3D-Modelling of polycrystalline silicon solar cells

In this paper, we present a two-dimensional polycrystalline solar cell model to determine the parameters of the cell, such as the photocurrent, the dark current and the conversion efficiency. In this model, we consider an exponential doping profile of the p-region of the cell and hence the onset of an electric field in this region in order to reduce the minority carrier recombination at grain boundary and at rear contact. Consequently, this improved conversion efficiency of the cell. In order to optimize conversion efficiency, the presented model is implemented through a simulation program while varying thickness and doping concentration in the p-region of the cell. Compared with the case of Dirac's function doping profile, the conversion efficiency is maximal in the case of an exponential doping profile.

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“…• The grain boundaries have the same physical characteristics and are normal to the n + -p junction [8].…”

Section: A Physical Model Of An Elementary Solar Cellmentioning

confidence: 99%

“…• Grain boundary recombination is negligible in the emitter [8] and in the space charge region [9] due to their small thickness.…”

Section: A Physical Model Of An Elementary Solar Cellmentioning

confidence: 99%

A new method for improving performances of a polycrystalline solar cell

Kolsi

Amar

2015

IREC2015 the Sixth International Renewable Energy Congress

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“…Figure 10. Simulation of solar cell efficiency in dependence of grain size [10]. The critical parameter is the assumed grain boundary recombination activity (S eff = 10 6 cm 2 /s).…”

Section: Local Shuntsmentioning

confidence: 99%

Compatibility of the RGS silicon wafer with industrial type solar cell processing

Schönecker¹,

Gutjahr

Burgers

et al. 2008

2008 Conference on Optoelectronic and Microelectronic Materials and Devices

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The ribbon-growth-on-substrate (RGS) silicon wafer technology is a unique casting technology for the next generation of silicon wafer manufacturing for photovoltaic application. Compared to today's cut wafer technology, the silicon yield is increased from about 40% to more than 90% due to the direct casting. This in combination with the high production volume per machine and year makes RGS wafers a promising technology for the next step towards cost effective solar electricity. However, for a successful implementation of this technology in the market, not only the wafer manufacturing process but also the compatibility of the RGS wafers with today's solar cell lines has to be demonstrated. This paper presents an overview on the lessons learned in the last 7 years of solar cell processing of RGS wafers manufactured with the laboratory equipment at ECN. Silicon wafer casting; wafer characteristics; solar cells I. 1 2 3 3 978-1-4244-2717-8/08/$25.00

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“…During the development of the multi-crystalline silicon wafer technology, modelling work was done with respect to solar cell efficiency and grain size. In [22] grain boundaries were described by a barrier height and a space charge region around the grains. Depending on the parameters, grain boundaries are more or less recombination active, and also change their behaviour with injection level (typically recombination velocity decreases with increasing injection).…”

Section: Metallic Impuritiesmentioning

confidence: 99%

Casting Technologies for Solar Silicon Wafers: Block Casting and Ribbon-Growth-on-Substrate

Schönecker

Geerligs²,

Müller³

2003

SSP

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Multi-crystalline silicon solar wafer are the working horses of the rapidly developing photovoltaic market. The availability and cost efficiency but, even more important, the improved wafer quality and the understanding how to process multi-crystalline silicon wafers into highly efficient solar cells are important factors in this development. In this paper multi-crystalline silicon wafer manufacturing technologies both in industrial production as well as under development are outlined. Important wafer characteristics such as oxygen-, carbon and metallic impurities are described and experimental links to solar cell efficiency are exemplary demonstrated.

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3D-Modelling of polycrystalline silicon solar cells

Cited by 16 publications

References 17 publications

A new method for improving performances of a polycrystalline solar cell

A new method for improving performances of a polycrystalline solar cell

Compatibility of the RGS silicon wafer with industrial type solar cell processing

Casting Technologies for Solar Silicon Wafers: Block Casting and Ribbon-Growth-on-Substrate

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