Journal Highlight: Fabrication of wideband near-infrared phosphor by stacking Sm3+-doped glass on Pr3+-doped glass phosphors

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  • Published: Jan 7, 2013
  • Author: spectroscopyNOW
  • Channels: Infrared Spectroscopy
thumbnail image: Journal Highlight: Fabrication of wideband near-infrared phosphor by stacking Sm<sup>3+</sup>-doped glass on Pr<sup>3+</sup>-doped glass phosphors

Fabrication of wideband near-infrared phosphor by stacking Sm3+-doped glass on Pr3+-doped glass phosphors

physica status solidi (c), 2012, 9, 2340-2343
Koji Oshima, Kengo Terasawa, Shingo Fuchi, Yoshikazu Takeda

Glass phosphors doped with praseodymium and samarium were fabricated to give wideband luminescence that is suitable for the absorption spectrometry of agricultural products.

Abstract: We synthesized the Pr3+-doped Bi2O3-Sb2O3-B2O3 glass phosphor and the Sm3+-doped CaO-Sb2O3-B2O3 glass phosphor in order to fabricate a wideband luminescence. The luminescence bands of the Pr3+-doped glass phosphor were from 760 nm to 910 nm and from 920 nm to 1100 nm. The luminescence bands of the Sm3+-doped glass phosphor were from 840 nm to 1060 nm. The excitation band of the Pr3+-doped glass phosphor coincided with that of the Sm3+-doped glass phosphor at around 475 nm. We achieved the wideband luminescence from 760 nm to 1100 nm by stacking the Pr3+-doped glass phosphor (0.1 mol% Pr6O11, 10 mm) on the Sm3+-doped glass phosphor (0.5 mol% Sm2O3, 10 mm) excited by one LED (470 nm). This luminescence covered the wavelength region that is suitable for the absorption spectrometry of agricultural products.

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