Screen-printed high performance aluminum and polymer pastes for n-type solar cells

Author

Jiang, H. ; Seyedmohammadi, S. ; Shaikh, A. ; Graddy, E.

Author_Institution

ECGM, Ferro Corp., Vista, CA, USA

fYear

2011

fDate

19-24 June 2011

Abstract

This paper presents high performance Al pastes for n-type solar cells with p-type backside. These pastes were screen printed and subsequently fired in a belt furnace to form rear-Al emitters. Internal Quantum Efficiency (IQE), and full I-V curve characterization and curve fitting to investigate leakage currents were carried out to study the effect of glass frits, additives and firing profiles. The paste performance including bow and adhesion are also presented. This paper also presents a screen printable, low temperature curable conductive polymer paste and its application in n-type solar cell fabrication. The solderable polymer paste enables full Al coverage of the back surface. Its excellent adhesion and low contact resistivity to Al allow it to be used as rear Ag busbar.

Keywords

additives; adhesion; aluminium; busbars; conducting polymers; curve fitting; firing (materials); solar cells; Al; IQE; additives; adhesion; belt furnace; busbar; firing profiles; glass frits effect; internal quantum efficiency; l-V curve characterization; l-V curve fitting; low contact resistivity; low temperature curable conductive polymer paste; n-type solar cell fabrication; n-type solar cells; p-type backside; polymer pastes; rear-aiuminium emitters; screen-printed high performance aluminum; solderable polymer paste; Additives; Adhesives; Firing; Glass; Photovoltaic cells; Polymers; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE

Conference_Location

Seattle, WA

ISSN

0160-8371

Print_ISBN

978-1-4244-9966-3

Type

conf

DOI

10.1109/PVSC.2011.6186233

Filename

6186233