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New oxide phosphors for FEDs: Ruddlesden—Popper phases synthesized with IIIB‐group elements
Author(s) -
Yamamoto Haijme,
Okamoto Shinji,
Mitsumine Satoe
Publication year - 2000
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1828757
Subject(s) - phosphor , impurity , materials science , strontium , oxide , luminescence , alkaline earth metal , crystal structure , optoelectronics , chemistry , crystallography , metallurgy , metal , organic chemistry
— A red‐emitting phosphor, SrTiO 3 :Pr 3+ , for low‐voltage‐type FEDs and VFDs was developed by Futaba Corporation in 1996. The addition of Al or Ga is essential in the preparation of this phosphor because it improves the luminescence efficiency dramatically. For this impurity effect, Futaba Corporation proposed a charge‐compensation mechanism, which was supported by a recent observation of emission lines due to Al 3+ ‐Pr 3+ pairs. In addition, it was found that Al also works as a scavenger of planar defects, presumably SrO thin layers interleaved in the SrTiO 3 lattice, by forming strontium aluminates. The latter mechanism suggests the possibility that a similar impurity effect can be found in materials with crystal structures, including alkaline‐earth oxide layers (Ruddlesden‐Popper phases).