Manufacture of thin solar cells based on ink printing technology
Semiconductor ink is disclosed for use in printing thin film solar cell absorber layer. The semiconductor ink is particularly useful in fabricating multi junction tandem solar cell wherein a high bandgap absorber layer as the top cell and a lower band gap absorber layer as the bottom cell. The ink contains ingredients of IB-IIIA-VIA compound with micron-sized semiconductor as the main building “bricks” and nano-sized semiconductor as the binder to fulfill the formation of smooth semiconductive film with micron-sized crystal grain size. Thus formed ink can be used in direct printing for the fabrication of low cost high performance solar cells.
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Xiao-Chang Charles
Li