Adjustable Up-Conversion Luminescence Color in Rare Earth Co-Doped Transparent Oxyfluoride Nano-Glass-Ceramics

作者：Song, Zhiguo; Zhou, Dacheng; Qiu, Jianbei^*

来源：Journal of Nanoscience and Nanotechnology, 2010, 10(3): 1969-1973.

DOI：10.1166/jnn.2010.2069

• Nanocrystals
• Up-Conversion
• White-Light Luminescence
• Glass Ceramics
• Oxyfluoride Glass

Transparent oxyfluoride nano-glass-ceramics with highly efficient up-conversion and adjustable color luminescence were developed in the 28SiO(2) center dot 17Al(2)O(3) center dot 28PbF(2) center dot 22CdF(2) center dot 0.1NdF(3) center dot xYbF(3) center dot yHoF(3) center dot zTmF(3) center dot (4.9 - x - y - z)GdF3 composition, in mol%. X-ray diffraction and transmission electron microscopy measurements revealed that heat treatments of the oxyfluoride glasses cause the homogeneous precipitation of rare-earth ions co-doped fluorite-type PbxCd1-xF2 nanocrystals of about 10 nm in diameter in the glass matrix. Under single 808 nm laser excitation, intense red, green and blue up-conversion luminescences were simultaneously observed in these transparent nano-glass-ceramics owing to the successive energy transfer from Nd3+ ions to Ho3+ and Tm3+ via Yb3+ ions. Various colors of luminescence, including bright perfect white light, can be tuned by adjusting the concentrations of the Tm3+ ions in the material. A possible energy transfer process and up-conversion luminescence mechanism in the nano-glass-ceramics are proposed and discussed.

• 出版日期2010-3
• 单位昆明理工大学