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Inkjet-Printing of Phosphorus and Boron Dopant Sources for Tunnel Oxide Passivating Contacts

 
: Kiaee, Z.; Reichel, C.; Keding, R.; Nazarzadeh, M.; Lohmann, R.; Feldmann, F.; Jahn, M.; Huyeng, J.D.; Hermle, M.; Clement, F.

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Fulltext urn:nbn:de:0011-n-5782901 (674 KByte PDF)
MD5 Fingerprint: 39b43566c8fd2ffc7d0428bdf78887d6
Created on: 3.3.2020


36th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2019 : Proceedings of the international conference held in Marseille, France, 09-13 September 2019
Marseille, 2019
ISBN: 3-936338-60-4
pp.187-191
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <36, 2019, Marseille>
English
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Photovoltaik; Silicium-Photovoltaik; Pilotherstellung von industrienahen Si-Solarzellen; sources; Inkjet; poly-silicon; printing; TOPCon

Abstract
This paper presents inkjet-printing of phosphorus and boron dopant inks for the formation of tunnel oxide passivating contacts (TOPCon) for back-contact back-junction (BC-BJ) silicon solar cells. The successful realization of passivating contacts utilizing printing technologies is a crucial prerequisite to simplify the fabrication process of BC-BJ cells while approaching the theoretical efficiency limit of silicon solar cells. In this work, the focus is set on developing inkjet printing processes for the application of dopant sources towards higher precision, homogeneity of printed lines and lifetime, in order to establish high passivation quality for TOPCon. Excellent passivation quality is achieved for inkjet-printed n-type (phosphorus) poly-Si surfaces with an implied open-circuit voltage iVOC of up to 733 mV and an implied fill factor iFF of up to 86.4%. For p-type (boron) poly-Si, iVOC of up to 682 mV and iFF of 80.6% were achieved. Similar results were realized by ion-implanted poly-Si surfaces, herein used as the reference, underlining the high potential of the investigated printing processes.

: http://publica.fraunhofer.de/documents/N-578290.html