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国家自然科学基金(2010ZC038)

作品数:3 被引量:2H指数:1
发文基金:国家自然科学基金中国博士后科学基金国家重点基础研究发展计划更多>>
相关领域:理学化学工程更多>>

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Upconversion luminescence and color tunable properties in Yb-Tb codoped Ca_(0.15)Zr_(0.85)O_(1.85) inverse opal
2012年
The upconversion (UC) luminescence and color tunable properties of Tb3+ ions were investigated by steady spectral under 980 LD excitation in the Cao.15ZrO.8501.85:Yb,Tb inverse opals fabricated by the self-assembly technique in combination with a sol-gel method. The inhibition of UC emission was inspected if the Tb3+ UC emission band was in the regions of the photonic bandgap, while enhancement of the UC emission occurred if the UC emission band located at the edge of the bandgap. Color modification of the UC emission was successfully obtained by the suppression or enhancement effect of the photonic band gap on the UC emission.
李俊杨朝宁杨正文严冬吴航俊廖佳燕邱建备宋志国杨勇周大成
关键词:UPCONVERSION
Preparation and upconversion luminescence properties of Tb3+-Yb3+ co-doped phosphate inverse opals
Upconversion(UC) luminescence photonic band gap materials Tb-Yb co-doped phosphate inverse opal photonic cryst...
Kan Zhu~(1,a),Zhengwen Yang~(1,b),Dong Yan~1,Zhiguo Song~1,Dacheng Zhou ~1,Rongfei Wang~1, and Jianbei Qiu~(1,c) 1 Key Lab of Advanced Materials in Rare & Precious and Non-ferrous Metals,Ministry of Education,Key Laboratory of Advanced Materials of Yunnan Province,College of materials science and engineering,Kunming University of Science and Technology,Xuefu RD,Kunming,650093,China
关键词:PHOSPHATE
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Investigation of the mechanism of upconversion luminescence in Er^(3+)/Yb^(3+) co-doped Bi_2Ti_2O_7 inverse opal
2013年
Three-dimensional-ordered Yb/Er co-doped Bi2Ti207 inverse opal, powder, and disordered reference sam- ples are prepared and their upconversion (UC) emission properties and mechanisms are investigated. Sig- nificant suppression of UC emission is detected when the photonic band-gaps overlap with Er3+ UC green emission bands. Interestingly, green and red UC emissions follow a two-photon process in the powder sample but a three-photon one in the inverse opal.
严冬杨正文廖佳燕吴航俊邱建备宋志国周大成杨勇尹兆益
关键词:YBBI
Up-conversion of Er^(3+)/Yb^(3+)co-doped transparent glass-ceramics containing Ba_2LaF_7 nanocrystals被引量:2
2013年
The up-conversion of Er3+/yb3+ co-doped transparent glass-ceramics 50SiO2-10A1F3-5TiO2-30BaF2-4LaF3-0.5ErF3-0.5YbF3 containing Ba2LaF7 nanocrystals under the changing of heat treatment temperature and time were investigated. The Ba2LaF7 nanocrystals precipitated from the glass matrix was confirmed by X-ray diffraction (XRD). The structural investigation carried out by XRD and trans- mission electron microscopy (TEM) evidenced the formation of cubic Ba2LaF7 nanocrystals with crystal size of about 14 nm. Comparing with the samples before heat treatment, the high efficiency up-conversion emission of Er3+/Yb3+ co-doped samples was observed in the glass-ceramics under 980 nm laser diode excitation. The increase in red emission intensity bands was stronger than the green bands when the crystal size increased. The mechanism for the up-conversion process in the glass-ceramics and the reasons for the increase of Er3+/yb3+ co-doped up-conversion intensity after heat treatment were discussed.
胡金民周大成王荣飞陈明厚焦清余雪邱建备
关键词:UP-CONVERSIONNANOCRYSTALSGLASS-CERAMICS
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