Modified buffer layers for polymer photovoltaic devices

Chu Jung Ko*, Yi Kai Lin, Fang-Chung Chen, Chi Wei Chu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

154 Scopus citations


The influence of anode buffer layers on the performance of polymer photovoltaic 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 device resistance. The results confirm that the device improvement is due to the reduction of series resistance of the PEDOT:PSS after the mannitol doping.

Original languageEnglish
Article number063509
JournalApplied Physics Letters
Issue number6
StatePublished - 5 Feb 2007

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