Optical properties of materials for concentrator photovoltaic systems

French, Roger H.; Rodríguez‐Parada, J. M.; Yang, Min; Derryberry, Rebekah A.; Lemon, M. F.; Brown, M.; Haeger, C. R.; Samuels, Sam L.; Romano, E.; Richardson, Robert E.

doi:10.1109/pvsc.2009.5411657

Cited by 40 publications

(24 citation statements)

References 9 publications

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“…n is either directly measured directly using ellipsometry (as in ref. [9]) or extracted from a published trendline fit (such as Cauchy's dispersion law or the Sellmeier equation [7]). From Equation 3, reflective losses are minimized when n is similar between adjacent components.…”

Section: Measurement Of Candidate Components and Materialsmentioning

confidence: 99%

Analysis of transmitted optical spectrum enabling accelerated testing of CPV designs

et al. 2009

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Concentrated photovoltaics (CPV) has recently gained interest based on its scalability and expected low levelized cost of electricity. The reliability of materials used in CPV systems, however, is not well established. The current qualification test for photodegradation of CPV modules includes only real-time ultraviolet (UV) exposure, i.e. methods for accelerated UV testing have not been developed. Therefore, the UV and infrared (IR) spectra transmitted through representative optical systems is evaluated in this paper. The measurements of concentrating optics are used to assess expected optical performance as well as to understand how to quantify damaging optical exposure. Optical properties (transmittance, refractive index, reflectance, and absorptance) of candidate materials are identified. The dose and flux analysis here identifies the increased significance of IR (as opposed to UV) exposure for CPV systems, particularly for the most concentrating systems. For these, the UV dose may not greatly exceed the unconcentrated global solar condition, but the thermal load scales nearly directly with the geometric concentration.

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Section: Measurement Of Candidate Components and Materialsmentioning

confidence: 99%

Analysis of transmitted optical spectrum enabling accelerated testing of CPV designs

et al. 2009

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“…For the roller, a simpler specular reflection model is used, with the reflectivity being a function of the angle of incidence according to the Fresnel equations [15]. A roller with a polytetrafluoroethylene (PTFE) coating is considered, having a refractive index of = n 1.4 r [16]. All non-reflected light is considered to be absorbed.…”

Section: Optical Macro-modelmentioning

confidence: 99%

New analytical and numerical optical model for the laser assisted tape winding process

Reichardt

Baran

Akkerman

2018

Composites Part A: Applied Science and Manufacturing

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A B S T R A C TNew analytical and numerical optical models are proposed for the laser assisted tape winding (LATW) of thermoplastic composites. The irradiation and reflection of the laser beam directly influence the heat flux and temperature distribution during the consolidation, hence the laser optics must be described and understood well for improved bonding quality. For the first time, a two-dimensional (2D) analytical solution is derived for the laser light distribution and reflection by combining the principle of energy conversation with unpolarized Fresnel equations. In the more comprehensive numerical model, a 3D ray tracing approach is incorporated in which a novel non-specular reflection model is developed predicting the anisotropic reflective behaviour of the composite. Heat flux distributions for the substrate and incoming tape are calculated. The analytical and numerical model results are shown to correspond. The non-specular and scattering reflection yields in a larger illuminated area with lower intensity for substrate and tape.

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“…The thicknesses of the antireflective coatings were calculated through simulations, texturing of silicon solar cell was modeled based on the surface electron micrographs reported by Papet et al (2006). Optical property data of the SiNx antireflection layer was obtained from plasma enhanced chemical vapor deposition (PECVD) experiments of Kang et al (2011) and the optical property data of ethylene vinyl acetate (EVA) encapsulation layer was obtained from experiments performed by French et al (2009). Figs.…”

Section: Experimental -Device Modelingmentioning

confidence: 99%

Optical and electronic simulation of gallium arsenide/silicon tandem four terminal solar cells

Vijayakumar

Birnie

2013

Solar Energy

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Optical properties of materials for concentrator photovoltaic systems

Cited by 40 publications

References 9 publications

Analysis of transmitted optical spectrum enabling accelerated testing of CPV designs

Analysis of transmitted optical spectrum enabling accelerated testing of CPV designs

New analytical and numerical optical model for the laser assisted tape winding process

Optical and electronic simulation of gallium arsenide/silicon tandem four terminal solar cells

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