Title :
Roller printed multicrystalline silicon solar cells with 16% efficiency and 25 μm finger width
Author :
Huster, F. ; Gerhards, C. ; Spiegel, M. ; Fath, P. ; Bucher, E.
Author_Institution :
Dept. of Phys., Konstanz Univ., Germany
Abstract :
The authors present results on multicrystalline silicon solar cells metallized by the novel roller printing technique. An efficiency of 16.3% has been achieved on 10×10 cm2 Baysix multicrystalline silicon in a low cost process, applying a homogeneous 35 Ω/sq emitter. The roller printed fingers show excellent properties, namely an optical finger width of 25 μm, leading to a total finger shadowing of only 1.5%. Due to nonoptimal contact resistances the mean value of the fill factor of the roller printed cells is only about 73%. Device simulations predict for roller printed cells with low contact resistances and an optimized finger spacing a cell efficiency of 16.8% and an efficiency gain of 0.7% over screen printed cells. On a 50 Ω/sq emitter even a 17% cell efficiency seems to be achievable after optimization of the firing conditions
Keywords :
contact resistance; elemental semiconductors; metallisation; semiconductor device manufacture; silicon; solar cells; 10 cm; 16.3 percent; 16.8 percent; 25 mum; Baysix multicrystalline silicon; Si; device simulations; efficiency gain; fill factor; finger shadowing; firing conditions optimisation; homogeneous emitter; metallisation process; optical finger width; roller printed multicrystalline silicon solar cells; Costs; Etching; Fingers; Metallization; Photovoltaic cells; Physics; Printing; Silicon; Stimulated emission; Wheels;
Conference_Titel :
Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-5772-8
DOI :
10.1109/PVSC.2000.915790
