Efficient light harvesting in multiple-device stacked structure for polymer solar cells
- 6 February 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (6) , 064104
- https://doi.org/10.1063/1.2172741
Abstract
We demonstrate a multiple-device stacked structure of polymer solar cells for efficient light harvesting. Two polymer photovoltaic cells are stacked together and connected in series or in parallel to achieve a tandem structure. In this two-cell structure, a multilayer semitransparent electrode, made of lithium fluoride (LiF)/aluminum (Al)/gold (Au), is used as the top contact in the bottom cell to efficiently transmit the unabsorbed photons to the upper cell. Maximum transparency of up to 80% is achieved for the semitransparent cathode. Upon stacking, the open-circuit voltage and the short-circuit current are almost doubled compared to a single cell.Keywords
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