Photoluminescence properties of(Gd1-xEux)Ba3B9O18red emitting phosphors
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：ZHANG Xinmin CHEN Hong KIM Jongsu
Key words：photoluminescence; phosphor; GdBa3B9O18; europium; rare earths;
Abstract: Eu3+-activated GdBa3B9O18 phosphors were prepared by solid-state reaction at high temperature, and their photoluminescence (PL) properties were investigated. (Gd1-xEux)Ba3B9O18 formed solid solutions in the range x=0-1.0. The optical band gaps calculated from absorption spectra were 5.54 eV for GdBa3B9O18 and 5.17 eV for EuBa3B9O18. Unactivated GdBa3B9O18 exhibited a typical characteristic excitation and emission of Gd3+ ion. The (Gd1-xEux)Ba3B9O18 phosphors showed well-known Eu3+ excitation and emission. The energy transfer from Gd3+ to Eu3+ was verified with PL spectra. The dependence of PL intensity on Eu3+ concentration was also studied in detail. The luminescence decay measurements indicated that the lifetimes of 5D0→7F1 transition of Eu3+ were in the order of millisecond.
ZHANG Xinmin1，CHEN Hong1，KIM Jongsu2
(1.School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004,China;
2.Division of Imagesystem Science and Engineering Pukyong National University Busan 608-739 Korea)
Abstract:Eu3+-activated GdBa3B9O18 phosphors were prepared by solid-state reaction at high temperature, and their photoluminescence (PL) properties were investigated. (Gd1-xEux)Ba3B9O18 formed solid solutions in the range x=0-1.0. The optical band gaps calculated from absorption spectra were 5.54 eV for GdBa3B9O18 and 5.17 eV for EuBa3B9O18. Unactivated GdBa3B9O18 exhibited a typical characteristic excitation and emission of Gd3+ ion. The (Gd1-xEux)Ba3B9O18 phosphors showed well-known Eu3+ excitation and emission. The energy transfer from Gd3+ to Eu3+ was verified with PL spectra. The dependence of PL intensity on Eu3+ concentration was also studied in detail. The luminescence decay measurements indicated that the lifetimes of 5D0→7F1 transition of Eu3+ were in the order of millisecond.
Key words:photoluminescence; phosphor; GdBa3B9O18; europium; rare earths;
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