Fine controllable blue emission and its mechanism in Ce3+-doped orthosilicate solid solution phosphors for different plant growths
来源期刊：JOURNAL OF RARE EARTHS2018年第11期
论文作者：Yaru Yang Yiting Lin Yue Han Zhongxian Qiu Wenli Zhou Jilin Zhang Chengzhi Li Liping Yu Shixun Lian
文章页码：1150 - 1156
摘 要：The designed Ce3+-doped alkaline-earth silicate phosphors CamSr2-m-nBanSiO4:Ce3+,Li+(CSBS:Ce3+)were synthesized by a high temperature solid-state reaction. The crystal field splitting and the centroid shift from the free ion energy of 5 d configuration were approximated from the spectrum for Ca2SiO4,Sr2SiO4 and Ba2SiO4 phosphors. The single-phase purity was checked by means of X-ray diffraction. Here,when the doped concentration of Ca2+ is less than 80%（m ≤1.6）, we report the structural phase transformation from monoclinic system β-Ca2SiO4 to orthorhombic system α-Ca2SiO4. The phosphors excited by near-ultraviolet（NUV） light at wavelengths ranging from 200 to 400 nm demonstrate a broad asymmetric blue emission band. The emission peak wavelength redshifts firstly from 417 nm of Ca2SiO4 to 438 nm of Sr0.3Ca1.6SiO4, and then blueshifts to 411 nm of Sr2SiO4, and the end of 401 nm of Ba2SiO4.These results indicate that the tunable blue-emission of the phosphors can be realized through changing the solid solution components, which has a potential use as a blue component for fabricated precision modulation LEDs light sources and auxiliaries of SSC plastics films for different plant growths.We discuss in detail the possible mechanism and energy diagram of the tunable blue luminescence in CamSr2-m-nBanSiO4:Ce3+,Li+ phosphors.
Yaru Yang，Yiting Lin，Yue Han，Zhongxian Qiu，Wenli Zhou，Jilin Zhang，Chengzhi Li，Liping Yu，Shixun Lian
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education),Key Laboratory of Sustainable Resources Processing and Advanced Materials of Hunan Province,College of Chemistry and Chemical Engineering,Hunan Normal University
摘 要：The designed Ce3+-doped alkaline-earth silicate phosphors CamSr2-m-nBanSiO4:Ce3+,Li+(CSBS:Ce3+)were synthesized by a high temperature solid-state reaction. The crystal field splitting and the centroid shift from the free ion energy of 5 d configuration were approximated from the spectrum for Ca2SiO4,Sr2SiO4 and Ba2SiO4 phosphors. The single-phase purity was checked by means of X-ray diffraction. Here,when the doped concentration of Ca2+ is less than 80%（m ≤1.6）, we report the structural phase transformation from monoclinic system β-Ca2SiO4 to orthorhombic system α-Ca2SiO4. The phosphors excited by near-ultraviolet（NUV） light at wavelengths ranging from 200 to 400 nm demonstrate a broad asymmetric blue emission band. The emission peak wavelength redshifts firstly from 417 nm of Ca2SiO4 to 438 nm of Sr0.3Ca1.6SiO4, and then blueshifts to 411 nm of Sr2SiO4, and the end of 401 nm of Ba2SiO4.These results indicate that the tunable blue-emission of the phosphors can be realized through changing the solid solution components, which has a potential use as a blue component for fabricated precision modulation LEDs light sources and auxiliaries of SSC plastics films for different plant growths.We discuss in detail the possible mechanism and energy diagram of the tunable blue luminescence in CamSr2-m-nBanSiO4:Ce3+,Li+ phosphors.
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