Inkjet-Printing for Maskless Separation of Metal Structures for Back-Contact Silicon Solar Cells

Stüwe, D.; Hartmann, Philip; Keding, Roman; Thaidigsmann, B.; Clement, Florian; Prokopiak, Steven; Fastnacht, P.; Jesswein, R.; Geppert, T.; Woehl, R.; Korvink, Jan G.; Biro, Daniel

doi:10.2352/j.imagingsci.technol.2014.58.4.040403

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“…Inks containing phosphorus acid were presented in the thesis of Utama to etch silicon nitride . Another direct etching process was demonstrated by Stüwe et al for the removal of metal layers. An ink consisting of a mix of organic and inorganic acids is inkjet‐printed onto metal layers and directly reacts with the metal layers at a temperature of approximately 60 °C.…”

Section: Inkjet Structuring Concepts and Suitable Inksmentioning

confidence: 99%

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Inkjet Technology for Crystalline Silicon Photovoltaics

et al. 2014

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The world's ever increasing demand for energy necessitates technologies that generate electricity from inexhaustible and easily accessible energy sources. Silicon photovoltaics is a technology that can harvest the energy of sunlight. Its great characteristics have fueled research and development activities in this exciting field for many years now. One of the most important activities in the solar cell community is the investigation of alternative fabrication and structuring technologies, ideally serving both of the two main goals: device optimization and reduction of fabrication costs. Inkjet technology is practically evaluated along the whole process chain. Research activities cover many processes, such as surface texturing, emitter formation, or metallization. Furthermore, the inkjet technology itself is manifold as well. It can be used to apply inks that serve as a functional structure, present in the final device, as mask for subsequent structuring steps, or even serve as a reactant source to activate chemical etch reactions. This article reviews investigations of inkjet-printing in the field of silicon photovoltaics. The focus is on the different inkjet processes for individual fabrication steps of a solar cell. A technological overview and suggestions about where future work will be focused on are also provided. The great variety of the investigated processes highlights the ability of the inkjet technology to find its way into many other areas of functional printing and printed electronics.

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Section: Inkjet Structuring Concepts and Suitable Inksmentioning

confidence: 99%

“…Using inkjet for direct etching has been investigated for the contact separation of sputtered Al and NiV, targeting the contact separation of back contact solar cells . An etchant ink, containing organic and inorganic acids, was inkjet‐printed with a Dimatix DMP 2800 series printer.…”

Section: Metallizationmentioning

confidence: 99%