摘要
The influence of silver nanoparticles on Er3＋ up-conversion in CaF2 precipitated oxyfluoride glass-ceramics is investigated. After heat-treatments, transmission electron microscopy images show that CaF2 nano- crystals precipitate in the glass matrix uniformity, and sliver nanoparticles are spread around the CaF2 nano-crystals simultaneously. Comparing with the samples without Ag doped, high efficiency up-conversion luminescences of Er3＋ at 540 and 658 nm are distinctly observed in the silver nanopartieles containing glass-ceramics by the 980-nm excitation. Moreover, since the intensity ratio of green and red emissions changes after silver nanopartieles precipitation, the up-conversion mechanism of Er3＋ is discussed.
The influence of silver nanoparticles on Er3＋ up-conversion in CaF2 precipitated oxyfluoride glass-ceramics is investigated. After heat-treatments, transmission electron microscopy images show that CaF2 nano- crystals precipitate in the glass matrix uniformity, and sliver nanoparticles are spread around the CaF2 nano-crystals simultaneously. Comparing with the samples without Ag doped, high efficiency up-conversion luminescences of Er3＋ at 540 and 658 nm are distinctly observed in the silver nanopartieles containing glass-ceramics by the 980-nm excitation. Moreover, since the intensity ratio of green and red emissions changes after silver nanopartieles precipitation, the up-conversion mechanism of Er3＋ is discussed.
基金
the National Natural Science Foundation of China(Nos.61265004,51272097,and 61307111)
the Nature and Science Fund from Yunnan Province Ministry of Education(No.2011C13211708)
