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ECN publication
Low-temperature metallisation for current collection and monolithic series interconnection of flexible thin-film PV devices
Löffler, J.; Heijna, M.; Rubingh, E.; Lammeren, T. van; Furthner, F.; Abbel, R.; Meinders, E.R.; Grouchko, M.; Kamishny, A.; Pex, P.P.A.C.
Published by: Publication date:
ECN Solar Energy 6-9-2010
ECN report number: Document type:
ECN-M--10-025 Conference Paper
Number of pages: Full text:
5 Download PDF  

Presented at: 25th European Photovoltaic Solar Energy Conference and Exhibition - 5th World Conference on Photovoltaic Energy Conversion, Valencia, Spain, 6-10 september 2010.

In the EU-FP7 project LOTUS an inkjet printing platform is developed including ink formulations and fast curing processes at low substrate temperature. This metallisation process is aimed for device fabrication by cost-effective roll-to-roll production. Here, the specifications of metallisation patterns for different thin-film silicon and organic photovoltaic (OPV) devices on flexible substrates are presented, together with a benchmark of existing screen printing and inkjet technologies using low-temperature curing silver inks and with first results from nanoparticle inks developed in the project. For the screen printing of narrow lines it is concluded that polymeric thin-film pastes achieve better aspect ratios, while nanoparticle based Ag formulations have proven the potential to approach the bulk conductivity of metallic silver. Commercially available inkjet formulations are comparable to these screen printed nanoparticle pastes. Finally, Ag inks with competitive conductivity potential that can be cured even at room temperature are presented as an example of promising solutions that are studied in the LOTUS project.

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