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Inkjet printing of isolation layers for back-contacted silicon- heterojunction solar cells
Xaar Jet AB, Sweden.
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2011 (English)In: NIP27 : 27th International Conference on Digital Printing Technologies, October 2-6, 2011, Minneapolis, Minnesota ; Digital Fabrication 2011: technical programs and proceedings, The Society for Imaging Science and Technology, 2011, 651-654 p.Conference paper (Refereed)
Abstract [en]

For wafer based silicon solar cells, the combination of amorphous/crystalline silicon (a-Si:H/c-Si) heterojunction emitters (SHJ) [1] and back-contacted back-junction solar cell concepts (BCBJ) [2] offer a very high efficiency potential of around 24%. Stangl et al. proposed a relatively simple and therefore attractive cell concept comprising a two level metallization isolated by an insulation layer. The emitter layer consisting of doped amorphous silicon with a thickness of several nm and the emitter metallization layer comprise circular openings where the back surface field layers and the respective metallization establish contact to the absorber. In this work the potential of inkjet printing for the deposition of the isolation layer with photoresists or other polymeric fluids is evaluated. Challenges are the required placement precision and the feature size. In order to produce circular openings of the order 10 μm, the drop formation has to be optimized, and the ink spreading on both surfaces - on the aluminum emitter and on the silicon wafer substrate - have to be controlled.

Place, publisher, year, edition, pages
The Society for Imaging Science and Technology, 2011. 651-654 p.
Keyword [en]
Heterojunctions, Ink jet printing, Metallizing, Photoresists, Silicon
National Category
Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-159652ScopusID: 2-s2.0-84860774374ISBN: 978-089208296-4OAI: diva2:786649
27th International Conference on Digital Printing Technologies, NIP27 and 7th International Conference on Digital Fabrication 2011, Minneapolis, MN, United States, 2 October 2011 through 6 October 2011

QC 20150206

Available from: 2015-02-06 Created: 2015-02-06 Last updated: 2015-02-06Bibliographically approved

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Reinhold, Ingo
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