1. Industrial LCP selective emitter solar cells with plated contacts
- Author
-
S. Kleinschmidt, G. Cimiotti, Filip Granek, C. Fleischmann, Daniel Kray, M. Sailer, N. Bay, A. Träger, H. Kühnlein, N. Kösterke, A. Lösel, and Hartmut Nussbaumer
- Subjects
Materials science ,business.industry ,Doping ,Conductivity ,Aspect ratio (image) ,law.invention ,Optics ,law ,Plating ,Solar cell ,Figure of merit ,Optoelectronics ,business ,Electroplating ,Common emitter - Abstract
The investigation of different selective emitter (SE) approaches [1–3] is a current trend in solar cell manufacturing. The incorporation of a local high phosphorous doping underneath the front contact grid allows for the use of high-sheet resistance illuminated emitters that combine low recombination and improved blue response. Further efficiency increase compared to the standard screen-printed solar cell is achieved via plated contacts [4–5] that feature better aspect ratio and optical properties [6], higher line conductivity and smaller width [5] compared to screen-printed contacts. In this paper we present detailed technological requirements for next-generation front side metallization as well as experimental results of the RENA high-efficiency metallization cluster consisting of Laser Chemical Processing (LCP) and Ni-Ag light-induced plating (LIP). It becomes clear that efficiency on cell level is not the only figure of merit for a successful product and that the combination of SE with plating has a much higher potential for increasing cell efficiency than the metallization of SE via screen-printing.
- Published
- 2010
- Full Text
- View/download PDF