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Transparent and highly luminescent Eu-oxide thin film phosphors on sapphire substrates

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Abstract

Transparent and highly luminescent thin film phosphors were prepared by the thermal evaporation of Euoxide and its subsequent deposition on (006) sapphire substrates in a vacuum in a strongly reducing atmosphere at 1200°C–1300°C. The resulting phosphor films, which were 1–3 µm thick, strongly adhered to the substrate and exhibited photoluminescence spectra similar to those of Eu-doped β″-alumina, with an emission peak centered at about 525 nm. The films consisted of Eu2O3 and β″-alumina phases with preferential growth planes. The transparency of the thin film phosphors was measured over the UV-visible range (370–720 nm). The average transparency was 26%–55% of the total incident light. The integrated photoluminescence intensities of the phosphor films were compared to that of a commercial powder phosphor with green-light emission.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Hoseo University, Asan, Chungnam, 336-795, Korea

    Ki-Woong Chae & Chae Il Cheon

  2. Department of Display Engineering, Hoseo University, Asan, Chungnam, 336-795, Korea

    Ta-Ryeong Park & Jeong Seog Kim

  3. Department of Electronic Engineering, Sunmoon University, Asan, Chungnam, 336-708, Korea

    Nam In Cho

Authors
  1. Ki-Woong Chae
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  2. Ta-Ryeong Park
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  3. Chae Il Cheon
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  4. Nam In Cho
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  5. Jeong Seog Kim
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Correspondence to Jeong Seog Kim.

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Chae, KW., Park, TR., Cheon, C.I. et al. Transparent and highly luminescent Eu-oxide thin film phosphors on sapphire substrates. Electron. Mater. Lett. 9 (Suppl 1), 59–63 (2013). https://doi.org/10.1007/s13391-013-3175-2

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  • DOI: https://doi.org/10.1007/s13391-013-3175-2

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