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Indexed by:期刊论文

Date of Publication:2015-11-11

Journal:JOURNAL OF MODERN OPTICS

Included Journals:SCIE、EI、Scopus

Volume:62

Issue:19

Page Number:1638-1642

ISSN No.:0950-0340

Key Words:Dy3+; Yb3+ ions; oxyfluoride glass ceramics; indirect sensitization; white light emission

Abstract:Dy3+-doped and Dy3+:Yb3+-codoped oxyfluoride glass ceramics have been prepared by high-temperature solid phase sintering method. The micrographs of scanning electron microscope show that a lot of nanorods are formed on the surface of Dy3+:Yb3+-codoped sample. The excitation spectra and emission spectra are measured, respectively, and intense photoluminescence peaks at 482 and 575nm corresponding to the transitions of Dy3+ ions are found in single-doped samples under 388-nm excitation. For Dy3+:Yb3+-codoped oxyfluoride glass ceramics, the intensities at blue and green bands become weaker whereas the intensity at 695nm gets stronger. The indirect sensitization is detailedly discussed and Commission Internationale de lE-clairage chromaticity coordinates exhibit that two kinds of oxyfluoride glass ceramics are available candidates for the solid-state white light emission.