Laser contact openings for local poly-Si-metal contacts enabling 26.1%-efficient POLO-IBC solar cells
- authored by
- Felix Haase, Christina Hollemann, Sören Schäfer, Agnes Merkle, Michael Rienäcker, Jan Krügener, Rolf Brendel, Robby Peibst
- Abstract
We demonstrate damage-free laser contact openings in silicon oxide layers on polycrystalline silicon on oxide (POLO) passivating contacts. A pulsed UV-laser evaporates the upper part of the polycrystalline silicon layer, lifting off the silicon oxide layer on top. On n-type POLO (and p-type POLO, respectively) samples a saturation current density of 2 fA cm−2 (6 fA cm−2) and an implied open-circuit voltage of 733 mV (727 mV) are achieved with a laser contact opening area fraction of 12.3% (8.7%). The application of this ablation process in an interdigitated back contact solar cell leads to an independently confirmed power conversion efficiency of 26.1%. The excellent contact quality of the laser contact openings is proven by the low series resistance of 0.1 Ω cm2 on the solar cell with a contact area of only 3%.
- Organisation(s)
-
Institute of Electronic Materials and Devices
Laboratory of Nano and Quantum Engineering
Institute of Solid State Physics
- External Organisation(s)
-
Institute for Solar Energy Research (ISFH)
- Type
- Article
- Journal
- Solar Energy Materials and Solar Cells
- Volume
- 186
- Pages
- 184-193
- No. of pages
- 10
- ISSN
- 0927-0248
- Publication date
- 11.2018
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment, Surfaces, Coatings and Films
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1016/j.solmat.2018.06.020 (Access:
Closed)
