Abstract
We have investigated the efficiency enhancement of organic solar cells upon incorporation of a thin ferroelectric polymer layer. For non-Ohmic contacts the enhancement is due to an increased open circuit voltage, which is, however, independent of the ferroelectric polarization direction. Ferroelectricity cannot play a role due to depolarization and charge compensation. The same improvement is also obtained with a non-ferroelectric fluorinated polymer. The data unambiguously show that the improved efficiency is solely due to improvement of the cathode. The fluorinated polymer layer plays the role of LiF in an optimized solar cell.
Original language | English |
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Article number | 183301 |
Journal | Applied Physics Letters |
Volume | 98 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2 May 2011 |
Funding
We would like to acknowledge Jan Harkema and Mengyuan Li for technical assistance, and financial support by Zernike Institute for Advanced Materials, the EC project under FP7 Contract No. 212311, ONE-P and the Dutch Polymer Institute (DPI) under Project DPI No. 660.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)