Synthesis and photoluminescent properties of Sm3+-activated La3Si6N11 as an orange-red emitting phosphor
来源期刊：JOURNAL OF RARE EARTHS2021年第2期
论文作者：Lili Liu Junfei Zhang Fanfan Xu Fu Du Fengli Yang Jiaqing Peng Xinyu Ye
摘 要：A series of Sm3+-doped La3 Si6 N11 phosphor materials we re synthesized by a high temperature solid-state reaction method.The crystal structure,micro structure,photoluminescence properties,decay curves as well as thermal quenching properties of the as-prepared phosphors were investigated systematically.The excitation spectra contain a wide asymmetric band below 350 nm originating from the host absorption,several sharp excitation peaks in the range of 300-550 nm corresponding to f-f transition of Sm3+.Under the excitation of 369 and 414 nm light,the phosphors exhibit strong narrow-band orangered emission peaked at 605 nm.The average decay time of La2.99Si6 N11:0.01 Sm3+sample is fitted to be0.38 ms and the CIE coordinates were calculated to be（0.6105,0.3833）.For water resistance,La3 Si6 N11:Sm3+is better than K2 SiF6:Mn4+phosphor.After soaking in deionized water for 300 min,the La3 Si6 N11:Sm3+sample retains approximately 80% of its initial relative emission intensity.When the temperature rises to 423 K（150℃）,the emission intensity of La2.99Si6 N11:0.01 Sm3+sample remains 85%in co mparison to that of room tempe rature.The activation energy was calculated to be 0.63253 eV,which is higher than those of Sm3+-activated oxide phosphors,indicating that the phosphor has relatively good thermal stability.
Lili Liu1,2，Junfei Zhang1,2，Fanfan Xu1,2，Fu Du1,2，Fengli Yang1,2，Jiaqing Peng1,2，Xinyu Ye1,2,3
1. Faculty of Materials,Metallurgy and Chemistry,Jiangxi University of Science and Technology2. Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province
摘 要：A series of Sm3+-doped La3 Si6 N11 phosphor materials we re synthesized by a high temperature solid-state reaction method.The crystal structure,micro structure,photoluminescence properties,decay curves as well as thermal quenching properties of the as-prepared phosphors were investigated systematically.The excitation spectra contain a wide asymmetric band below 350 nm originating from the host absorption,several sharp excitation peaks in the range of 300-550 nm corresponding to f-f transition of Sm3+.Under the excitation of 369 and 414 nm light,the phosphors exhibit strong narrow-band orangered emission peaked at 605 nm.The average decay time of La2.99Si6 N11:0.01 Sm3+sample is fitted to be0.38 ms and the CIE coordinates were calculated to be（0.6105,0.3833）.For water resistance,La3 Si6 N11:Sm3+is better than K2 SiF6:Mn4+phosphor.After soaking in deionized water for 300 min,the La3 Si6 N11:Sm3+sample retains approximately 80% of its initial relative emission intensity.When the temperature rises to 423 K（150℃）,the emission intensity of La2.99Si6 N11:0.01 Sm3+sample remains 85%in co mparison to that of room tempe rature.The activation energy was calculated to be 0.63253 eV,which is higher than those of Sm3+-activated oxide phosphors,indicating that the phosphor has relatively good thermal stability.
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