n-type multicrystalline silicon for highefficiency solar cells

Published: October 27, 2016

By Stephan Riepe, Patricia Krenckel, Florian Schindler, Martin C. Schubert & Jan Benick, Fraunhofer Institute for Solar Energy Systems (ISE), Freiburg, Germany

High-efficiency silicon solar cells require silicon wafers of high electrical quality as the base material. One advantage of n-type compared with p-type doped silicon is the smaller impact of many metal impurities on
the electrical material quality. This applies especially to n-type multicrystalline silicon ingots produced by the directional solidification process, with dissolved metal impurities typically introduced by the crucible system.

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