Aluminum Evaporation and Etching for the Front-Side Metallization of Solar Cells
- authored by
- Stefan Eidelloth, Frank Heinemeyer, Daniel Münster, Rolf Brendel
- Abstract
In this paper, we report and discuss several strategies to produce solar cell front contacts by full-area metallization and etching (FAME). Our chemically structured contacts consume less expensive silver than screen-printed contacts. As a proof of principle for the FAME approach, we present a 148.6-cm 2-sized silicon solar cell that has about 100-μm-wide front-side fingers. These fingers consist of a 15-μm-thick evaporated aluminum layer, supplying the electrical conductance, and a sputtered capping stack (200 nm Ni:V plus 20 nm Ag), providing solderability. The entire metal stack is first deposited on the full area of the solar cells, then locally protected by a wax pattern, and subsequently etched with commercial Ni:V etch and NaOH. The efficiency of the best solar cell is 19.3%, the fill factor is 78%, the open-circuit voltage is 666 mV, and the short-circuit current density is 37.1 mA/cm2.
- Organisation(s)
-
Solar Energy Section
- External Organisation(s)
-
Institute for Solar Energy Research (ISFH)
- Type
- Article
- Journal
- IEEE Journal of Photovoltaics
- Volume
- 3
- Pages
- 702-708
- No. of pages
- 7
- ISSN
- 2156-3381
- Publication date
- 30.01.2013
- 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.2013.2239361 (Access:
Closed)
