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Progress and trends in CIGS and perovskite/CIGS PV

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By Dr. Shiro Nishiwaki, received his Ph.D degree in engineering in 1996 from the Hokkaido University, Sapporo, Japan. Prior to joining the Laboratory for Thin Films and Photovoltaics at Empa in 2008 he worked at Matsushita Electric Co. Ltd., Advanced Technology Research Laboratories, Kyoto, Japan (1997 - 2000), Optoelectronics Division of Electrotechnical Laboratory (present name: National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, Japan (2000), Hahn- Meitner-Institute, Abt SE2, Berlin, Germany (2000 - 2004), Institute of Energy Conversion, Newark, USA (2004 – Dec. 31, 2007). His; Thomas Feurer, received his master degree in physics from the Swiss Federal Institute of Technology (ETH) Zurich in 2014. He started his Ph.D at the Laboratory for Thin Films and Photovoltaics at Empa subsequently. His current research is focused on low bandgap CIGS solar cells and tandem devices with perovskite top cells.; Fan Fu, received his master degree in materials science from Wuhan University of Technology (China) in 2013.; Stefano Pisoni, received his master degree in 2015 from the Polytechnic of Milan with master thesis project at University of Oxford. He is working at the Laboratory for Thin Films and Photovoltaics for his doctoral thesis.; Dr. Stephan Buecheler, studied physics at ETH Zurich and received his diploma in 2007.; Prof. Dr. Ayodhya N. Tiwari, received his M.Sc. from the University of Roorkee, India in 1981, and his Ph.D. from the Indian Institute of Technology (IIT) Delhi in 1986.

Thin-film solar cells based on chalcopyrite semiconductor Cu(In,Ga) (S,Se)2 compound (hereafter called CIGS or CIGSeS irrespective of the exact composition) have continuously drawn interest because of their progressively increasing high photovoltaic conversion efficiencies and the merits of long-term performance stability, high energy yield, low cost production potentials and other advantages for industrial manufacturing and application of solar.

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Photovoltaics International Archive
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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