Back-contact solar cells and methods for fabrication

Details Back-contact solar cells and methods for fabrication Back-contact solar cells and methods for fabrication

H - Electricity

01

L

H01L 21/00 (2006.01)

Patent

CA 2596831

Methods for fabrication of emitter wrap through (EWT) back-contact solar cells and cells made by such methods. Certain methods provide for higher concentration of dopant in conductive vias compared to the average dopant concentration on front or rear surfaces, and provided increased efficiency. Certain methods provide for selective doping to holes for forming conductive vias by use of printed dopant pastes. Other methods provide for use of spin-on glass substrates including dopant.

L'invention concerne des procédés de fabrication de photopiles à contact arrière émettrices (EWT) et des piles fabriquées selon ces procédés. Certains procédés fournissent une concentration plus élevée de dopant dans des trous de liaison conducteurs en comparaison avec la concentration de dopant moyenne sur des surfaces avant ou arrière, et fournissent une meilleure efficacité. Certains procédés fournissent un dopant sélectif à des orifices afin de former des trous de liaison au moyen de pâtes dopantes imprimées. D'autres procédés concernent l'utilisation de substrats en verre par rotation contenant un dopant.

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