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HANNOVER MESSE 2019, 01 - 05 April
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Research & Technology

The adhesive technology for solar cell interconnection is market-ready

In the joint research project “KleVer”, the Fraunhofer ISE and teamtechnik have developed adhesive technology for connecting silicon solar cells. The technology offers a material-friendly alternative to soft soldering interconnection technology.

24 May. 2018
HMI-ID05-033br_FraunhoferISE
The adhesive technology for solar cell interconnection is market-ready (Photo: Fraunhofer ISE)

In their joint project “KleVer” (cost-saving adhesive-based interconnection technology for high-efficiency solar cells), the Fraunhofer Institute for Solar Energy Systems ISE and Freiberg-based systems manufacturer teamtechnik have developed adhesive technology for connecting high-efficiency solar cells that is now ready for market. The project team have reported that their adhesive technology is now ready for industrial use as a sound alternative to soft soldering interconnection technology: Solar cells, as full or half cells with three, four, or five busbars, can be connected to a stringer with an adhesive unit, using electrically conductive adhesives at a throughput of approx. 1,600 cells per hour.

The advantage of the new technology is the process temperatures: At under 180 °C, they are considerably lower than soldering temperatures, which means that temperature-sensitive high-efficiency solar cells can also be joined using adhesives in a gentle and material-saving process. The reliability of the adhesive connection was verified in tests carried out in a climate chamber.

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