Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-23T11:11:36.821Z Has data issue: false hasContentIssue false
  • English
  • Français

Neutron Rietveld Analysis for Optimized CaMgSi2O6:Eu2+ and its Luminescent Properties

Published online by Cambridge University Press:  01 August 2005

Won Bin Im ,
Yong-Il Kim ,
Jong Hyuk Kang ,
Duk Young Jeon ,
Ha Kyun Jung  and
Kyeong Youl Jung
Won Bin Im
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
Yong-Il Kim
Affiliation:
Korea Research Institute of Standards and Science, Yuseong, Daejeon 305-600, Republic of Korea
Jong Hyuk Kang
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
Duk Young Jeon*
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
Ha Kyun Jung
Affiliation:
Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong-gu, Daejeon 305-600, Republic of Korea
Kyeong Youl Jung
Affiliation:
Advanced Materials Division, Korea Research Institute of Chemical Technology, Yuseong-gu, Daejeon 305-600, Republic of Korea
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

We optimized synthesis conditions of blue-emitting CaMgSi2O6:Eu2+ (CMS:Eu2+) with conventional solid-state reaction and successfully determined structure parameters by Rietveld refinement method with neutron powder diffraction data. The final weighted R-factor Rwp was 6.42% and the goodness-of-fit indicator S (= Rwp/Re) was 1.34. The refined lattice parameters of CMS:Eu2+ were a = 9.7472(3) Å, b = 8.9394(2) Å, and c = 5.2484(1) Å. The β angle was 105.87(1)°. The concentration quenching process was observed, and the critical quenching concentration of Eu2+ in CMS:Eu2+ was about 0.01 mol and critical transfer distance was calculated as 12 Å. With the help of the Rietveld refinement and Dexter theory, the critical transfer distance was also calculated as 27 Å. In addition, the dominant multipolar interaction of CMS:Eu2+ was investigated from the relationship between the emission intensity per activator concentration and activator concentration. The dipole–dipole interaction was a dominant energy transfer mechanism of electric multipolar character of CMS:Eu2+.

Keywords

LuminescenceNeutron scattering
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 8 , August 2005 , pp. 2061 - 2066
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Youkosawa, N., Sato, G. and Nakazawa, E.: Improvement of luminescence degradation of PDP blue phosphor with new UV phosphor. J. Electrochem. Soc. 150, H197 (2003).CrossRefGoogle Scholar
2Kunimoto, T., Yoshimatsu, R., Ohmi, K., Tanaka, S. and Kobayashi, H.: Feasibility study of silicate phosphor CaMgSi2O6:Eu2+ as blue PDP phosphor. IEICE Trans. Electron. E85–C,11 (2002).Google Scholar
3Im, W.B., Kang, J.H., Lee, D.C., Lee, S., Jeon, D.Y., Kang, Y.C. and Jung, K.Y.: Origin of PL intensity increase of CaMgSi2O6:Eu2+ phosphor after baking process for PDPs application. Solid State Commun. 133, 197 (2005).CrossRefGoogle Scholar
4Larson, A.C. and Von Dreele, R.B.: General Structure Analysis System (GSAS). Los Alamos National Laboratory Report LAUR. 86, 748 (1994).Google Scholar
5Ropp, R.C.: Luminescence and the Solid State (Elsevier, the Netherlands, 1991), Chap. 8.Google Scholar
6Phosphor Handbook, edited by Shinoya, S. and Yen, W.M. (CRC Press, 1998), Chap. 5.Google Scholar
7Finger, L.W., Cox, D.E. and Jephcoat, A.P.: A correction for powder diffraction peak asymmetry due to axial divergence. J. Appl. Crystallogr. 27, 892 (1994).CrossRefGoogle Scholar
8Levien, L. and Prewitt, C.T.: High-pressure structural study of diopside. Am. Mineral. 66, 315 (1981).Google Scholar
9Keskar, N.R. and Chelikowsky, J.R.: Structural properties of nine silica polymorphs. Phys. Rev. B 46, 1 (1992).CrossRefGoogle ScholarPubMed
10Shannon, R.D.: Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr. A. 32, 751 (1976).CrossRefGoogle Scholar
11Blasse, G. and Grabmaier, B.C.: Luminescent Materials (Springer-Verlag, Germany, 1994), Chap. 3.CrossRefGoogle Scholar
12Dexter, D.L.: A theory of sensitized luminescence in solids. J. Chem. Phys. 21, 836 (1953).CrossRefGoogle Scholar
13Blasse, G.: Energy transfer in oxidic phosphors. Philips Res. Pepts. 24, 131 (1969).Google Scholar
14Blasse, G.: Energy transfer between inequivalent Eu2+ ions. J. Solid State Chem. 62, 207 (1986).CrossRefGoogle Scholar
15Shin, S.H., Jeon, D.Y. and Suh, K.S.: Charge-transfer nature in luminescence of YNbO4:Bi blue phosphor. J. Appl. Phys. 90, 12 (2001).CrossRefGoogle Scholar
16Sohn, K.S., Cho, B.H. and Park, H.D.: Excitation energy-dependent photoluminescence behavior Zn2SiO4:Mn phosphors. Mater. Lett. 41, 303 (1999).CrossRefGoogle Scholar
17Van Uitert, L.G.: Characterization of energy transfer interactions between rare earth ions. J. Electrochem. Soc. 114, 1048 (1967).CrossRefGoogle Scholar
18Ozawa, L.: Cathodoluminescence: Theory and Applications (VCH, Japan, 1990), Chap. 6.Google Scholar