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Synthesis, structure and luminescent properties of yellow phosphor La3Si6N11 :Ce^3+ for high power white-LEDs
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作者 Fu Du Weidong Zhuang +5 位作者 Ronghui Liu Yuanhong Liu Wei Gao Xia Zhang Yuan Xue Hongrui Hao 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2017年第11期1059-1064,共6页
A series of high phase purity blue light excitable yellow-emitting La3_xSi6Nu:xCe~+ phosphors weresynthesized by the high temperature solid state reactions method. The structure and luminescentproperties were invest... A series of high phase purity blue light excitable yellow-emitting La3_xSi6Nu:xCe~+ phosphors weresynthesized by the high temperature solid state reactions method. The structure and luminescentproperties were investigated. The phase structure was studied by means of X-ray diffraction, structuresrefinements and energy dispersive X-ray spectroscopy. The phosphors effectively excited by the light of450 nm and show intense yellow emission at 535 nm with FWHM of 115 nm corresponding to the5d → 2F5/2 and 5d → 2F7/2 transitions of Ce3+. In addition, the optimized La2.86Si6Nn :0.14Ce3+ exhibits aweak thermal quenching, which remains 98.2% of the initial emission intensity when heated to 200 ℃,the thermal quenching properties exhibit a modest decline when the temperature returned to roomtemperature. The above results indicate that La3Si6Nu:Ce3+ can be regarded as a high promisingphosphor for applications in high power white-light LED. 展开更多
关键词 High phase purityLa3Si6Nll :Ce3+Small thermal quenchingHigh power WHITE-LIGHT LED
Luminescent properties of Ce3+,Er3+ co-doped La3Si6N11
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作者 Yuan Xue Ronghui Liu +5 位作者 Yuanhong Liu Huibing Xu Guantong Chen Xia Zhang Wei Gao Ze Jiang 《中国稀土学报:英文版》 SCIE EI CAS CSCD 2019年第3期248-252,共5页
In order to obtain near-infrared phosphor pumped by blue chip with high luminous efficiency, a novel near-infrared phosphor Ce3+/Er3+ doped La3Si6N11 was designed and firstly prepared via conventional solid-state reac... In order to obtain near-infrared phosphor pumped by blue chip with high luminous efficiency, a novel near-infrared phosphor Ce3+/Er3+ doped La3Si6N11 was designed and firstly prepared via conventional solid-state reactions. The structure and morphology of Ce3+/Er3+ doped La3Si6N11 were investigated by X-ray diffraction(XRD) and scanning electron microscopy(SEM). Compared with Er3+ doped La3Si6N11,the emission intensity of the Ce3+, Er3+ co-doped phosphor can be increased more than 5 times.Meanwhile, the mechanism of energy transfer from Ce3+ to Er3+ is confirmed according to the excitation,emission spectra and decay lifetimes curve. Above results suggest that La3 Si6 N11:Ce3+,Er3+ is a promising near-infrared phosphor for blue pumped LEDs(light-emitting diodes). 展开更多
关键词 Solid state reaction Energy transfer NEAR-INFRARED PHOSPHOR La3Si6N11:Ce3+ ER3+ Rare earths
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