Selective emitter technology global implantation through the use of low ultraviolet cut-off EVA

- Selective emitter technology PV modules fabricated in an industrial facility.
- Different ultraviolet cut-off EVA films have been processed.
- A suitable EVA selection leads to a power enhancement of 0.94 W per PV module.

Selective emitter diffusion technology has demonstrated a direct PV cell efficiency increase, due to a good ohmic contact and high blue response. These PV devices will be assembled to fabricate the final and commercial PV modules where the power enhancement is the most valuable one. The traditional encapsulant material is ethylene-vinyl-acetate (EVA) which ultraviolet wavelength cut off is placed in the region where selective emitter technology improvement is performed. Photovoltaic industry has developed innovate materials to overcome these issues. Among them, a low ultraviolet cut off EVA can be easily acquired. Our study demonstrates that with the correct PV module encapsulant configuration, part of the developed PV cell efficiency improvement related to selective emitter technology can be successfully translated at the end of the value chain; that is, the final PV module.

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