Title :
Front contact pastes with increased aspect ratio to achieve higher efficiency on screen printed solar cells
Author :
Zhang, Dong ; Moyer, Jerome ; Zhang, Weiming
Author_Institution :
Photovoltaic Mater., Heraeus Mater. Technol. LLC., West Conshohocken, PA, USA
Abstract :
In this paper, we discuss our approach of paste formulations on silvers, frits, vehicles, and additives, and developing several silver pastes which are capable of achieving higher aspect ratio finger lines using a standard industrial screen printer. The paste formulations played a critical role in building thick prints and fine line resolution. The improvement of the paste coupled with the printing optimization, produced higher aspect ratio Great Wall finger lines. The electrical performance of the cells that were screen-printed with this paste was better than that of the reference pastes; they showed fill factors of 0.4-1.7% and efficiencies of 0.2-1.6% greater than the reference pastes.
Keywords :
additives; contact resistance; printing; silver; solar cells; Ag; Great Wall finger lines; additive paste; contact paste; electrical performance; frit paste; screen printed solar cells; silver paste; standard industrial screen printer; vehicle paste; Additives; Electrical resistance measurement; Fingers; Materials science and technology; Photovoltaic cells; Photovoltaic systems; Printing; Silver; Vehicles; Wire;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4244-2949-3
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2009.5411259