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Luminescence properties of Pr6O11-doped and PrF3-doped germanate glasses for wideband NIR phosphor

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Abstract

We have synthesized 0.12Pr6O11–45Sb2O3–10ZnO–45GeO2 glass and 0.72PrF3–45Sb2O3–10ZnO–45GeO2 as a wideband near-infrared phosphor for LED-based light-sources. We have achieved an ultra-wideband luminescence from 700 to 1100 nm from both samples. Luminescence intensity around 730 nm (3P0 → 3F4 transition) was lower than that around 1040 nm (1D2 → 3F4 transition) in the Pr6O11-doped sample. On the other hand, luminescence intensity around 730 nm was higher than that around 1040 nm in PrF3-doped sample. These results indicated that a phonon energy around Pr3+ ions should be decreased by substituting PrF3 for Pr6O11. An output power of the PrF3-doped sample was 1.5 times higher than that of the Pr6O11-doped sample. A measured fluorescence lifetime of 1D2 level in the PrF3-doped sample was shorter than that in the Pr6O11-doped one. These results indicated that oxide glasses doped with rare-earth fluoride should be useful for our practical wideband NIR phosphor.

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Acknowledgements

This work was supported in part by JSPS KAKENHI Grant Number 15K06441 and by Knowledge Hub Aichi Project. We thank Prof. Miki Hasegawa, Dr. Ayumi Ishii, and Mr. Syuhei Ogata for their support in the FTIR measurements.

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Authors and Affiliations

  1. College of Science and Engineering, Aoyama Gakuin University, Fuchinobe 5-10-1, Chuo-ku, Sagamihara-shi, Kanagawa, 252-5258, Japan

    Shingo Fuchi, Wataru Ishikawa & Seiya Nishimura

  2. Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation, Minamiyamaguchi-cho 250-3, Seto-shi, Aichi, 489-0965, Japan

    Yoshikazu Takeda

Authors
  1. Shingo Fuchi
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  2. Wataru Ishikawa
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  3. Seiya Nishimura
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  4. Yoshikazu Takeda
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Correspondence to Shingo Fuchi.

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Fuchi, S., Ishikawa, W., Nishimura, S. et al. Luminescence properties of Pr6O11-doped and PrF3-doped germanate glasses for wideband NIR phosphor. J Mater Sci: Mater Electron 28, 7042–7046 (2017). https://doi.org/10.1007/s10854-016-6218-2

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  • DOI: https://doi.org/10.1007/s10854-016-6218-2

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