Journal Article

PUBDB-2026-02517

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Yb$^{3+}$ -Doped GaN Nanoceramics as a New Material for Broad Band White Light Emission

Musialek, A. (Corresponding author)Extern* ; Tomala, R. ; Gagliardo Briuccia, G. E.Extern* ; Strek, W.

2026
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.6c00934  doi:10.3204/PUBDB-2026-02517

Abstract: The effect of grain boundary defects on the optoelectronic properties of Yb3+-doped GaN nanoceramics was investigated. Structural analysis confirmed crystallization in the wurtzite structure, with a maximum concentration of Yb3+ up to 3%. Optical spectroscopy in the visible range allowed us to confirm the defect nature of the obtained materials, and VUV measurements confirmed the presence of deep surface defects, which are active recombination centers for broad band white light emission. In the NIR range, the characteristic emission of the f–f Yb3+ transitions was confirmed, as well as energy transfer between the Yb3+ ions and the host. Laser-induced white emission (LIWE) was observed after irradiation with CW NIR laser diode in vacuum, revealing the excitation threshold and nonlinearity with increasing laser power density. The emission process was accompanied by efficient photoconductivity. The defined hysteresis contrast reaches a maximum of over 65% for undoped GaN, while the introduction of Yb3+ ions reduces the hysteresis, or optical capacitance, reaching a minimum value of almost 23% for the 3% Yb3+ sample. The obtained results clearly demonstrate that the obtained nanoceramics can behave as optically controllable memristive-like systems.

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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-20250367 (I-20250367) (I-20250367)
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 ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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