Impurity Gettering by Diffusion-doped Polysilicon Passivating Contacts for Silicon Solar Cells
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Liu, An Yao; Yan, Di; Wong-Leung, Jennifer; Li, Li (Lily); Phang, Sieu Pheng; Cuevas, Andres; Macdonald, Daniel
Description
We report direct experimental evidence for the strong impurity gettering effects associated with the formation of diffusion-doped polysilicon passivating contacts. Iron is used as a marker impurity in silicon to quantify the gettering effectiveness. By monitoring the iron redistribution from the silicon wafer bulk to the polysilicon surface layers, via a combination of carrier lifetime, secondary ion mass spectrometry (SIMS), and transmission electron microscopy (TEM) techniques, the respective...[Show more]
dc.contributor.author | Liu, An Yao | |
---|---|---|
dc.contributor.author | Yan, Di | |
dc.contributor.author | Wong-Leung, Jennifer | |
dc.contributor.author | Li, Li (Lily) | |
dc.contributor.author | Phang, Sieu Pheng | |
dc.contributor.author | Cuevas, Andres | |
dc.contributor.author | Macdonald, Daniel | |
dc.coverage.spatial | Waikoloa Village, USA | |
dc.date.accessioned | 2019-10-03T02:45:31Z | |
dc.date.created | June 10-15 2018 | |
dc.identifier.isbn | 9781538685297 | |
dc.identifier.issn | 0160-8371 | |
dc.identifier.uri | http://hdl.handle.net/1885/173089 | |
dc.description.abstract | We report direct experimental evidence for the strong impurity gettering effects associated with the formation of diffusion-doped polysilicon passivating contacts. Iron is used as a marker impurity in silicon to quantify the gettering effectiveness. By monitoring the iron redistribution from the silicon wafer bulk to the polysilicon surface layers, via a combination of carrier lifetime, secondary ion mass spectrometry (SIMS), and transmission electron microscopy (TEM) techniques, the respective gettering sites in the phosphorus and boron diffusiondoped polysilicon contacts are identified. In phosphorus-doped polysilicon, iron moves to the heavily doped polysilicon layer; and in the boron-doped structure, iron is gettered to the boron-rich layer. Both gettering processes occur via an impurity segregation mechanism. Lastly, the gettering of iron to the polysilicon surface layers is found to have no impact on the passivation quality of the polysilicon contacts. | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | IEEE | |
dc.relation.ispartofseries | 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 | |
dc.rights | © 2018 IEEE | |
dc.source | 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC | |
dc.title | Impurity Gettering by Diffusion-doped Polysilicon Passivating Contacts for Silicon Solar Cells | |
dc.type | Conference paper | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
dc.date.issued | 2018-06-10 | |
local.identifier.absfor | 020406 - Surfaces and Structural Properties of Condensed Matter | |
local.identifier.ariespublication | u3102795xPUB214 | |
local.type.status | Published Version | |
local.contributor.affiliation | Liu, An Yao, College of Engineering and Computer Science, ANU | |
local.contributor.affiliation | Yan, Di, College of Engineering and Computer Science, ANU | |
local.contributor.affiliation | Wong-Leung, Yin-Yin (Jennifer), College of Science, ANU | |
local.contributor.affiliation | Li, Li (Lily), College of Science, ANU | |
local.contributor.affiliation | Phang, Sieu Pheng, College of Engineering and Computer Science, ANU | |
local.contributor.affiliation | Cuevas, Andres, College of Engineering and Computer Science, ANU | |
local.contributor.affiliation | MacDonald, Daniel, College of Engineering and Computer Science, ANU | |
local.description.embargo | 2037-12-31 | |
local.identifier.doi | 10.1109/PVSC.2018.8547431 | |
local.identifier.absseo | 970102 - Expanding Knowledge in the Physical Sciences | |
dc.date.updated | 2019-04-21T08:25:52Z | |
local.identifier.scopusID | 2-s2.0-85059881551 | |
Collections | ANU Research Publications |
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