Tailoring the Optical Properties of APCVD Titanium Oxide Films for All-Oxide Multilayer Antireflection Coatings

Davis, Kristopher O.; Jiang, Kaiyun; Habermann, D.; Schoenfeld, Winston V.

doi:10.1109/jphotov.2015.2437272

Cited by 27 publications

(14 citation statements)

References 18 publications

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“…They showed S eff of 3.88 cm s −1 in 1 Ωcm n‐type silicon when the film was extrinsically charged using corona. In particular they showed that the films optical properties can be tailored in APCVD deposition, as previously shown by Davis et al , while passivation properties are modified post‐deposition by additional processing. A summary of the best performing passivating titanium oxide films is shown in Table .…”

Section: Materials and Methods For Silicon Surface Passivationmentioning

confidence: 56%

“…TiO x showed optimal optical properties to act as an antireflection coating between a silicon surface and an Ethylene Vinyl Acetate (EVA) encapsulant film used when packing cells into modules . The ideal refractive index for the top antireflection layer in encapsulated cell is ∼2.1 at λ = 630 nm . Deposition of TiO x was performed using either chemical or physical vapour techniques , and its use extended beyond that of the solar industry, most prominently in glass manufacturing as a protection coating deposited using ultra‐high throughput techniques .…”

Section: Materials and Methods For Silicon Surface Passivationmentioning

confidence: 99%

See 1 more Smart Citation

Dielectric surface passivation for silicon solar cells: A review

Bonilla

Hoex

Hamer

et al. 2017

Physica Status Solidi (a)

236

161

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Silicon wafer solar cells continue to be the leading photovoltaic technology, and in many places are now providing a substantial portion of electricity generation. Further adoption of this technology will require processing that minimises losses in device performance. A fundamental mechanism for efficiency loss is the recombination of photo-generated charge carriers at the unavoidable cell surfaces. Dielectric coatings have been shown to largely prevent these losses through a combination of different passivation mechanisms. This review aims to provide an overview of the dielectric passivation coatings developed in the past two decades using a standardised methodology to characterise the metrics of surface recombination across all techniques and materials. The efficacy of a large set of materials and methods has been evaluated using such metrics and a discussion on the current state and prospects for further surface passivation improvements is provided.

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Section: Materials and Methods For Silicon Surface Passivationmentioning

confidence: 56%

Section: Materials and Methods For Silicon Surface Passivationmentioning

confidence: 99%

Dielectric surface passivation for silicon solar cells: A review

Bonilla

Hoex

Hamer

et al. 2017

Physica Status Solidi (a)

236

161

View full text Add to dashboard Cite

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“…Aperiodic photonic thin-film mirrors are designed and simulated with the common dielectric materials SiO 2 , Si 3 N 4 , TiO 2 , and Al 2 O 3 (see Figure S1 in the Supporting Information). Superstrate and substrate indices for the cover glass and EVA are taken from refs and , respectively, while for air we take n = 1.…”

Section: Methodsmentioning

confidence: 99%

Spectrally Selective Mirrors with Combined Optical and Thermal Benefit for Photovoltaic Module Thermal Management

et al. 2018

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Waste heat generated during daytime operation of a solar module will raise its temperature and reduce cell efficiency. In addition to thermalization and carrier recombination, one major source of excess heat in modules is the parasitic absorption of light with sub-bandgap energy. Parasitic absorption can be prevented if sub-bandgap radiation is reflected away from the module. We report on the design considerations and projected changes to module energy yield for photonic reflectors capable of reflecting a portion of sub-bandgap radiation while maintaining or improving transmission of light with energy greater than the semiconductor bandgap. Using a previously developed, self-consistent opto-electro-thermal finite-element simulation, we calculate the total additional energy generated by a module, including various photonic reflectors, and decompose these benefits into thermal and optical effects. We show that the greatest total energy yield improvement comes from photonic mirrors designed for the outside of the glass, but that mirrors placed between the glass and the encapsulant can have significant thermal benefit. We then show that optimal photonic mirror design requires consideration of all angles of incidence, despite unequal amounts of radiation arriving at each angle. We find that optimized photonic mirrors will be omnidirectional in the sense that they have beneficial performance, regardless of the angle of incidence of radiation. By fulfilling these criteria, photonic mirrors can be used at different geographic locations or different tilt angles than their original optimization conditions with only marginal changes in performance. We show designs that improve energy output in Golden, Colorado by 3.7% over a full year. This work demonstrates the importance of considering real-world irradiance and weather conditions when designing optical structures for solar applications.

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“…7c shows absorption obtained by FDTD simulation. In the simulation, we have used refractive index and extinction coefficient for TiO 2 from reference [29] and Ag (CRC) from FDTD software [30]. The monitor was placed at a distance of 10 nm from the top surface of the thin film.…”

Section: Absorption Spectroscopy and Fdtd Simulationmentioning

confidence: 99%

SHI irradiation induced modifications of plasmonic properties of Ag-TiO₂ thin film and study using FDTD simulation

Sharma

Singhal

2019

Materials Science-Poland

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Modifications in morphological and plasmonic properties of heavily doped Ag-TiO2 nanocomposite thin films by ion irradiation have been observed. The Ag-TiO2 nanocomposite thin films were synthesized by RF co-sputtering and irradiated by 90 MeV Ni ions with different fluences. The modifications in morphological, structural and plasmonic properties of the nanocomposite thin films caused by ion irradiation were studied by transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-Vis absorption spectroscopy. The thickness of the film and concentration of Ag were assessed by Rutheford backscattering (RBS) as ~50 nm and 56 at.%, respectively. Interestingly, localized surface plasmon resonance (LSPR) appeared at 566 nm in the thin film irradiated at the fluence of 1 × 1013 ions/cm2. This plasmonic behavior can be attributed to the increment in interparticle separation. Increased interparticle separation diminishes the plasmonic coupling between the nanoparticles and the LSPR appears in the visible region. The distribution of Ag nanoparticles obtained from HR-TEM images has been used to simulate absorption spectra and electric field distribution along Ag nanoparticles with the help of FDTD (Finite Difference Time Domain). Further, the ion irradiation results (experimental as well simulated) were compared with the annealed nanocomposite thin film and it was found that optical properties of heavily doped metal in the metal oxide matrix can be more improved by ion irradiation in comparison with thermal annealing.

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Tailoring the Optical Properties of APCVD Titanium Oxide Films for All-Oxide Multilayer Antireflection Coatings

Cited by 27 publications

References 18 publications

Dielectric surface passivation for silicon solar cells: A review

Dielectric surface passivation for silicon solar cells: A review

Spectrally Selective Mirrors with Combined Optical and Thermal Benefit for Photovoltaic Module Thermal Management

SHI irradiation induced modifications of plasmonic properties of Ag-TiO₂ thin film and study using FDTD simulation

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Tailoring the Optical Properties of APCVD Titanium Oxide Films for All-Oxide Multilayer Antireflection Coatings

Cited by 27 publications

References 18 publications

Dielectric surface passivation for silicon solar cells: A review

Dielectric surface passivation for silicon solar cells: A review

Spectrally Selective Mirrors with Combined Optical and Thermal Benefit for Photovoltaic Module Thermal Management

SHI irradiation induced modifications of plasmonic properties of Ag-TiO2 thin film and study using FDTD simulation

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Product

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SHI irradiation induced modifications of plasmonic properties of Ag-TiO₂ thin film and study using FDTD simulation