期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 180, 期 -, 页码 79-84出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2017.03.005
关键词
Photoluminescence; Vibrational analysis; Nanophosphor; Lanthanide elements
类别
资金
- Haryana State Council for Science Technology [HSCST/2015/1]
- Science and Engineering Research Board, New Delhi [SB/FTP/PS-093/2013]
A series of Dy3+ ion activated Bi2SiO5 nanophosphors were synthesized by the hydrothermal and coprecipitation methods. Various structural and optical characterizations were made using X-ray diffraction, Scanning and Transmission electron microscopy, UV-Visible-Infrared absorption, Raman Spectroscopy, Photoluminescence, Time resolved luminescence techniques etc. Dy3+ ion doped samples yields characteristic bright yellow and blue emissions, on resonant excitation with 349 nm and 386 nm. The intensity ratio of the yellow/blue peaks was found to be function of Dy ion concentration and synthesis method. We have achieved white colour emission at 1.5 mold Dy concentration, CIE coordinate (0.36, 0.4) of which fall well within gamut of white light. The time-resolved fluorescence reveals decrease in radiative lifetime values with increasing Dy3+ ions concentration. A comparison between the samples synthesized by different methods, and Dy ion concentrations has been made and detail photo-physics involved is presented in the article. (C) 2017 Elsevier B.V. All rights reserved.
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