Resonant enhancement of dielectric and metal nanoparticle arrays for light trapping in solar cells

Wang, E; White, Thomas P.; Catchpole, Kylie

doi:10.1364/oe.20.013226

Cited by 21 publications

(8 citation statements)

References 26 publications

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“…Such arrays have wide applications in sensing [5], as filters and nanosized test tubes in biomedicine [6], as photonic crystal fiber lasers and demultiplexers [7,8,9], and as nanostructured electrodes for (surface enhanced Raman) spectroscopy [3,4]. In addition, the possible enhancement of reaction or transport rates due to a large surface area, see Figure 1a, strong electron confinement and short diffusion paths make them highly interesting nanostructures for (photo-)catalysis [10,11,12,13] and photovoltaics (PV) [14,15,16,17,18]. While typically grown on Ti substrates or alloys, TiO2 NTs can be produced as membranes through a lift-off process [2].…”

Section: Introductionmentioning

confidence: 99%

TiO2 Self-Assembled, Thin-Walled Nanotube Arrays for Photonic Applications

David

2019

Materials

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Two-dimensional arrays of hollow nanotubes made of TiO 2 are a promising platform for sensing, spectroscopy and light harvesting applications. Their straightforward fabrication via electrochemical anodization, growing nanotube pillars of finite length from a Ti foil, allows precise tailoring of geometry and, thus, material properties. We theoretically investigate these photonic crystal structures with respect to reduction of front surface reflection, achievable field enhancement, and photonic bands. Employing the Rigorous Coupled Wave Analysis (RCWA), we study the optical response of photonic crystals made of thin-walled nanotubes relative to their bare Ti foil substrate, including under additional charge carrier doping which might occur during the growth process.

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Section: Introductionmentioning

confidence: 99%

TiO2 Self-Assembled, Thin-Walled Nanotube Arrays for Photonic Applications

David

2019

Materials

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“…A similar resonant interaction is responsible for the broad first order peaks in the case without the Ag capping; however, the features are not so sharp. A complete analysis of this behaviour is beyond the scope of this paper and will be reported elsewhere .…”

Section: Resultsmentioning

confidence: 99%

Light trapping with titanium dioxide diffraction gratings fabricated by nanoimprinting

Wang

Mokkapati

White

et al. 2012

Progress in Photovoltaics

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Dielectric scattering structures are a promising way of trapping light in solar cells. Titanium dioxide is a particularly attractive candidate material because of its high refractive index and ability to be deposited on a finished solar cell. Here, we present an experimental demonstration of photocurrent enhancement in thin film recrystallised silicon solar cells using TiO2 pillar arrays fabricated on the rear of the cells using nanoimprint lithography. A short circuit current enhancement of 19% is measured experimentally, and excellent agreement with numerical simulations is obtained. We show numerically that by replacing the Ag capping present on the cells with a detached rear Ag back reflector, the enhancement could reach 37%. Copyright © 2012 John Wiley & Sons, Ltd.

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“…It was shown experimentally that the efficiency of the photo-effect increases due to the deposition of metal nanoparticles (MNPs) on the photoactive surface [1,2,3] for light emitters [4,5,6,7,8], in catalytic [9,10,11] and photovoltaic devices [12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]. Such an enhancement can also be achieved through indirect effects in combination with, e.g., energy conversion in photoluminescent materials [27,28,29,30,31] and dielectric nanostructures [32,33,34,35,36,37]. These studies have advanced tremendously thanks to improvements in the fabrication of nanostructures [38,39,40,41,42,43,44], such as nanowires, nanoantennas and hybrid metal–dielectric designs [45,46,47,48,49].…”

Section: Introductionmentioning

confidence: 99%

Mode Splitting Induced by Mesoscopic Electron Dynamics in Strongly Coupled Metal Nanoparticles on Dielectric Substrates

Kluczyk-Korch

Jacak

et al. 2019

Nanomaterials

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We study strong optical coupling of metal nanoparticle arrays with dielectric substrates. Based on the Fermi Golden Rule, the particle–substrate coupling is derived in terms of the photon absorption probability assuming a local dipole field. An increase in photocurrent gain is achieved through the optical coupling. In addition, we describe light-induced, mesoscopic electron dynamics via the nonlocal hydrodynamic theory of charges. At small nanoparticle size (<20 nm), the impact of this type of spatial dispersion becomes sizable. Both absorption and scattering cross sections of the nanoparticle are significantly increased through the contribution of additional nonlocal modes. We observe a splitting of local optical modes spanning several tenths of nanometers. This is a signature of semi-classical, strong optical coupling via the dynamic Stark effect, known as Autler–Townes splitting. The photocurrent generated in this description is increased by up to 2%, which agrees better with recent experiments than compared to identical classical setups with up to 6%. Both, the expressions derived for the particle–substrate coupling and the additional hydrodynamic equation for electrons are integrated into COMSOL for our simulations.

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Resonant enhancement of dielectric and metal nanoparticle arrays for light trapping in solar cells

Cited by 21 publications

References 26 publications

TiO2 Self-Assembled, Thin-Walled Nanotube Arrays for Photonic Applications

TiO2 Self-Assembled, Thin-Walled Nanotube Arrays for Photonic Applications

Light trapping with titanium dioxide diffraction gratings fabricated by nanoimprinting

Mode Splitting Induced by Mesoscopic Electron Dynamics in Strongly Coupled Metal Nanoparticles on Dielectric Substrates

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