Investigation of the Interactions Between Low-Temperature Ag Paste Components and SiO2/Poly-Si(n) Contacts and the Impact on Contact Properties

Jonathan L. Bryan, David L. Young, Paul Stradins, Zachary C. Holman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Reducing poly-Si thickness to minimize parasitic absorption on a light-receiving side of a TOPCon solar cell without suffering voltage losses after metallization is a challenge in optimizing TOPCon performance. As an alternative to fire-through pastes, we investigate low-temperature Ag paste to SiO2/poly-Si passivating contacts through fabrication of electrical test structures to characterize the passivation quality and electrical transport across the metallized interface. With current paste chemistries, we find that solvent wetting of the poly-Si surface before evaporation and non-volatile binder resin adhesion to the surface after curing are major impediments which prevent Ag contact formation. However, low-resistance poly-Si/Ag interfaces formed with physical vapour deposition similarly degrade after annealing, indicating contacting issues related to the Ag content even in the absence of the organic paste components.

Original languageEnglish (US)
Title of host publicationSiliconPV 2021 - 11th International Conference on Crystalline Silicon Photovoltaics
EditorsRolf Brendel, Christophe Ballif, Sebastien Dubois, Stefan Glunz, Giso Hahn, Jef Poortmans, Pierre Verlinden, Arthur Weeber
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735443624
DOIs
StatePublished - Aug 24 2022
Event11th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2021 - Hamelin, Virtual, Germany
Duration: Apr 19 2021Apr 23 2021

Publication series

NameAIP Conference Proceedings
Volume2487
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference11th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2021
Country/TerritoryGermany
CityHamelin, Virtual
Period4/19/214/23/21

ASJC Scopus subject areas

  • General Physics and Astronomy

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