Building blocks for back-junction back-contacted cells and modules with ion-implanted poly-Si junctions
- verfasst von
- Robby Peibst, Udo Romer, Yevgeniya Larionova, Henning Schulte-Huxel, Tobias Ohrdes, Michael Haberle, Bianca Lim, Jan Krugener, Daniel Stichtenoth, Tobias Wutherich, Claus Schollhorn, John Graff, Rolf Brendel
- Abstract
We propose a process for a back-junction back-contacted solar cell (including module interconnection) combining a high efficiency potential and a lean process flow. This structure offers potential for (i) a high Jsc - no optical shading losses due to the absence of front-side metallization and minimized absorption losses at the cell front-side, (ii) a high Voc - excellent passivation including 'passivated contacts' based on poly-Si/c-Si junctions, and (iii) a high FF - large area contacts with low contact resistance and the absence of busbar losses due to a two-layer metallization. A lean process flow becomes feasible by utilizing two enabling technologies - in situ patterned ion implantation and module interconnection by laser welding (AMELI). We present experimental results for the main building blocks: (1) Patterned ion implantation yields an excellent recombination behavior homogeneously on 6″, (2) Ion-implanted poly-Si / c-Si junctions enabling Voc values up to 742 mV and J0e values down to 1.3fA/cm2, (3) Al2O3 front-side passivation enabling Jsc values up to 41.8 mA/cm2 and IQE values > 1 for λ < 350 nm, and (4) busbarless, silver-free AMELI two-layer interconnection. As an intermediate step, we fabricated ion-implanted BJBC cells with conventional junctions and metallization with efficiencies up to 22.1% on 6″.
- Organisationseinheit(en)
-
Institut für Materialien und Bauelemente der Elektronik
- Externe Organisation(en)
-
Institut für Solarenergieforschung GmbH (ISFH)
Bosch Solar Energy AG
Applied Materials Incorporated
- Typ
- Aufsatz in Konferenzband
- Seiten
- 852-856
- Anzahl der Seiten
- 5
- Publikationsdatum
- 15.10.2014
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Elektrotechnik und Elektronik, Elektronische, optische und magnetische Materialien
- Ziele für nachhaltige Entwicklung
- SDG 7 – Erschwingliche und saubere Energie
- Elektronische Version(en)
-
https://doi.org/10.1109/pvsc.2014.6925049 (Zugang:
Geschlossen)
