The Korean group says the new standard, verified by German research body Fraunhofer ISE, was set using conventional 156mm commercial-grade p-type silicon wafers.
Researchers at HHI fine-tuned existing LDSE (laser-doped selective emitter) technology to create the new solar cell with copper plating.
The record-setting copper-front-contact selective-emitter cell has a full-area aluminum-alloyed back electrode.
As usual with LDSE a laser-based selective doping process is combined with a plating technology, but to form copper contacts at the front – rather than traditional silver ones – thereby cutting the cost of production by 10-30% compared to other six-inch cell designs.
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