Pilot production of highly efficient metal catalyzed textured diamond wire sawn mc-Si solar cells combined with nickel-copper plated front contact processing. (September 2017)

• Record Type: Journal Article
• Authors: Pysch, D.; Bay, N.; Burschik, J.; Dümpelfeld, W.; Kühnlein, H.; Lee, B.; Letize, A.; Passig, M.; Qu, X.; Sieber, M.; Vosteen, K.
• Is Part Of: Energy procedia. Volume 130(2017)
• Page Start: 14
• Page End: 22
• Publication Date: 2017-09
• Subjects: Cu plating -- Light-induced plating -- Diamond-wire saw -- multicrystalline silicon texture -- metal catalyzed texture; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.09.407
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: This paper presents first results of combining two promising future technologies: i) metal catalyzed textured diamond-wire sawn (DWS) mc-Si wafers and ii) nickel-copper-silver (Ni/CuAg) plated front contact processing. Results of first optimizations of laser patterning, annealing and module string soldering are presented. A 60-cell module with a power output of 266 W was successfully manufactured. The pseudo fill-factor (pFF) has been identified as the parameter with the highest potential for further improvements. A very promising approach is moving from an emitter profile that is mainly adapted to silver paste properties to an optimized emitter profile for Ni/Cu/Ag-plated contacts. The idea is to reduce the surface doping concentration (reduces Auger recombination) and increase the junction depth (increased pFF and FF).