Modified buffer layers for polymer photovoltaic devices
- 5 February 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (6), 063509
- https://doi.org/10.1063/1.2437703
Abstract
The influence of anodebuffer layers on the performance of polymerphotovoltaic devices based on blends of poly(3-hexylthiophene) and [6,6]-phenyl-C-61-buytyric acid methyl ester has been investigated. The buffer layers consist of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT-PSS) doped with different concentrations of mannitol. Improved power conversion efficiency, up to 5.2%, has been observed by reducing the resistance of PEDOT:PSS after doping. One extrapolation method has been developed to exclude the resistance from the connection of the electrodes from the total deviceresistance. The results confirm that the device improvement is due to the reduction of series resistance of the PEDOT:PSS after the mannitol doping.Keywords
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