Rear surface effects in high efficiency silicon solar cells

Wenham, Stuart; Robinson, Stephen J.; Dai, Xianzhe; Zhao, Jianhua; Wang, A.; Tang, Yiming; Ebong, Abasifreke; Honsberg, C.B.; Green, M.A.

doi:10.1109/wcpec.1994.519963

Cited by 23 publications

(13 citation statements)

References 9 publications

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“…24 to be due to breakage of the texturisation pyramids, while McIntosh attributed it to resistance‐limited regions of high recombination 23. It was found that a high ideality factor value at the maximum power point (MPP) indicates reduced FF 25. Figure 4b also shows the MPPs of these cells; although an ideality factor above unity was calculated for all cases, significant variation was noted between electroless and photoplated cells.…”

Section: Resultsmentioning

confidence: 97%

Advantages of photoplating for laser doped solar cells

Hameiri

Mai

Wenham

2011

Progress in Photovoltaics

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The use of laser doping in solar cell fabrication has received increased attention in recent years, especially due to its ability to form a selective emitter without subjecting the wafer to prolonged high temperature processes and likely corresponding degradation. At the University of New South Wales, a novel laser doping method was developed that combines the formation of the selective emitter with a self-aligned metallisation pattern. This paper investigates the influence of different plating methods on shunt and enhanced recombination regions. It was found that the pseudo fill factors of solar cells plated using photoplating are higher compared to those plated with the electroless method, indicating reduced shunting and/or junction recombination. The superiority of the photoplating method is even more pronounced at high laser powers. According to our knowledge this is the first time photoplating and electroless plating techniques have been compared for laser-doped solar cells.

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Section: Resultsmentioning

confidence: 97%

Advantages of photoplating for laser doped solar cells

Hameiri

Mai

Wenham

2011

Progress in Photovoltaics

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“…This structure has produced the highest open-circuit voltage of the cells of Fig. 3.7, with open-circuit voltage up to 720 mV demonstrated under standard test conditions (Wenham et al, 1994), together with efficiencies above 23%.…”

Section: The Path To 25% Cell Efficiencymentioning

confidence: 90%

Crystalline Silicon Solar Cells

Green

2014

Series on Photoconversion of Solar Energy

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“…Interestingly, however, the Voc were higher in the LBSF cells with modified Al pastes. This behavior of having lower Jsc and FF while maintaining high Voc is most likely due to the parasitic shunting between the back contact and the dielectric induced inversion layer (or floating junction) as discussed in [7,8]. The spatial uniformity of the back surface passivation in full area Al-BSF and LBSF cells was evaluated using LBIC.…”

Section: Effect Of Al Paste Composition On the Performance Of Lbsf Somentioning

confidence: 99%

Investigation of Modified Screen-Printing Al Pastes for Local Back Surface Field Formation

Meemongkolkiat

Nakayashiki

Kim

et al. 2006

2006 IEEE 4th World Conference on Photovoltaic Energy Conference

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This paper reports on a low-cost screen-printing process to form a self-aligned local back surface field (LBSF) through dielectric rear surface passivation. The process involved formation of local openings through a dielectric (SiNx or stacked SiO2/SiNx) prior to full area Al screenprinting and a rapid firing. Conventional Al paste with glass frit degraded the SiNx surface passivation quality because of glass frit induced pinholes and etching of SiNx layer, and led to very thin LBSF regions. The same process with a fritless Al paste maintained the passivation quality of the SiNx, but did not provide an acceptably thick and uniform LBSF. Al pastes containing appropriate additives gave better LBSF because of the formation of a thicker and more uniform Al-BSF region. However, they exhibited somewhat lower internal back surface reflectance (<90%) compared to conventional Al paste on SiNx. More insight on these competing effects is provided by fabrication and analysis of complete solar cells.

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Rear surface effects in high efficiency silicon solar cells

Cited by 23 publications

References 9 publications

Advantages of photoplating for laser doped solar cells

Advantages of photoplating for laser doped solar cells

Crystalline Silicon Solar Cells

Investigation of Modified Screen-Printing Al Pastes for Local Back Surface Field Formation

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