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Lanthanide-doped fl...
Lanthanide-doped fluoride core/multishell nanoparticles for broadband upconversion of infrared light
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Shao, W. (author)
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Chen, G. (author)
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Ohulchanskyy, T. Y. (author)
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Kuzmin, A. (author)
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Damasco, J. (author)
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Qiu, H. (author)
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Yang, C. (author)
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- Ågren, Hans (author)
- KTH,Teoretisk kemi och biologi
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Prasad, P. N. (author)
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(creator_code:org_t)
- 2014-11-11
- 2015
- English.
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In: Advanced Optical Materials. - : Wiley. - 2195-1071. ; 3:4, s. 575-582
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The authors introduce a novel multilayer core/shell design to broadly upconvert infrared (IR) light at many discrete wavelengths into visible or near-IR (NIR) emissions. It utilizes hexagonal-phase core/multishell NaYF4:10%Er3+@NaYF4@NaYF4:10%Ho3+@NaYF4@NaYF4:1%Tm3+@NaYF4 nanoparticles, where the active core as well as each active shell upconvert a distinct set of IR wavelength. The inert NaYF4 layers in between these upconverting domains efficiently suppress the detrimental cross-relaxation processes between different types of lanthanide ions, thus yielding about two times more efficient upconversion photoluminescence than the counterpart NaYF4:10%Er3+@NaYF4:10%Ho3+ @NaYF4:1%Tm3+@NaYF4 without the inert NaYF4 layers, and about one order of magnitude higher than the core/shell NaYF4:10%Er3+, 10%Ho3+, 1%Tm3+@NaYF4 nanoparticles without spatially isolating the Er3+, Ho3+, and Tm3+ ions. These core/multishell nanoparticles can be excited at ≈1120-1190 nm (due to Ho3+), ≈1190-1260 nm (due to Tm3+), and ≈1450-1580 nm (due to Er3+), collectively covering a broad spectral range of about 270 nm in the IR range that can be very useful for IR photosensitization of solar cells.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- Core/shell
- Cross-relaxation
- Lanthanide elements
- Nanoparticles
- Solar materials
- Upconversion
Publication and Content Type
- ref (subject category)
- art (subject category)
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