Journal Article

PUBDB-2026-02518

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Pr$^{3+}$ Activated NaY$_9$Si$_6$O$_{26}$ Nanophosphors With Tunable Visible Emission and High Thermal Stability for Solid-state Lightning

Periša, J. (Corresponding author) ; Kuzman, S. ; Ristić, Z.Extern* ; Pankratov, V.Extern* ; Dramićanin, T. ; Alodhayb, A. N. ; Antic, Z. (Corresponding author)Extern* ; Dramićanin, M. D.Extern*

2026
Springer Science + Business Media B.V. New York, NY

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Please use a persistent id in citations: doi:10.1007/s10895-026-04888-0

Abstract: NaY9Si6O26 nanoparticles with varying Pr3+ concentrations were synthesized by an alkaline hydrothermal process, yield-ing agglomerated spherical particles ∼55 nm in diameter with a hexagonal crystal structure. Emission spectra show thatthe intensity of UV 4f¹5d¹→4f² emissions is partially suppressed by efficient nonradiative relaxation, resulting in sharpvisible emissions from intraconfigurational Pr3+ 4f² transitions. The photoluminescence intensity increases with Pr³⁺ con-centration up to 0.2 mol%, where the strongest emission is observed, and then decreases at higher concentrations. Increas-ing the Pr³⁺ concentration also decreases the emission decay constant for both the 4f¹5d¹ and 4f² levels. These materialsexhibit excellent thermal and temporal stability, retaining ~ 95% of their room-temperature emission up to 150 °C andshowing no degradation over 400 min of continuous operation, underscoring their robustness. Prototype LED demonstra-tors fabricated with these phosphors show efficient color-tunable orange, yellow, and green emission, confirming strongcompatibility with commercial LED platforms and potential for solid-state lighting.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20250639 EC (I-20250639-EC) (I-20250639-EC)
3. NEPHEWS - NEutrons and PHotons Elevating Worldwide Science (NEPHEWS) (101131414) (101131414)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Springer ; DEAL Springer ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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