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Natcore Makes Major Advancements In Black Silicon, Discovers Compelling New Application

RED BANK, N.J., April 11, 2013 /PRNewswire/ --  Natcore Technology Inc. (TSX-V: NXT; NTCXF.PK) has made major strides in advancing its black silicon solar cells to commercial levels of efficiency and, as part of its development process, has discovered that its technology could finally provide the industry with a low-cost selective emitter application.

Natcore's initial black silicon solar cells, the first full-size black silicon cells produced using a low-cost, scalable manufacturing process, had efficiencies of approximately 1%, as compared with average efficiencies for commercial cells of approximately 17%.

Through refinement of its in-lab production process, and despite the lack of a key piece of equipment, Natcore's technical staff has been able to achieve efficiencies as high as 14.7%.

These results have been achieved without an adequate diffusion furnace to control phosphorus diffusion into the solar cells' silicon surfaces. Natcore has now obtained and installed a fully capable diffusion furnace, with commissioning of this crucial piece of equipment having begun the week of April 1. The company's technical staff is confident that this diffusion furnace will allow for significant improvements in the efficiencies of its black silicon cells.

Importantly, Natcore's staff has discovered that its proprietary liquid phase deposition (LPD) may make a low-cost selective emitter application available to the solar industry. Selective emitter technology is a long-sought enhancement to solar cells in which the regions under a cell's front contacts are heavily doped to improve the electrical connection, while the remaining emitter surface is lightly doped to promote better efficiency.

Selective emitter applications have been proven to significantly increase solar cell efficiencies, but a low-cost, highly scalable process has remained elusive to industry. Theoretically, Natcore's LPD process could make this achievable, and early results from experiments using the company's newly installed diffusion furnace have been very encouraging.

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