Optical Properties of Lu3Al5O12:Ce(Er) nanocrystals

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Optical Properties of Lu3Al5O12:Ce(Er) nanocrystals

Popis výsledku v původním jazyce

Lutetium aluminum garnet (LuAG) is the crystal well known for extraordinary useful for building highly efficient laser devices or ionizing radiation detectors. To design the most favorable physical properties, different dopants and synthesis methods are constantly developed, primarily focused on advantages of single-crystals. However, downscaling of the luminescent materials to nanosize also creates additional benefits of increased surface to volume ratio and thus, the efficiency of luminescence can be improved. Therefore, the aim of this work is to compare influence of Ce and Er doping on optical properties of LuAG nanogarnets. Synergy of methods like X-ray diffraction (XRD), Raman, photoluminescence (PL) and photothermal deflection spectroscopies (PDS) were applied to the newly synthesized LuAG:Ce(Er) nanopowders. In particular, the pure LuAG shows only negligible PL around 625 and 650 nm originating from accidental defects. The LuAG:Ce nanocrystals emits at 450 and 650 nm. The former wavelength corresponds to the cerium typical 5d-4f transition. LuAG:Er has 5 peaks in infrared PL spectrum around 1460, 1530, 1580, 1620 and 1660 nm which are commonly known Er3+ transitions between Stark levels. According to XRD, the materials are pure phase garnets.

Název v anglickém jazyce

Optical Properties of Lu3Al5O12:Ce(Er) nanocrystals

Popis výsledku anglicky

Lutetium aluminum garnet (LuAG) is the crystal well known for extraordinary useful for building highly efficient laser devices or ionizing radiation detectors. To design the most favorable physical properties, different dopants and synthesis methods are constantly developed, primarily focused on advantages of single-crystals. However, downscaling of the luminescent materials to nanosize also creates additional benefits of increased surface to volume ratio and thus, the efficiency of luminescence can be improved. Therefore, the aim of this work is to compare influence of Ce and Er doping on optical properties of LuAG nanogarnets. Synergy of methods like X-ray diffraction (XRD), Raman, photoluminescence (PL) and photothermal deflection spectroscopies (PDS) were applied to the newly synthesized LuAG:Ce(Er) nanopowders. In particular, the pure LuAG shows only negligible PL around 625 and 650 nm originating from accidental defects. The LuAG:Ce nanocrystals emits at 450 and 650 nm. The former wavelength corresponds to the cerium typical 5d-4f transition. LuAG:Er has 5 peaks in infrared PL spectrum around 1460, 1530, 1580, 1620 and 1660 nm which are commonly known Er3+ transitions between Stark levels. According to XRD, the materials are pure phase garnets.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů