Origin of the efficiency enhancement in ferroelectric functionalized organic solar cells
article
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. © 2011 American Institute of Physics.
Topics
TNO Identifier
461467
ISSN
0003-6951
Source
Applied Physics Letters, 98(18)
Article nr.
No.: 183301
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