Improving the efficiency of solar cells by upconverting sunlight using field enhancement from optimized nano structures

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Improving the efficiency of solar cells by upconverting sunlight using field enhancement from optimized nano structures. / Balling, P.; Christiansen, J.; Christiansen, R. E.; Eriksen, Emil; Lakhotiya, H.; Mirsafaei, M.; Moller, S. H.; Nazir, A.; Vester-Petersen, J.; Jeppesen, B. R.; Jensen, P. B.; Hansen, J. L.; Ram, S. K.; Sigmund, O.; Madsen, M.; Madsen, S. P.; Julsgaard, B.

In: Optical Materials, Vol. 83, 09.2018, p. 279-289.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Bibtex

@article{e7b3921361604001ab41c480aacecf44,
title = "Improving the efficiency of solar cells by upconverting sunlight using field enhancement from optimized nano structures",
abstract = "Spectral conversion of the sunlight has been proposed as a method for enhancing the efficiency of photovoltaic devices, which are limited in current production by the mismatch between the solar spectrum and the wavelength range for efficient carrier generation. For example, the photo current can be increased by conversion of two low-energy photons (below the band gap of the absorber) to one higher-energy photon (i.e. upconversion). In this paper, we will review our ongoing activities aimed at enhancing such spectral-conversion processes by employing appropriately designed plasmonic nanoparticles. The nanoparticles serve as light-concentrating elements in order to enhance the non-linear upconversion process. From the theoretical side, we approach the optimization of nanoparticles by finite-element modelling of the plasmonic near fields in combination with topological optimization of the particle geometries. Experimentally, the nanostructures are formed by electron beam lithography on thin films of Er3+-containing transparent materials, foremost TiO2 made by radio-frequency magnetron sputtering, and layers of chemically synthesized NaYF4 nanoparticles. The properties of the upconverter are measured using a variety of optical methods, including time-resolved luminescence spectroscopy on erbium transitions and spectrally resolved upconversion-yield measurements at similar to 1500-nm-fight excitation. The calculated near-field enhancements are validated using a technique of near-field-enhanced ablation by tunable, ultrashort laser pulses.",
keywords = "Upconversion, Photovoltaics, Plasmonic enhancement, ELECTRON-BEAM LITHOGRAPHY, UP-CONVERSION LUMINESCENCE, OPTICAL NEAR-FIELD, DIMENSIONAL PHOTONIC CRYSTALS, PROXIMITY EFFECT CORRECTION, TOPOLOGY OPTIMIZATION, PHOTOVOLTAIC APPLICATIONS, GOLD NANOPARTICLES, SURFACE-PLASMONS, EPITAXIAL-GROWTH",
author = "P. Balling and J. Christiansen and Christiansen, {R. E.} and Emil Eriksen and H. Lakhotiya and M. Mirsafaei and Moller, {S. H.} and A. Nazir and J. Vester-Petersen and Jeppesen, {B. R.} and Jensen, {P. B.} and Hansen, {J. L.} and Ram, {S. K.} and O. Sigmund and M. Madsen and Madsen, {S. P.} and B. Julsgaard",
year = "2018",
month = "9",
doi = "10.1016/j.optmat.2018.06.038",
language = "English",
volume = "83",
pages = "279--289",
journal = "Optical Materials",
issn = "0925-3467",
publisher = "Elsevier BV * North-Holland",

}

RIS

TY - JOUR

T1 - Improving the efficiency of solar cells by upconverting sunlight using field enhancement from optimized nano structures

AU - Balling, P.

AU - Christiansen, J.

AU - Christiansen, R. E.

AU - Eriksen, Emil

AU - Lakhotiya, H.

AU - Mirsafaei, M.

AU - Moller, S. H.

AU - Nazir, A.

AU - Vester-Petersen, J.

AU - Jeppesen, B. R.

AU - Jensen, P. B.

AU - Hansen, J. L.

AU - Ram, S. K.

AU - Sigmund, O.

AU - Madsen, M.

AU - Madsen, S. P.

AU - Julsgaard, B.

PY - 2018/9

Y1 - 2018/9

N2 - Spectral conversion of the sunlight has been proposed as a method for enhancing the efficiency of photovoltaic devices, which are limited in current production by the mismatch between the solar spectrum and the wavelength range for efficient carrier generation. For example, the photo current can be increased by conversion of two low-energy photons (below the band gap of the absorber) to one higher-energy photon (i.e. upconversion). In this paper, we will review our ongoing activities aimed at enhancing such spectral-conversion processes by employing appropriately designed plasmonic nanoparticles. The nanoparticles serve as light-concentrating elements in order to enhance the non-linear upconversion process. From the theoretical side, we approach the optimization of nanoparticles by finite-element modelling of the plasmonic near fields in combination with topological optimization of the particle geometries. Experimentally, the nanostructures are formed by electron beam lithography on thin films of Er3+-containing transparent materials, foremost TiO2 made by radio-frequency magnetron sputtering, and layers of chemically synthesized NaYF4 nanoparticles. The properties of the upconverter are measured using a variety of optical methods, including time-resolved luminescence spectroscopy on erbium transitions and spectrally resolved upconversion-yield measurements at similar to 1500-nm-fight excitation. The calculated near-field enhancements are validated using a technique of near-field-enhanced ablation by tunable, ultrashort laser pulses.

AB - Spectral conversion of the sunlight has been proposed as a method for enhancing the efficiency of photovoltaic devices, which are limited in current production by the mismatch between the solar spectrum and the wavelength range for efficient carrier generation. For example, the photo current can be increased by conversion of two low-energy photons (below the band gap of the absorber) to one higher-energy photon (i.e. upconversion). In this paper, we will review our ongoing activities aimed at enhancing such spectral-conversion processes by employing appropriately designed plasmonic nanoparticles. The nanoparticles serve as light-concentrating elements in order to enhance the non-linear upconversion process. From the theoretical side, we approach the optimization of nanoparticles by finite-element modelling of the plasmonic near fields in combination with topological optimization of the particle geometries. Experimentally, the nanostructures are formed by electron beam lithography on thin films of Er3+-containing transparent materials, foremost TiO2 made by radio-frequency magnetron sputtering, and layers of chemically synthesized NaYF4 nanoparticles. The properties of the upconverter are measured using a variety of optical methods, including time-resolved luminescence spectroscopy on erbium transitions and spectrally resolved upconversion-yield measurements at similar to 1500-nm-fight excitation. The calculated near-field enhancements are validated using a technique of near-field-enhanced ablation by tunable, ultrashort laser pulses.

KW - Upconversion

KW - Photovoltaics

KW - Plasmonic enhancement

KW - ELECTRON-BEAM LITHOGRAPHY

KW - UP-CONVERSION LUMINESCENCE

KW - OPTICAL NEAR-FIELD

KW - DIMENSIONAL PHOTONIC CRYSTALS

KW - PROXIMITY EFFECT CORRECTION

KW - TOPOLOGY OPTIMIZATION

KW - PHOTOVOLTAIC APPLICATIONS

KW - GOLD NANOPARTICLES

KW - SURFACE-PLASMONS

KW - EPITAXIAL-GROWTH

U2 - 10.1016/j.optmat.2018.06.038

DO - 10.1016/j.optmat.2018.06.038

M3 - Journal article

VL - 83

SP - 279

EP - 289

JO - Optical Materials

JF - Optical Materials

SN - 0925-3467

ER -