Viability study of porous silicon photonic mirrors as secondary reflectors for solar concentration systems

Mora, M.B. de la; Jaramillo, O.A.; Nava, R.; Tagüeña-Martı́nez, J.; Río, J. A. del

doi:10.1016/j.solmat.2009.01.007

Cited by 31 publications

(23 citation statements)

References 27 publications

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“…Photonic crystals as secondary mirrors have been used in concentrated solar energy applications; although they present heating which degradates their optical properties [3]. In this study we gathered new information about heat transfer in photonic crystals.…”

Section: Conclusion and Remarksmentioning

confidence: 99%

“…Our p-Si mirror is almost as reflective as Si-Al, however it has a smaller value of a eff and showed a greater temperature increase. Although the Si-Al loses its properties to a lower temperature [3]. One of the challenges we will face in the future is to fabricate better and more reflective porous silicon mirrors in order to compete with the Si-Al.…”

Section: Conclusion and Remarksmentioning

confidence: 99%

“…In order to simplify the structure and avoid ray obstruction a secondary reflector is used. Photonic mirrors made of porous silicon (p-Si) multilayers are suitable for this purpose, due to their optical properties and high reflectivity [3]. Alternating layers of material with different refractive indexes are the simplest photonic crystals known.…”

Section: Introductionmentioning

confidence: 99%

“…These periodic dielectric films in a Bragg structure act as a mirror. It is possible to fabricate p-Si mirrors of high quality, however it has been shown by de la Mora et al [3] that despite their high reflectivity p-Si mirrors absorb radiation and have an increase in temperature. In that study an aluminum mirror to one made of p-Si was compared, recording temperature with a K-type thermocouple on the internal surface of the samples.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer in photonic mirrors

Estrada‐Wiese

Río

Mora

2014

J Mater Sci: Mater Electron

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The use of secondary mirrors in solar energy concentration is common. However, high concentrated solar radiation heats these mirrors thereby degrading their physical properties. In particular, aluminum mirrors melt because of high temperature due to storage by high radiative heat transfer. In contradistinction photonic crystals could present ''perfect reflection'' and they can be fabricated using porous silicon which has a higher melting point than aluminum (porous silicon has a melting point higher than 900 K). Porous silicon is a nanostructured semiconductor material which can be fabricated with different porosities and refractive indices. Multilayers of alternating periodic refractive index conform the structure of these photonic crystals. The light that propagates in these structures interacts with its periodic refractive index that generates wavelength gaps of forbidden transmission and so these multilayers conform a mirror. Even these photonic structures are heated when they are exposed to high concentrated solar radiation. In this work we experimentally analyze this heating process and model it using an effective medium approach to explain the increasing temperature behavior.

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Section: Conclusion and Remarksmentioning

confidence: 99%

Section: Conclusion and Remarksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heat transfer in photonic mirrors

Estrada‐Wiese

Río

Mora

2014

J Mater Sci: Mater Electron

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“…The PSPMs are multilayers of two alternated refractive indices where the condition λ 0 /4 in the optical path is imposed. Our model structure is composed of 20 submirrors and based on PSPM structures analyzed in [23]. Our submirrors consist in ten alternating porous silicon layers with refractive indices n 01 = 1.5 and n 02 = 2.0.…”

Section: The Isotropic Layered Systemmentioning

confidence: 99%

Sturm-Liouville Matrix Equation for the Study of Electromagnetic-Waves Propagation in Layered Anisotropic Media

Pernas-Salomón¹,

Pérez‐Álvarez²

2014

PIER M

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Abstract-We obtain a Sturm-Lioville matrix equation of motion (SLME) for the study of electromagnetic wave propagation in layered anisotropic structures. Conducting media were taken into account so that ohmic loss is considered. This equation can be treated using a 4 × 4 associated transfer matrix (T) in layered anisotropic structures, where the tensors: permittivity, permeability and the electric conductivity have a piecewise dependence on the coordinate perpendicular to the layered structure. We use the SLME eigenfunctions and eigenvalues to analyze qualitatively the numerical instability (Ωd problem) which potentially affects practical applications of the transfer matrix method. By means of the SLME coefficients we show analytically that T determinant value can be used to keep a check on the numerical accuracy of calculations. We derive equations to analyze wave propagation in linear layered isotropic structures. The SLME approach is applied on two typical layered structures to verify theoretical predictions and experimental results.

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Photovoltaics literature survey (No. 72)

Shalav

2009

Progress in Photovoltaics

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In order to help keep readers up‐to‐date in the field each issue of Progress in Photovoltaics will contain a list of recently published journal articles most relevant to its aims and scope. This list is drawn from an extremely wide range of journals, including IEEE Transactions on Electron Devices, Journal of Applied Physics, Applied Physics Letters, Progress in Photovoltaics and Solar Energy Materials and Solar Cells. To assist the reader, the list is separated into broad categories, but please note that these classifications are by no means strict. Also note that inclusion in the list is not an endorsement of a paper's quality.

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Viability study of porous silicon photonic mirrors as secondary reflectors for solar concentration systems

Cited by 31 publications

References 27 publications

Heat transfer in photonic mirrors

Heat transfer in photonic mirrors

Sturm-Liouville Matrix Equation for the Study of Electromagnetic-Waves Propagation in Layered Anisotropic Media

Photovoltaics literature survey (No. 72)

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