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Multi-variable comp...
Multi-variable compensated quantum yield measurements of upconverting nanoparticles with high dynamic range : a systematic approach
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- Sekar, Sanathana Konugolu Venkata (författare)
- Tyndall National Institute
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- Matias, Jean S. (författare)
- Tyndall National Institute,University College Cork
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- Dumlupinar, Gokhan (författare)
- Tyndall National Institute,University College Cork
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- Niemitz, Lorenzo (författare)
- University College Cork,Tyndall National Institute
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- Mousavi, Monirehalsadat (författare)
- Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Komolibus, Katarzyna (författare)
- Tyndall National Institute
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- Andersson-Engels, Stefan (författare)
- University College Cork,Tyndall National Institute
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(creator_code:org_t)
- 2022
- 2022
- Engelska 13 s.
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Ingår i: Optics Express. - 1094-4087. ; 30:10, s. 16572-16584
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Non-linear materials such as upconverting nanoparticles (UCNPs) are emerging technology with fast-growing applications in various fields. The power density dependence of the emission quantum yield (QY) of these non-linear materials makes them challenging to characterize using currently available commercial QY systems. We propose a multimodal system to measure QY over a wide dynamic range (1:104), which takes into account and compensates for various distorting parameters (scattering, beam profile, inner filter effect and bandwidth of emission lines). For this, a beam shaping approach enabling speckle free beam profiles of two different sizes (530 µm or 106 µm) was employed. This provides low noise high-resolution QY curves. In particular, at low power densities, a signal-to-noise ratio of >50 was found. A Tm-based core-shell UCNP with excitation at 976 nm and emission at 804 nm was investigated with the system.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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