Concentrated Photovoltaic Stepped Planar Light Guide

Moore, Duncan T.; Schmidt, Greg; Unger, Blair

doi:10.1364/iodc.2010.jmb46p

Cited by 7 publications

(5 citation statements)

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“…Figure 1(b) shows the exiting concentrator combining a cylindrical lens array with a single-light guide layer with the vertically staggered injected facets, which can be extended in the longitudinal direction with a low manufacturing cost and can reduce the complexity of sun-tracking hardware. 6 To integrate the single-light guide layer into the spectral splitting concentrator, we make the injected facets redirect the focused beam, while concurrently acting as spectral splitting facets. First, a BLGL is placed on a TLGL; then a dichroic coating is added to the injected facets in the BLGL and a triangular prism is also glued on the back of the dichroic coating; finally, the BLGL on the top is assembled with the TLGL on the bottom, thus constructing the doublelight guide layers as shown in Fig.…”

Section: Spectral Splitting Concentrating Approachmentioning

confidence: 99%

“…For overcoming the problem of the above concentration approach, the light guide layers with vertically staggered injected facets can be used. 6,7 The staggered injected facets redirect the sunlight transverse in the light guide layers without any leaking due to the injection points or directing surfaces downstream. This design has the potential advantages of high integration of PV cells and thermal management for the spectral splitting concentrator.…”

Section: Introductionmentioning

confidence: 99%

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High-integrated spectral splitting solar concentrator with double-light guide layers

Meng

et al. 2014

Opt. Eng

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Abstract. Individual secondary optical components in a spectral splitting solar concentrator utilizing a microlens array require multiple photovoltaic (PV) cells, which leads to the complexity of system alignment and a high cost. In order to improve the integration of the PV cells and thermal management, a spectral splitting concentrator coupled to double-light guide layers has been proposed. Using one-axis tracking, we further investigate the optical performance of the concentrator combined with a cylindrical microlens array with double vertically staggered light guide layers in detail. The results show that this solar concentrator maintains a good acceptance angle of AE2 deg in the east-west direction and an acceptable angle of AE14 deg in the perpendicular direction on both low and high spectrums, achieving a concentration ratio of 10×. Finally, the capability of lateral displacement tracking has been explored for an aperture angle of AE24 deg in this concentrator. IntroductionWith the promotion of solar energy utilization, solar concentrating technology which increases the energy collecting efficiency has been rapidly developed and photovoltaic (PV) cells are generally identified as the most important components in a concentrator photovoltaic (CPV) system to realize photoelectricity power conversion.1 To convert a large portion of the incident solar spectrum, a series of PV cells have been constructed by layering semiconductors with different absorption characteristics, manufactured by complex and high-cost multijunction technology.2 Therefore, spectral splitting technology with a low-cost multiple single-junction PV cells has more potential applications due to the low concentration ratio and high photoelectricity conversion efficiency. The single module using spectral splitting technology obtains a high photoelectricity conversion efficiency of 42.7 AE 2.5% combined with an optical efficiency of 93%.

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Section: Spectral Splitting Concentrating Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-integrated spectral splitting solar concentrator with double-light guide layers

Meng

et al. 2014

Opt. Eng

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“…4(a)] where light is shared between extraction sites, and the other is a laterally tapered 'stepped mode volume' (SMV) waveguide [Fig. 4(b)] where each extraction site adiabatically truncates the modal volume [7]. In the SMV design, light makes a single pass through the structure and is extracted uniformly up to a factor determined by the material's absorption coefficient.…”

Section: Light Guiding and Extractionmentioning

confidence: 99%

Planar waveguide LED illuminator with controlled directionality and divergence

Mellette¹,

Schuster²,

Ford³

2014

Opt. Express

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We present a versatile illumination system where white light emitting diodes are coupled through a planar waveguide to periodically patterned extraction features at the focal plane of a two dimensional lenslet array. Adjusting the position of the lenslet array allows control over both the directionality and divergence of the emitted beam. We describe an analytic design process, and show optimal designs can achieve high luminous emittance (1.3x10⁴ lux) over a 2x2 foot aperture with over 75% optical efficiency while simultaneously allowing beam steering over ± 60° and divergence control from ± 5° to fully hemispherical output. Finally, we present experimental results of a prototype system which validate the design model.

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“…On the other hand, the imaging concentrators originate from the traditional imaging optical systems, such as the parabolic dish and trough concentrator [2]. Recently, planar lightguide solar concentrators [3][4][5] combined an imaging lens array with a lightguide layer with light injection facets have attracted much attention for their promising compactness, lightweight, and low-cost.…”

Section: Introductionmentioning

confidence: 99%

Horizontally staggered lightguide solar concentrator with lateral displacement tracking for high concentration applications

2015

Appl. Opt.

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We present the design of a horizontally staggered lightguide solar concentrator with lateral displacement tracking for high concentration applications. This solar concentrator consists of an array of telecentric primary concentrators, a horizontally staggered lightguide layer, and a vertically tapered lightguide layer. The primary concentrator is realized by two plano-aspheric lenses with lateral movement and maintains a high F-number over an angle range of ±23.5°. The results of the simulations show that the solar concentrator achieves a high concentration ratio of 500× with ±0.5° of acceptance angle by a single-axis tracker and dual lateral translation stages.

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Concentrated Photovoltaic Stepped Planar Light Guide

Cited by 7 publications

References 0 publications

High-integrated spectral splitting solar concentrator with double-light guide layers

High-integrated spectral splitting solar concentrator with double-light guide layers

Planar waveguide LED illuminator with controlled directionality and divergence

Horizontally staggered lightguide solar concentrator with lateral displacement tracking for high concentration applications

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