Abstract
We developed a new Pb-free Ag paste with a SnOP2O5 glass frit for front contact electrodes of crystalline silicon solar cells. First, we synthesized SnOP2O5 glass frits with various compositions, whose glass transition temperatures were 225–245 °C, by using a melt-quenching method. It was experimentally verified that the glass component SnO etched through the silicon nitride anti-reflection coating on the Si emitter. Then, four kinds of Ag pastes with various SnOP2O5 glass frits were prepared, screen-printed on a Si emitter, and fired to fabricate solar cells. The composition of the SnOP2O5 glass frit affected the surface and interfacial morphology and microstructure of sintered Ag grids, which played an important role in the series resistance and photovoltaic properties of the solar cells. It was worth noting that the cells fabricated with SnO-based Ag pastes revealed no glass layer at the interface between the Ag grids and Si emitter. This differed from cells fabricated with Ag pastes containing Pb- or Bi-based glass frits. The highest efficiency of 7.2% was achieved for cells fabricated with the Ag paste containing 67SnO33P2O5 (mol%) glass frit at a firing temperature of 950 °C and a time of 5 min. This was because this Ag paste possessed the densest structure and lowest interfacial contact resistance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
