The Critical Choice of PEDOT:PSS Additives for Long Term Stability of Roll-to-Roll Processed OPVs

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The Critical Choice of PEDOT:PSS Additives for Long Term Stability of Roll-to-Roll Processed OPVs

Roth, Berenger / dos Reis Benatto, Gisele A. / Corazza, Michael / Söndergaard, Roar R. / Gevorgyan, Suren A. / Jörgensen, Mikkel / Krebs, Frederik C.

Abstract

The impact of additives mixed with poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) on the stability of organic photovoltaic modules is investigated for fully ambient roll-to-roll (R2R) processed indium tin oxide free modules. Four different PEDOT:PSS inks from two different suppliers are used. The modules are manufactured directly on barrier foil without a UV filter to accelerate degradation and enable completion of the study in a reasonable time span. The modules are subjected to stability testing following well-established protocols developed by the international summit on organic photovoltaic stability (ISOS). For the harsh indoor test (ISOS-L-3) only a slight difference in stability is observed between the different modules. During both ISOS-L-3 and ISOS-D-3 one new failure mode is observed as a result of tiny air inclusions in the barrier foil and a R2R method is developed to detect and quantify these. During outdoor operation (ISOS-O-1) the use of ethylene glycol (EG) as an additive is found to drastically increase the operational stability of the modules as compared to dimethylsulfoxide (DMSO) and a new failure mode specific to modules with DMSO as the additive is identified. The data are extended in an ongoing experiment where DMSO is used as additive for long-term outdoor testing in a solar park.

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Document information

Title :

The Critical Choice of PEDOT:PSS Additives for Long Term Stability of Roll-to-Roll Processed OPVs

Contributors:

Roth, Berenger (author) / dos Reis Benatto, Gisele A. (author) / Corazza, Michael (author) / Söndergaard, Roar R. (author) / Gevorgyan, Suren A. (author) / Jörgensen, Mikkel (author) / Krebs, Frederik C. (author)

Published in:

Advanced Energy Materials ; 5 , 9 ; 1-10

Publication date :

2015

Size :

10 Seiten

ISSN :

1614-6832

DOI :

https://doi.org/10.1002/aenm.201401912

Type of media :

Article (Journal)