For none, one, or two polarities—How do POLO junctions fit best into industrial Si solar cells?

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dc.identifier.uri Peibst, Robby eng Kruse, Christian eng Schäfer, Sören eng Mertens, Verena eng Bordihn, Stefan eng Dullweber, Thorsten eng Haase, Felix eng Hollemann, Christina eng Lim, Bianca eng Min, Byungsul eng Niepelt, Raphael eng Schulte‐Huxel, Henning eng Brendel, Rolf eng 2022-09-26T13:07:32Z 2022-09-26T13:07:32Z 2019-11-05
dc.identifier.citation Peibst, R.; Kruse, C.; Schäfer, S.; Mertens, V.; Bordihn, S. et al.: For none, one, or two polarities—How do POLO junctions fit best into industrial Si solar cells?. In: Progress in Photovoltaics: Research and Applications 28 (2020), Nr. 6, S. 503-516. DOI: eng
dc.description.abstract We present a systematic study on the benefit of the implementation of poly-Si on oxide (POLO) or related junctions into p-type industrial Si solar cells as compared with the benchmark of Passivated Emitter and Rear Cell (PERC). We assess three aspects: (a) the simulated efficiency potential of representative structures with POLO junctions for none (=PERC+), one, and for two polarities; (b) possible lean process flows for their fabrication; and (c) experimental results on major building blocks. Synergistic efficiency gain analysis reveals that the exclusive suppression of the contact recombination for one polarity by POLO only yields moderate efficiency improvements between 0.23%abs and 0.41%abs as compared with PERC+ because of the remaining recombination paths. This problem is solved in a structure that includes POLO junctions for both polarities (POLO2), for whose realization we propose a lean process flow, and for which we experimentally demonstrate the most important building blocks. However, two experimental challenges—alignment tolerances and screen-print metallization of p+ poly-Si—are unsolved so far and reduced the efficiency of the “real” POLO2 cell as compared with an idealized scenario. As an intermediate step, we therefore work on a POLO IBC cell with POLO junctions for one polarity. It avoids the abovementioned challenges of the POLO2 structure, can be realized within a lean process flow, and has an efficiency benefit of 1.59%abs as compared with PERC—because not only contact recombination is suppressed but also the entire phosphorus emitter is replaced by an n+ POLO junction. eng
dc.language.iso eng eng
dc.publisher Chichester : Wiley
dc.relation.ispartofseries Progress in Photovoltaics: Research and Applications 28 (2020), Nr. 6 eng
dc.rights CC BY-NC 4.0 Unported eng
dc.rights.uri eng
dc.subject efficiency potential eng
dc.subject passivating contacts eng
dc.subject POLO eng
dc.subject poly-Si eng
dc.subject solar cell development eng
dc.subject.ddc 621,3 | Elektrotechnik, Elektronik eng
dc.subject.ddc 530 | Physik eng
dc.title For none, one, or two polarities—How do POLO junctions fit best into industrial Si solar cells? eng
dc.type Article eng
dc.type Text eng
dc.relation.essn 1099-159X
dc.bibliographicCitation.issue 6
dc.bibliographicCitation.volume 28 2020
dc.bibliographicCitation.firstPage 503
dc.bibliographicCitation.lastPage 516
dc.description.version publishedVersion eng
tib.accessRights frei zug�nglich eng

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