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Role of flux in the production process of red phosphors for white LEDs

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Abstract

Eu3+-doped potassium tungstate phosphor was synthesized by solid-state reactions. The as-produced phosphor was re-fired with a small amount of flux-like alkali carbonates and boron oxide. It was confirmed that the re-firing process containing a flux led to the uniform particle growth with smooth surface and improved Eu3+ distribution at the surface of particles, resulting in the enhanced red emission. The X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS) analyses were used to determine the role of flux in the system.

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Acknowledgement

This research was partially sponsored by the Samsung Electro-Mechanics Co. and by BK21 program of the ministry of Education, Republic of Korea (2005).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, South Korea

    Gwan-Hyoung Lee & Shinhoo Kang

  2. Samsung Electro-Mechanics Co. Ltd., Suwon, 443-743, South Korea

    Chulsoo Yoon

Authors
  1. Gwan-Hyoung Lee
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  2. Chulsoo Yoon
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  3. Shinhoo Kang
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Correspondence to Shinhoo Kang.

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Lee, GH., Yoon, C. & Kang, S. Role of flux in the production process of red phosphors for white LEDs. J Mater Sci 43, 6109–6115 (2008). https://doi.org/10.1007/s10853-008-2943-0

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  • DOI: https://doi.org/10.1007/s10853-008-2943-0

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