Publication Date:
2017-02-14
Description:
Sr 2 Al 6 O 11 :Eu 2+ ,Dy 3+ is known as a high efficient material for generating persistent luminescence. Due to its low structural stability, it is a challenge to prepare such orthorhombic material in large scale. In this work, a facile and effective strategy was designed for the preparation of Sr 2 Al 6 O 11 :Eu 2+ ,Dy 3+ with high purity by combining the advantages of solid state reaction and chemical vapor deposition method. The prepared Sr 2 Al 6 O 11 :Eu 2+ ,Dy 3+ could effectively store the UV light energy and emit blue-green luminescence for 240 min by slow liberation of photo-excited electrons. Its blue-green afterglow was composed of two luminescent emissions which released from the Eu centers located in different crystal fields.
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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