A Systematic Approach to Reduce Process-Induced Shunts in Back-Contacted MC-Si Solar Cells

Granek, F.; Weeber, A.W.; Tool, Kees; Kinderman, R.; Jong, Peter de

doi:10.1109/wcpec.2006.279673

Cited by 5 publications

(2 citation statements)

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“…From detailed analysis of the possible shunt paths in the PUM cell it was found that shunt paths around the hole were most critical [8]. By optimizing the emitter laser isolation and the corresponding emitter processing we improved shunt resistances on 225 cm 2 cells from about 7 W to beyond 50 W. With this improved process an efficiency of 16.7% was reached for a 225 cm 2 large mc-Si PUM cell.…”

Section: Results and Discussion High-efficiency Pum Cellsmentioning

confidence: 98%

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How to achieve 17% cell efficiencies on large back-contacted mc-Si solar cells

Weeber

Kinderman

Tool

et al. 2006

2006 IEEE 4th World Conference on Photovoltaic Energy Conference

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It is demonstrated that back-contacted PUM modules made with industrially applicable processes will result in at least 0.8% absolute higher efficiencies than modules manufactured with conventional Hpattern cells. At the cell level, this advantage is about 0.3% absolute, which is almost entirely related to the 2% larger short-circuit current of PUM cells due to less front-side metallization coverage. After interconnection and lamination, at least an additional 0.5% absolute efficiency gain for PUM was obtained because of the lower series resistance losses in the PUM concept. The more efficient current collection over the cell area and the possibility of using wider interconnection material at the rear are the reasons for the lower resistance losses.The stability of the in-line PUM process using simple belt furnaces was demonstrated on a batch of more than 350 cells. The average efficiency for PUM cells is 15.8% with a top efficiency of 16.7%.

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Section: Results and Discussion High-efficiency Pum Cellsmentioning

confidence: 98%

“…The integral process was optimized to obtain high efficiencies on a large amount of solar cells, thus with a good process stability. Identifying the shunt paths and adjusting the process to prevent shunting have been key research issues [8].…”

Section: Experimental High-efficiency Pum Cellsmentioning

confidence: 99%