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- W1996503526 abstract "Sr 4 Al 14 O 25 –Eu,Dy photoluminescent material with high brightness and long afterglow was prepared by sintering at high-temperature and weak-reducing atmosphere. The luminescent properties of Sr 4 Al 14 O 25 -based luminescent materials have been studied systematically. The analytical results indicated that the emission spectra of Sr 4 Al 14 O 25 –Eu,Dy are similar to that of Sr 4 Al 14 O 25 –Eu. Both of them have two main peaks near 424 and 486 nm, respectively, which are ascribed to two types of Eu 2+ that existed in the Sr 4 Al 14 O 25 matrix crystal. However, the Sr 4 Al 14 O 25 –Eu phosphor does not have the long-afterglow phenomenon; the Sr 4 Al 14 O 25 –Eu,Dy showed the obvious long afterglow. As for the mechanism of the long afterglow of this phosphor, Dy 3+ acted as the trap level and captured the free holes in the system. It is the trapped–detrapped recombination process that resulted in the long-afterglow phenomenon of this phosphor." @default.
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- W1996503526 date "2001-10-01" @default.
- W1996503526 modified "2023-09-29" @default.
- W1996503526 title "Preparation of long-afterglow Sr4Al14O25-based luminescent material and its optical properties" @default.
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- W1996503526 doi "https://doi.org/10.1016/s0167-577x(01)00257-9" @default.
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