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Optical Functionalization of Cryolite Polycrystals Using Transition Metal/Rare Earth Ions for the Application of Lighting and Biological Imaging
Başlık:
Optical Functionalization of Cryolite Polycrystals Using Transition Metal/Rare Earth Ions for the Application of Lighting and Biological Imaging
Yazar:
Zhou, Yuanshu, author.
ISBN:
9780438107373
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (67 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Özet:
Cryolite (Na3AlF6) was assumed to be a promising luminescent host for near-infrared photon emission with transition metal (TM)/rare earth (RE) ions as dopants. Micron cryolite samples were obtained through hydrothermal reaction, while nanocrystals were synthesized via solvothermal reaction. It is demonstrated that RE3+ ions having large radii cannot be doped into Na3AlF6 host lattice by replacing Al3+ sites that with smaller radius. TM ions(TM=Mn2+ , Ni2+, Cr3+, Fe3+) are successfully doped into Na3AlF6 with substitution of Al3+ sites, while the Cr3+ doped Na3AlF 6 exhibited broad efficient deep-red emission at ~720 nm. A systematic study of luminescence intensity versus Cr3+ concentration was explored to obtained the optimized cryolite phosphor. Energy decay dynamics was systematically analyzed on the basis of theoretical model and experimental data. Heat-treated micron phosphor and Na3AlF6:60mol%Cr 3+ Na3AlF6 nanoparticles were proved to have efficient luminescence, which create big chance for advanced red/far-red light-emitting diodes (LEDs) and specific application like bioimaging in vivo.
Notlar:
School code: 0190
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(696456.1) | 696456-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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