Soldering system

A method for manufacturing a solar cell, comprising:

• disposing a plurality of ribbons onto a plurality of bus bars in an article containing a photoelectric conversion layer and the bus bars, the bus bars being disposed on the photoelectric conversion layer and each ribbon contacting a bus bar;
• and
• soldering the ribbons to the bus bars to form a solar cell, the soldering comprising directing hot air simultaneously to the ribbons and to at least a portion of the photoelectric conversion layer not covered by a ribbon through a plurality of air exits defined by a plate, each air exit is configured to directing hot air to a ribbon or a portion of the photoelectric conversion layer not covered by a ribbon;
• wherein each air exit for directing the hot air to the ribbon is in the plate and is configured to form an angle ranging from about 5° to about 60° with a vertical axis of the plate, and each air exit for directing the hot air to at least a portion of the photoelectric conversion layer not covered by the ribbon is in the plate and is generally parallel to the vertical axis of the plate.