Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films

Harish Lakhotiya; Søren Peder Madsen; Søren Roesgaard Nielsen; Joakim Vester-Petersen; Bo Brummerstedt Iversen; Peter Balling; Brian Julsgaard

doi:10.1021/acs.jpcc.0c05179

Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films

Harish Lakhotiya, Søren Peder Madsen, Søren Roesgaard Nielsen, Joakim Vester-Petersen, Bo Brummerstedt Iversen, Peter Balling, Brian Julsgaard^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

4 Citations (Scopus)

Abstract

We present the synthesis of Er-doped NaYF4/NaLuF4 core/shell nanocrystal films, which enable optical upconversion of photons from a wavelength of 1500 nm into photons of a wavelength of 980 nm. Combining such films with specially tailored Au nanostructures and a Au back-reflector, it is demonstrated that the upconversion luminescence yield can be enhanced up to 31 ± 3 times and that the performance of the upconverting layer can be modeled well for a broad range of excitation conditions. In particular, the analysis shows that the performance of the Au structures corresponds to a solar concentration factor of 4.1 ± 0.6. The relevance of the results for improving the performance of crystalline silicon solar cells is discussed.

Original language	English
Journal	The Journal of Physical Chemistry Part C
Volume	124
Issue	41
Pages (from-to)	22357–22365
Number of pages	9
ISSN	1932-7447
DOIs	https://doi.org/10.1021/acs.jpcc.0c05179
Publication status	Published - 15 Oct 2020

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10.1021/acs.jpcc.0c05179

https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.0c05179

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title = "Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films",

abstract = "We present the synthesis of Er-doped NaYF4/NaLuF4 core/shell nanocrystal films, which enable optical upconversion of photons from a wavelength of 1500 nm into photons of a wavelength of 980 nm. Combining such films with specially tailored Au nanostructures and a Au back-reflector, it is demonstrated that the upconversion luminescence yield can be enhanced up to 31 ± 3 times and that the performance of the upconverting layer can be modeled well for a broad range of excitation conditions. In particular, the analysis shows that the performance of the Au structures corresponds to a solar concentration factor of 4.1 ± 0.6. The relevance of the results for improving the performance of crystalline silicon solar cells is discussed.",

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doi = "10.1021/acs.jpcc.0c05179",

language = "English",

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journal = "The Journal of Physical Chemistry Part C",

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publisher = "American Chemical Society",

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Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films. / Lakhotiya, Harish; Madsen, Søren Peder; Nielsen, Søren Roesgaard et al.
In: The Journal of Physical Chemistry Part C, Vol. 124, No. 41, 15.10.2020, p. 22357–22365.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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T1 - Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films

AU - Lakhotiya, Harish

AU - Madsen, Søren Peder

AU - Nielsen, Søren Roesgaard

AU - Vester-Petersen, Joakim

AU - Iversen, Bo Brummerstedt

AU - Balling, Peter

AU - Julsgaard, Brian

PY - 2020/10/15

Y1 - 2020/10/15

N2 - We present the synthesis of Er-doped NaYF4/NaLuF4 core/shell nanocrystal films, which enable optical upconversion of photons from a wavelength of 1500 nm into photons of a wavelength of 980 nm. Combining such films with specially tailored Au nanostructures and a Au back-reflector, it is demonstrated that the upconversion luminescence yield can be enhanced up to 31 ± 3 times and that the performance of the upconverting layer can be modeled well for a broad range of excitation conditions. In particular, the analysis shows that the performance of the Au structures corresponds to a solar concentration factor of 4.1 ± 0.6. The relevance of the results for improving the performance of crystalline silicon solar cells is discussed.

AB - We present the synthesis of Er-doped NaYF4/NaLuF4 core/shell nanocrystal films, which enable optical upconversion of photons from a wavelength of 1500 nm into photons of a wavelength of 980 nm. Combining such films with specially tailored Au nanostructures and a Au back-reflector, it is demonstrated that the upconversion luminescence yield can be enhanced up to 31 ± 3 times and that the performance of the upconverting layer can be modeled well for a broad range of excitation conditions. In particular, the analysis shows that the performance of the Au structures corresponds to a solar concentration factor of 4.1 ± 0.6. The relevance of the results for improving the performance of crystalline silicon solar cells is discussed.

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DO - 10.1021/acs.jpcc.0c05179

M3 - Journal article

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SP - 22357

EP - 22365

JO - The Journal of Physical Chemistry Part C

JF - The Journal of Physical Chemistry Part C

IS - 41

ER -

Improving Upconversion Efficiency by Photon Management in Self-Assembled Core/Shell Nanocrystal Films

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