Moisture-induced degradation of the narrow-band red-emitting SrLiAl3N4:Eu2+ phosphor
来源期刊：JOURNAL OF RARE EARTHS2018年第4期
论文作者：Wenxia Li Zhen Song Dianpeng Cui Zhiguo Xia Quanlin Liu
文章页码：341 - 345
摘 要：The degradation of materials plays an important role in their application and service process. In this work, the moisture-induced degradation of SrLiAl3 N4:Eu2+（SLAN）, a very promising narrow-band redemitting phosphor, was comprehensively investigated by treating it in two different moisture conditions in order to reveal the potential mechanism and optimize the luminescence properties. The degradation rate gradually slows down with the decreasing environmental humidity indicating that water plays a key role in the degradation. Moreover, we take the other option with 100% humidity at different temperatures for rapid degradation. In the rapid degradation, the luminescence of SLAN is quenched quickly and the phase and micro structure change obviously, with the phosphor being bleached. The host turns into NH3, Al2 O3, Sr3 Al2（OH）12 and LiAl2（OH）7 finally. It is further confirmed that the rapid degradation occurs with the help of water and the phosphor is oxidized during this process.
Wenxia Li，Zhen Song，Dianpeng Cui，Zhiguo Xia，Quanlin Liu
The Beijing Municipal Key Laboratory of New Energy Materials and Technologies,School of Materials Science and Engineering,University of Science and Technology Beijing
摘 要：The degradation of materials plays an important role in their application and service process. In this work, the moisture-induced degradation of SrLiAl3 N4:Eu2+（SLAN）, a very promising narrow-band redemitting phosphor, was comprehensively investigated by treating it in two different moisture conditions in order to reveal the potential mechanism and optimize the luminescence properties. The degradation rate gradually slows down with the decreasing environmental humidity indicating that water plays a key role in the degradation. Moreover, we take the other option with 100% humidity at different temperatures for rapid degradation. In the rapid degradation, the luminescence of SLAN is quenched quickly and the phase and micro structure change obviously, with the phosphor being bleached. The host turns into NH3, Al2 O3, Sr3 Al2（OH）12 and LiAl2（OH）7 finally. It is further confirmed that the rapid degradation occurs with the help of water and the phosphor is oxidized during this process.
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