Jump to main content
Jump to site search

Issue 22, 2018
Previous Article Next Article

An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission

Author affiliations

Abstract

Green phosphors codoped with Ce3+ and Tb3+ have been studied extensively for application in UV-based white LEDs, but only few of them show both high luminescence efficiency and thermal stability. This study reports a new green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 prepared by a solid-state reaction. Emission color tuning from blue to green was studied as a function of Tb3+ concentration under UV excitation and well-described based on energy transfer from Ce3+ to Tb3+. The Tb3+ emission endowed the green phosphor with a high quantum yield of 86%, and a high thermal stability over the 303–483 K range was achieved. A model has been proposed to explain a general phenomenon observed in Ce3+ and Tb3+-codoped phosphors that Tb3+ emission is thermally more stable than the Ce3+ emission. A relationship between the temperature dependencies of Tb3+ and Ce3+ emissions was obtained in connection with room temperature energy transfer efficiency. The thermally stable Tb3+ emission was well-predicated using the obtained relationship. The new phosphor was employed for fabricating a UV-based white LED. A high color-rendering index of 91.4 at a low correlated color temperature of 3809 K is obtained, indicating promising application of Ba2Lu5B5O17:Ce3+,Tb3+ in solid-state lighting.

Graphical abstract: An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission

Back to tab navigation

Publication details

The article was received on 07 Dec 2017, accepted on 27 Apr 2018 and first published on 30 Apr 2018


Article type: Paper
DOI: 10.1039/C7TC05614A
Citation: J. Mater. Chem. C, 2018,6, 5984-5991
  •   Request permissions

    An efficient green phosphor of Ce3+ and Tb3+-codoped Ba2Lu5B5O17 and a model for elucidating the high thermal stability of the green emission

    Y. Xiao, Z. Hao, L. Zhang, X. Zhang, G. Pan, H. Wu, H. Wu, Y. Luo and J. Zhang, J. Mater. Chem. C, 2018, 6, 5984
    DOI: 10.1039/C7TC05614A

Search articles by author

Spotlight

Advertisements