Influence of series resistance on guidelines for manufacture of concentrator p-on-n GaAs solar cells

Algora, Carlos; Díaz, Vicente

doi:10.1002/(sici)1099-159x(200003/04)8:2<211::aid-pip291>3.0.co;2-d

Cited by 57 publications

(52 citation statements)

References 13 publications

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“…Besides, we can observe that the efficiency gain is higher at higher f s This effect is mainly due to the important loss of absorbed light for FK-NoCavity case, when the cell surface covered by grid lines (i. Another extracted conclusion for these two graphics is that each value of f s has its optimum C, and the higher f s [7] is the higher optimum C value will be (even if this optimum C value is different for both modules). The explanation of this effect has to do with series resistance (R s ).…”

Section: Cavity Efficiency Gain Modelmentioning

confidence: 85%

High-efficiency Köhler photovoltaic concentrators with external light confinement

et al. 2011

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Metal grid lines are a vital element in multijunction solar cells in order to take out from the cell the generated photocurrent. Nevertheless all this implies certain shadowing factor and thus certain reflectivity on cells surface that lowers its light absorption. This reflectivity produces a loss in electrical efficiency and thus a loss in global energy production for CPV systems. We present here an optical design for recovering this portion of reflected light, and thus leading to a system efficiency increase. This new design is based on an external confinement cavity, an optical element able to redirect the light reflected by the cell towards its surface again. It has been possible thanks to the recent invention of the advanced Köhler concentrators by LPI, likely to integrate one of these cavities easily. We have proven the excellent performance of these cavities integrated in this kind of CPV modules offering outstanding results: 33.2% module electrical efficiency @Tcell=25ºC and relative efficiency and I sc

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Section: Cavity Efficiency Gain Modelmentioning

confidence: 85%

High-efficiency Köhler photovoltaic concentrators with external light confinement

et al. 2011

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show abstract

“…Another extracted conclusion for both graphics is that each value of f s has its optimum C, and the higher f s is, the higher optimum C value will be [6] (even if this optimum C value is different for both modules). The explanation of this effect has to do with series resistance (R s ).…”

Section: Cavity Efficiency Gain Modelmentioning

confidence: 99%

Towards 35% Efficient Concentrator Modules Based On LPI Köhler Concentrators With External Confinement Cavities

Zamora¹,

Benı́tez²,

Miñano³

et al. 2011

AIP Conference Proceedings

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Abstract.Multijunction solar cells present a certain reflectivity on its surface that lowers its light absorption. This reflectivity produces a loss in electrical efficiency and thus a loss in global energy production for CPV systems. We present here an optical design for recovering this portion of reflected light, and thus leading to a system efficiency increase. This new design is based on an external confinement cavity, an optical element able to redirect the light reflected by the cell towards its surface again. We have proven the excellent performance of these cavities integrated in CPV modules offering outstanding results: 33.2% module electrical efficiency @T cell =25ºC and relative efficiency and I sc gains of over 6%.

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“…The relative insensitivity to illumination non-uniformities, on the single cell level, in a MJPV also contributes to this performance enhancement and economic feasibility under high concentration ratios. Moreover, the high efficiency of MJPVs under high concentrations significantly reduces the required cell area, which in turn decreases series resistance and improves heat dissipation [136]. As a result, the highest recorded experimental PV efficiency of 44.4% belongs to a three-junction PV under 302 Â concentration [58].…”

Section: Multi-junction Photovoltaic Cellsmentioning

confidence: 99%

Concentrated photovoltaic thermal (CPVT) solar collector systems: Part I – Fundamentals, design considerations and current technologies

Sharaf

Orhan

2015

Renewable and Sustainable Energy Reviews

182

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Influence of series resistance on guidelines for manufacture of concentrator p-on-n GaAs solar cells

Cited by 57 publications

References 13 publications

High-efficiency Köhler photovoltaic concentrators with external light confinement

High-efficiency Köhler photovoltaic concentrators with external light confinement

Towards 35% Efficient Concentrator Modules Based On LPI Köhler Concentrators With External Confinement Cavities

Concentrated photovoltaic thermal (CPVT) solar collector systems: Part I – Fundamentals, design considerations and current technologies

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