A comparison of performance of flat and bent photovoltaic luminescent solar concentrators

Vishwanathan, B; Reinders, Angelina H.M.E.; Boer, Dkg Dick de; Desmet, Lieven; Ras, Arno; Zahn, F. Helmut; Debije, MG Michael

doi:10.1016/j.solener.2014.12.001

Cited by 53 publications

(40 citation statements)

References 11 publications

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“…It was found before [13] that a plate-shaped LSC filled with an organic luminescent dye can have an optical collection probability (outgoing converted photons / incident photons) of 0.19 and a concentration ( = ratio between outgoing and incoming irradiance in terms of photons per steradian per unit area) of 1.9 (for dimensions 100 × 100 × 3 mm 3 ). In terms of photons, the number for the luminescent source translates to an optical collection probability of 0.28.…”

Section: Resultsmentioning

confidence: 99%

High-brightness source based on luminescent concentration

2016

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The concept of a high-luminance light source based on luminescent conversion of LED light and optical concentration in a transparent phosphor is explained. Experiments on a realized light source show that a luminous flux of 8500 lm and a luminance of 500 cd/mm² can be attained using 56 pump LEDs at 330 W electrical input power. The measurement results are compared to optical simulations, showing that the experimental optical efficiency is slightly lower than expected. The present status enables applications like mid-segment digital projection using LED technology, whereas the concept is scalable to higher fluxes.

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Section: Resultsmentioning

confidence: 99%

High-brightness source based on luminescent concentration

2016

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“…Recently, however, new approaches [2], [10], [15] are being explored in which PV cells are attached to the back side of the lightguide, see Fig. 1, instead of to the edges.…”

Section: Lsc Pv Module Leaf Roofmentioning

confidence: 99%

“…By this approach, the conversion efficiency of PV cells can be effective for a larger area than that of the edges only, as well as reduce the path length that emitted light must travel to reach a cell, thus reducing reabsorption losses. Additional steps are taken to modify the contour of flat sheet lightguides and to shape the sheet material by bending it [14], [15] to increase the design freedom and hence stimulate the applicability of LSC PV elements in product surfaces and for use in building added-or integrated-PV systems.…”

Section: Lsc Pv Module Leaf Roofmentioning

confidence: 99%

Measured Efficiency of a Luminescent Solar Concentrator PV Module Called Leaf Roof

Reinders

Debije

Rosemann

2017

IEEE J. Photovoltaics

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Abstract-A functional prototype of a luminescent solar concentrator photovoltaic (LSC PV) module, called Leaf Roof, aims at demonstrating the design features of LSC PV technologies such as coloring, transparency, and flexibility in physical shape. In this paper, the prototype is presented and the first measurements of its performance are shown. The geometrical gain of this new type of PV module is 3.6. For two types of Leaf Roof modules, I-V curves have been measured resulting in efficiencies of 5.8% for a red-colored PV module, and 5.5% for a green-colored PV module under similar conditions. These results demonstrate colorful, robust solar energy collectors which can be produced in a wide variety of shapes are viable, attractive devices for use in building integrated systems. Additionally, thanks to the use of poly(methyl methacrylate) (PMMA) as a cell encapsulant, the Leaf Roof modules are less susceptible to energy losses at elevated temperatures due to high irradiance and high ambient temperature conditions.

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“…While the LSC is not a new concept, the device first being mentioned in the late 1970s (Weber and Lambe, 1976), there have been relatively few tests of the devices in real situations (Bakr et al, 1999;El-Shahawy and Mansour, 1996;Mansour et al, 2002;Pravettoni et al, 2009;Salem et al, 2000), almost exclusively having been confined to the laboratory settings and direct illumination from solar simulators. While there are statements that the LSC device performs well under diffuse illumination (Hernandez-Noyola et al, 2012;Reda, 2008;Vishwanathan et al, 2015), there are limited research efforts to verify this assertion (Aste et al, 2015;Desmet et al, 2012;Mansour, 1998;Mansour et al, 2002). Therefore, we have undertaken a series of experiments to attempt to ascertain whether this claim is true: does the LSC perform well under environmental diffuse light conditions, and, if so, to what extent?…”

Section: Introductionmentioning

confidence: 98%