Journal Article

PUBDB-2025-04522

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhanced UVC upconversion luminescence in Pr$^{3+}$-doped eulytite-type phosphates

Grippa, A. (Corresponding author) ; Rebrova, N.Extern* ; Zdeb-Stańczykowska, P.Extern* ; Dereń, P. J.

2025
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jlumin.2025.121541

Abstract: UVC radiation's strong antiseptic properties make it ideal for water and surface decontamination, underscoring the need for new UVC-generating materials. In this work, Pr3+-doped Ba3La(PO4)3 and Ba2.5La1.5(PO4)2.5(SiO4)0.5 phosphors were synthesized via the Pechini method, and their structural and luminescent properties were investigated. Both compounds crystallize in a cubic eulytite-type structure and exhibit stronger 1D2 → 3H4 (575–645 nm) emission than the 3P0 → 3H4 (465–505 nm) transition. Under UV excitation, efficient 5d–4f emission is observed, while 444 nm laser excitation induces UVC upconversion via a two-photon process dominated by excited-state absorption (ESA). Optimal upconversion occurs at 1.5 % Pr3+ doping, with Ba2.5La1.5(PO4)2.5(SiO4)0.5 showing ∼30 % higher intensity than Ba3La(PO4)3 due to enhanced local disorder and crystal field effects. These materials outperform YPO4:Pr3+ phosphate in upconversion emission, highlighting their potential for use in UVC-emitting devices.

Note: I attached the only pdf files I have (corrected proof and with pages). I am a corresponding author and do not have any other pdf. Also I have an application draft pdf.

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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-20240170 EC (I-20240170-EC) (I-20240170-EC)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2025

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

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