IBC technology: Back contacts move to the front


By Radovan Kopecek, Joris Libal, Valentin D. Mihailetchi, Florian Buchholz, Haifeng Chu, Razvan Roescu, Jan Lossen, Christoph Peter, Andreas Halm & Eckard Wefringhaus of International Solar Energy Research Center (ISC) Konstanz, Germany

The holy grail of every solar cell producer is the creation of a lowcost interdigitated back-contact (IBC) solar cell with an efficiency greater than 25%, a goal that can be found in almost every roadmap presentation. In this paper it will be shown that we are not far away from achieving this target, since IBC devices, with different process complexities, are already in production at several companies.

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