Solar-cell operation under concentrated illumination

Spaderna, D.W.; Navon, D.H.

doi:10.1109/t-ed.1978.19268

Cited by 21 publications

(11 citation statements)

References 19 publications

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“…2, the associated recombination current density in the bulk is shown by using equation (2). By using equation (3), the suns-V oc curve is simulated and the characteristic parameters V oc and pFF extracted.…”

Section: Theoretical Approachmentioning

confidence: 99%

“…The concentrated light leads to an increase in the excess charge carriers n leading to a higher efficiency potential mainly due to an increased opencircuit-voltage V oc [2]. Proportional to the concentration factor C, expensive cell or receiver area are saved.…”

Section: Introductionmentioning

confidence: 99%

“…Right: The corresponding recombination current densities according to equation(2). The lifetime data corresponds to the average of at least four samples.…”

mentioning

confidence: 99%

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Pseudo FF and Voc analysis of Cz-Si Based Low Concentrator Solar Cells

2015

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In this work, industrially feasible silicon based concentrator solar cells are characterized in dependence of the boron-oxygencomplex being in its active and idle state. The work emphasis on the concentration and therefore injection dependent behaviour of the open-circuit-voltage and pseudo fill factor. It is shown, that beside the usual logarithmic dependence of the open-circuitvoltage, an additional gain of 11 mV is achieved. Furthermore, a higher fill factor limit due to an increasing pseudo fill factor towards increasing irradiance is observed. The behaviour of both quantities can be described by the increasing injection of minority charge carriers diminishing the influence of the boron-oxygen-complex and other recombination channels with ideality factor greater than unity. This analysis shows that concentrator solar cells made of Czochralski grown silicon show a reduced sensitivity by means of this defect decreasing from 1.8 % at one sun to 0.6 % at 17 suns. Thus for concentrator applications, a boron-oxygen-limited bulk lifetime does not corrupt final cell performance to such an extent as for conventional, one-sun solar cells. Recent progress shows peak efficiencies for a metal-wrap-through concentrator solar cell architecture called AP-MWT of 21.1 % at two suns for a passivated emitter and rear solar cell device and over 20 % between five and twelve suns for a device featuring a full area, Al alloyed contact on the rear.

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Section: Theoretical Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pseudo FF and Voc analysis of Cz-Si Based Low Concentrator Solar Cells

2015

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“…The problem of distributed resistance may be handled approximately by various lumped element equivalent circuits, by analytic solutions using simplifying assumptions, or, more exactly, by computer-numerical solu tions for finite element models. Fang and Hauser (1978) and Heizer and Chu (1976) discuss solutions for two-dimensional structures, and Spaderna and Navon (1978) give results for threedimensional structures at high concentration ratios. 6.9.…”

Section: Rt(x) = Pix/wt Tmentioning

confidence: 99%

The Calculation of Solar Efficiency

Fahrenbruch

Bube

1983

Fundamentals of Solar Cells

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“…Inversely proportional to the concentration factor C, the size reduction of the solar cell offers the potential for cost reductions, if all other system components are cost effective. Furthermore, the concentrated light leads to a higher efficiency potential mainly due to an increased open-circuit-voltage V oc [2].…”

Section: Introductionmentioning

confidence: 99%

Industrially feasible all-purpose metal-wrap-through concentrator solar cells

Fellmeth

Ebert

Efinger

et al. 2014

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

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The authors combine a silicon-based metal-wrap-through architecture with a unit cell designed for the purpose of operating under concentrated irradiance, called AP-MWT solar cell. On the illuminated side, the negative polarity is electrically separated by using an emitter window surrounding the perimeter of each unit cell. The final solar cell device consists of an arbitrary number of unit cells with sizes ranging from 1 × 2.25 cm2 up to 14 × 13.5 cm2. The Czochralski based bulk material as well as the manufacturing approach use state-of-the-art industrially feasible technologies alone. Results show a plateau between concentration factors from 5 to 12 reaching efficiencies above 20.0%. An average efficiency of 19.8±0.15%, for over 150 AP-MWT solar cells measured at a concentration factor of 10, is reported. Details on the interconnection and module design will be discussed in another contribution to this conference

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Solar-cell operation under concentrated illumination

Cited by 21 publications

References 19 publications

Pseudo FF and Voc analysis of Cz-Si Based Low Concentrator Solar Cells

Pseudo FF and Voc analysis of Cz-Si Based Low Concentrator Solar Cells

The Calculation of Solar Efficiency

Industrially feasible all-purpose metal-wrap-through concentrator solar cells

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