Efficient Tandem Polymer Solar Cells Fabricated by All-Solution Processing

  title={Efficient Tandem Polymer Solar Cells Fabricated by All-Solution Processing},
  author={Jin Young Kim and Kwanghee Lee and Nelson E. Coates and Daniel Moses and Thuc‐Quyen Nguyen and Mark Dante and Alan J. Heeger},
  pages={222 - 225}
Tandem solar cells, in which two solar cells with different absorption characteristics are linked to use a wider range of the solar spectrum, were fabricated with each layer processed from solution with the use of bulk heterojunction materials comprising semiconducting polymers and fullerene derivatives. A transparent titanium oxide (TiOx) layer separates and connects the front cell and the back cell. The TiOx layer serves as an electron transport and collecting layer for the first cell and as… 
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