PVI Paper

Complex problems require simple solutions: How to measure bifacial devices correctly?

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By Dr. Radovan Kopecek, is one of the founders of ISC Konstanz. He has been working at the institute as a full-time manager and researcher since January 2007 and is currently the leader of the advanced solar cells department.; Dr. Joris Libal, works at ISC Konstanz as a project manager, focusing on business development and technology transfer in the areas of highefficiency n-type solar cells and innovative module technology.

LONGi, Jolywood and many other large PV manufacturers claim that bifacial mono c-Si technology is the future. Since 2015, bifacial PV installations have been entering multi- MW installation levels, and are expected to enter multi-GW levels in 2018.

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Published In

PVI Issue
As always we have a selection of technical papers from some of the industry’s leading minds. Radovan Kopecek and Joris Libal from ISC Konstanz tackle one of the biggest issues impeding the rollout of bifacial cell and modules, how to standardise their measurement. As long as there is no commercially available means to measure their gain, bifacial modules will struggle to improve their market penetration. The materials section includes an excellent paper from Fraunhofer THM examining the optimization of diamond wire sawing. The method is becoming increasingly predominant with some equipment manufacturers shelving their slurrybased tools. Here Fraunhofer assesses how to squeeze even more efficiency out of diamond wire saws. CSEM meanwhile explores the required metallization and interconnection process changes required to enable a production-scale shift to silicon heterojunction PV. Mark Osborne provides his latest capacity expansion report as upgrades to higher efficiency lines continue to drive planned investments.

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