>z</I></SUB>Ca<SUB><I>z</I></SUB>Si(O<SUB>1–<I>x</I></SUB>N<SUB><I>x</I></SUB>)<SUB>4</SUB>:<I>y</I>Eu<SUP>2+</SUP> (SCSON:Eu<SUP>2+</SUP>) solid solutions were prepared by substituting N<SUP>3-</SUP>, Eu<SUP>2+</SUP>, and Ca<SUP>2+</SUP> ions into Sr<SUB>2</SUB>SiO<SUB>4</SUB> (SSO). These ions contributed differently to the evolution of luminescence of SCSON:Eu<SUP>2+</SUP>. SSON:Eu<SUP>2+</SUP> (<I>z</I> = 0) has two activation centers: Eu(I) and Eu(II). The nitridation effects led to a dramatic change in the crystal field surrounding the Eu(II) site but rarely affected the Eu(I) site. Accordingly, SSON:Eu<SUP>2+</SUP> exhibited broad excitation spectra from ultraviolet to visible wavelengths. In comparison with the Eu(II) green emissions of SSO:Eu<SUP>2+</SUP>, the dominant peak wavelengths (DPWs) of the Eu(II) emissions were at red emission regions (605–630 nm), depending on the amount of Eu<SUP>2+</SUP> ions. The Ca<SUP>2+</SUP> ions of SCSON:Eu<SUP>2+</SUP> preferentially changed the emission wavelength assigned to Eu(I) and affected the Eu(II) emission intensity. In addition to the spectral properties, the chromaticity coordinates and a low thermal quenching behavior of SCSON:Eu<SUP>2+</SUP> powders demonstrated that they can be a novel red phosphors for use in white light emitting diodes.</P><P>The dramatic red-shift from green to red and the enhanced emission intensity of Sr<SUB>2−<I>z</I></SUB>Ca<SUB><I>z</I></SUB>Si(O<SUB>1−<I>x</I></SUB>N<SUB><I>x</I></SUB>)<SUB>4</SUB>:Eu<SUP>2+</SUP>.</P><P><B>Graphic Abstract</B>
<IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2013/cgdefu.2013.13.issue-12/cg400751n/production/images/medium/cg-2013-00751n_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg400751n'>ACS Electronic Supporting Info</A></P>
<IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2013/cgdefu.2013.13.issue-12/cg400751n/production/images/medium/cg-2013-00751n_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg400751n'>ACS Electronic Supporting Info</A></P>
<P>Sr<SUB>2–<I>y</I>–<I>z</I></SUB>Ca<SUB><I>z</I></SUB>Si(O<SUB>1–<I>x</I></SUB>N<SUB><I>x</I></SUB>)<SUB>4</SUB>:<I>y</I>Eu<SUP>2+</SUP> (SCSON:Eu<SUP>2+</SUP>) solid solutions were prepared by substituting N<SUP>3-</SUP>, Eu<SUP>2+</SUP>, and Ca<SUP>2+</SUP> ions into Sr<SUB>2</SUB>SiO<SUB>4</SUB> (SSO). These ions contributed differently to the evolution of luminescence of SCSON:Eu<SUP>2+</SUP>. SSON:Eu<SUP>2+</SUP> (<I>z</I> = 0) has two activation centers: Eu(I) and Eu(II). The nitridation effects led to a dramatic change in the crystal field surrounding the Eu(II) site but rarely affected the Eu(I) site. Accordingly, SSON:Eu<SUP>2+</SUP> exhibited broad excitation spectra from ultraviolet to visible wavelengths. In comparison with the Eu(II) green emissions of SSO:Eu<SUP>2+</SUP>, the dominant peak wavelengths (DPWs) of the Eu(II) emissions were at red emission regions (605–630 nm), depending on the amount of Eu<SUP>2+</SUP> ions. The Ca<SUP>2+</SUP> ions of SCSON:Eu<SUP>2+</SUP> preferentially changed the emission wavelength assigned to Eu(I) and affected the Eu(II) emission intensity. In addition to the spectral properties, the chromaticity coordinates and a low thermal quenching behavior of SCSON:Eu<SUP>2+</SUP> powders demonstrated that they can be a novel red phosphors for use in white light emitting diodes.</P><P>The dramatic red-shift from green to red and the enhanced emission intensity of Sr<SUB>2−<I>z</I></SUB>Ca<SUB><I>z</I></SUB>Si(O<SUB>1−<I>x</I></SUB>N<SUB><I>x</I></SUB>)<SUB>4</SUB>:Eu<SUP>2+</SUP>.</P><P><B>Graphic Abstract</B>
<IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2013/cgdefu.2013.13.issue-12/cg400751n/production/images/medium/cg-2013-00751n_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cg400751n'>ACS Electronic Supporting Info</A></P>
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