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Updated: Jun 17, 2026

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
Published on: November 15, 2016
Substitution of oxygen by fluorine in the GdSr2AlO5:Ce3+ phosphors: Gd1-xSr2+xAlO5-xFx solid solutions for solid
Won Bin Im1, Yoann Fourré, Stuart Brinkley
1Solid State Lighting and Energy Center, Materials Department, University of California, Santa Barbara, CA 93106, USA. imwonbin@mrl.ucsb.edu
Abstract:
Solid solutions between two isotypic host compounds: GdSr(2)AlO(5) and Sr(3)AlO(4)F; Gd(1-x)Sr(2+x)AlO(5-x)F(x):Ce(3+) (GSAF:Ce(3+)), have been prepared across the complete solid solution range x. Depending on x, the series display considerable optical tunability of emission wavelengths in the range 574 nm to 474 nm, which is attributed to the decreased crystal field splitting arising from increased host ionicity with fluorine addition. Applying the GSAF:Ce(3+) phosphors on InGaN LEDs (lambda (max) = 405 nm and 450 nm) permits white lighting sources to be prepared. The characteristics of these are reported.
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