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Inne
Blue-to-NIR energy transfer for bifunctional application in indoor agriculture and high-temperature luminescent thermometry
Autorzy
Rok wydania
2025
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
1039
Strony
183250/1-183250/11
DOI
10.1016/j.jallcom.2025.183250
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
We report on a novel series of multifunctional luminescent materials based on a Mg2Al4Si5O18 aluminosilicate host doped with Ce3 + and co-doped with Cr3+ ions, synthesized via a sol-gel route. The synthesized phosphors exhibit broadband blue emission originating from the parity-allowed 5d → 4 f transitions of Ce3+, efficiently converted into narrow red/NIR emission from spin-forbidden 2E → 4A2 transitions of Cr3+ via an efficient Ce3+ → Cr3+ energy transfer mechanism. This emission profile, highly matched to the absorption bands of key plant photoreceptors (chlorophylls, carotenoids, and phytochromes), makes the material highly suitable for agricultural LED lighting applications. The optimized co-doping strategy enables energy transfer efficiencies up to 54 % and photoluminescence quantum yields reaching 41 %, establishing these phosphors as promising candidates for UV-excited LEDs for plant growth. Beyond lighting, the material demonstrates excellent performance as an optical luminescent thermometer. Temperature-dependent studies reveal high relative sensitivities of 0.51 %·K⁻1 (525 K) and 0.97 %·K⁻1 (497 K) based on emission intensity ratios and lifetime measurements, respectively. The thermometric function enables in situ, non-contact temperature sensing of illuminated plant tissues, addressing critical needs in precision agriculture. The simultaneous presence of Ce3+-based blue emission and Cr3+-centered red/NIR luminescence, facilitated by efficient energy transfer between the dopants, highlights the potential of Mg2Al4Si5O18: Ce3+, Cr3+ for dual-use in plant-targeted LED lighting and optical temperature sensing.
Słowa kluczowe
Aluminosilicates, Ce3+ ions, Cr3+ ions, Energy transfer, Luminescence thermometry, Plant growth, Indoor agriculture
Adres publiczny
http://dx.doi.org/10.1016/j.jallcom.2025.183250
Strona internetowa wydawcy
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