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Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell
By applying an interdigitated back contacted solar cell concept with poly-Si on oxide passivating contacts an efficiency of 26.1% was achieved recently. In this paper the impact of the implemented initially intrinsic poly-Si region between p-type poly-Si and n-type poly-Si regions is investigated. T...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6971294/ https://www.ncbi.nlm.nih.gov/pubmed/31959783 http://dx.doi.org/10.1038/s41598-019-57310-0 |
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author | Hollemann, C. Haase, F. Rienäcker, M. Barnscheidt, V. Krügener, J. Folchert, N. Brendel, R. Richter, S. Großer, S. Sauter, E. Hübner, J. Oestreich, M. Peibst, R. |
author_facet | Hollemann, C. Haase, F. Rienäcker, M. Barnscheidt, V. Krügener, J. Folchert, N. Brendel, R. Richter, S. Großer, S. Sauter, E. Hübner, J. Oestreich, M. Peibst, R. |
author_sort | Hollemann, C. |
collection | PubMed |
description | By applying an interdigitated back contacted solar cell concept with poly-Si on oxide passivating contacts an efficiency of 26.1% was achieved recently. In this paper the impact of the implemented initially intrinsic poly-Si region between p-type poly-Si and n-type poly-Si regions is investigated. Two recombination paths are identified: The recombination at the interface between the initially intrinsic poly-Si and the wafer as well as the recombination across the resulting p(i)n diode on the rear side which is aimed to be reduced by introducing an initially intrinsic region. By using test structures, it is demonstrated that the width of the initially intrinsic region ((i) poly-Si region) has a strong influence on the recombination current through the p(i)n diode and that this initially intrinsic region needs to be about 30 μm wide to sufficiently reduce the recombination across the p(i)n diode. Lateral and depth-resolved time of flight secondary ion mass spectrometry analysis shows that the high-temperature annealing step causes a strong lateral inter-diffusion of donor and acceptor atoms into the initially intrinsic region. This diffusion has a positive impact on the passivation quality at the c-Si/SiO(x)/i poly-Si interface and is thus essential for achieving an independently confirmed efficiency of 26.1% with 30 μm-wide initially intrinsic poly-Si regions. |
format | Online Article Text |
id | pubmed-6971294 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-69712942020-01-27 Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell Hollemann, C. Haase, F. Rienäcker, M. Barnscheidt, V. Krügener, J. Folchert, N. Brendel, R. Richter, S. Großer, S. Sauter, E. Hübner, J. Oestreich, M. Peibst, R. Sci Rep Article By applying an interdigitated back contacted solar cell concept with poly-Si on oxide passivating contacts an efficiency of 26.1% was achieved recently. In this paper the impact of the implemented initially intrinsic poly-Si region between p-type poly-Si and n-type poly-Si regions is investigated. Two recombination paths are identified: The recombination at the interface between the initially intrinsic poly-Si and the wafer as well as the recombination across the resulting p(i)n diode on the rear side which is aimed to be reduced by introducing an initially intrinsic region. By using test structures, it is demonstrated that the width of the initially intrinsic region ((i) poly-Si region) has a strong influence on the recombination current through the p(i)n diode and that this initially intrinsic region needs to be about 30 μm wide to sufficiently reduce the recombination across the p(i)n diode. Lateral and depth-resolved time of flight secondary ion mass spectrometry analysis shows that the high-temperature annealing step causes a strong lateral inter-diffusion of donor and acceptor atoms into the initially intrinsic region. This diffusion has a positive impact on the passivation quality at the c-Si/SiO(x)/i poly-Si interface and is thus essential for achieving an independently confirmed efficiency of 26.1% with 30 μm-wide initially intrinsic poly-Si regions. Nature Publishing Group UK 2020-01-20 /pmc/articles/PMC6971294/ /pubmed/31959783 http://dx.doi.org/10.1038/s41598-019-57310-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Hollemann, C. Haase, F. Rienäcker, M. Barnscheidt, V. Krügener, J. Folchert, N. Brendel, R. Richter, S. Großer, S. Sauter, E. Hübner, J. Oestreich, M. Peibst, R. Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title | Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title_full | Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title_fullStr | Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title_full_unstemmed | Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title_short | Separating the two polarities of the POLO contacts of an 26.1%-efficient IBC solar cell |
title_sort | separating the two polarities of the polo contacts of an 26.1%-efficient ibc solar cell |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6971294/ https://www.ncbi.nlm.nih.gov/pubmed/31959783 http://dx.doi.org/10.1038/s41598-019-57310-0 |
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