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Luminescence properties of newly developed red-emitting phosphors M2Si2O7:Eu3+ (M=La, Y) under UV/VUV excitation

Published online by Cambridge University Press:  01 February 2011

Zhiya Zhang  and
Yuhua Wang
Zhiya Zhang
Affiliation:
zhangzhiy04@st.lzu.edu.cnDepartment of Material Science, School of Physical Science and Technology, Lanzhou UniversityNo.222 South Tianshui RoadLanzhou Gansu 730000China, People's Republic of
Yuhua Wang
Affiliation:
wyh@lzu.edu.cn, Department of Material Science, School of Physical Science and Technology, Lanzhou University, No.222 South Tianshui Road, Lanzhou, Gansu, 730000, China, People's Republic of
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Abstract

The red-emitting phosphors of Eu3+ doped M2Si2O7 (M=La, Y) were synthesized by a solid-state reaction method and their luminescence properties in UV-VUV region have been studied. On the excitation spectra, the Eu3+-O2- CT band is of higher intensity for La2Si2O7, while for Y2Si2O7, the absorption around 150nm is much stronger and this can be assigned to the Y3+-O2- CT band in company with the Si-O group absorption. The emission spectra show higher intensity and better color purity for La2Si2O7:Eu3+ under 254nm excitation due to Eu3+ occupying the non-centrosymmetric site. Under 147nm excitation, Y2Si2O7:Eu3+ exhibits stronger emission with purer red, which can be corresponded to the absorption of Y3+-O2- CT in the VUV region.

Keywords

luminescenceoptical propertiesEu
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 916: Symposium DD – Solid-State Lighting Materials and Devices , 2006 , 0916-DD02-06
Copyright
Copyright © Materials Research Society 2006

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