Al-Foil on Encapsulant for the Interconnection of Al-Metalized Silicon Solar Cells
- authored by
- Henning Schulte-Huxel, Susanne Blankemeyer, Robert Bock, Agnes Merkle, Sarah Kajari-Schröder, Rolf Brendel
- Abstract
We demonstrate the interconnection of silicon solar cells with evaporated aluminum back contacts using an aluminum foil which is attached to a silicone encapsulant. The aluminum-based mechanical and electrical laser interconnection (AMELI) process forms laser weld spots using single laser pulses. These laser welds resist high mechanical stresses and have a low electrical contact resistivity. No solder, conductive adhesives, or Ag-pastes are required for interconnection. We find the electrical contact resistivity to be below ρ c = 0.01 mΩ·cm2. The contact resistance is constant under accelerated aging of 300 humidity-freeze cycles. With a tensile testing machine, we measure tear-off stresses in the perpendicular direction of up to 380 kPa for our laser weld spots. We present a proof-of-concept module which consists of five n-type back-junction back-contact solar cells with a conversion efficiency of 20.4%. The unchanged fill factor FF and open circuit voltage V\rm oc verify a damage-and loss-free interconnection which is supported by electroluminescence measurements.
- Organisation(s)
-
Solar Energy Section
- External Organisation(s)
-
Institute for Solar Energy Research (ISFH)
Bosch Solar Energy AG
- Type
- Article
- Journal
- IEEE journal of photovoltaics
- Volume
- 3
- Pages
- 77-82
- No. of pages
- 6
- ISSN
- 2156-3381
- Publication date
- 09.08.2012
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Electrical and Electronic Engineering
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.1109/JPHOTOV.2012.2208096 (Access:
Closed)
