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Issue 5, 2012
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Green-emitting phosphor Na2Gd2B2O7:Ce3+, Tb3+ for near-UV LEDs

Chongfeng Guo,*a  Heng Jinga  and  Ting Lia 
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* Corresponding authors

a National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Institute of Photonics & Photon-Technology and Department of Physics, Northwest University, China
E-mail: gcfzsu@yahoo.com.cn

Abstract

An intense green-emitting phosphor Na2Gd2B2O7:Ce3+, Tb3+ is developed on the basis of the highly efficient energy transfer from Ce3+ to Tb3+. The photoluminescence emission and excitation spectra, the lifetime, and the effect of Tb3+ concentration are investigated in detail. Results confirm the occurrence of non-radiative energy transfer from Ce3+ to Tb3+ with an efficiency of over 80%. The intensity ratio of blue emission from Ce3+ and green emission from Tb3+can be tuned by adjusting their concentrations. The enhanced photoluminescence of Tb3+ with sharp emission lines could be obtained by the broad band excitation peak at about 360 nm from the allowed 4f–5d absorption of Ce3+ ions. The results suggest that the phosphor Na2Gd2B2O7:0.05Ce3+, 0.12Tb3+ with the optimal composition could potentially be used for near ultraviolet light-emitting diodes (n-UV LEDs).

Graphical abstract: Green-emitting phosphor Na2Gd2B2O7:Ce3+, Tb3+ for near-UV LEDs

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Publication details

The article was received on 28 Sep 2011, accepted on 05 Dec 2011 and first published on 18 Jan 2012


Article type: Paper
DOI: 10.1039/C2RA00808D
Citation: RSC Adv., 2012,2, 2119-2122
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    Green-emitting phosphor Na2Gd2B2O7:Ce3+, Tb3+ for near-UV LEDs

    C. Guo, H. Jing and T. Li, RSC Adv., 2012, 2, 2119
    DOI: 10.1039/C2RA00808D

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