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Fabrication of Large-Area Organic Photovoltaics Using a Draw-Bar Coating Technique

Published online by Cambridge University Press:  22 February 2013

Cara J. Mulligan ,
Nicolas C. Nicolaidis ,
Ben Vaughan ,
Xiaojing Zhou ,
Warwick J. Belcher  and
Paul C. Dastoor
Cara J. Mulligan
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia.
Nicolas C. Nicolaidis
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia. CSIRO Energy Centre, Mayfield West, NSW 2304, Australia.
Ben Vaughan
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia. CSIRO Energy Centre, Mayfield West, NSW 2304, Australia.
Xiaojing Zhou
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia.
Warwick J. Belcher
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia.
Paul C. Dastoor
Affiliation:
Centre for Organic Electronics, University of Newcastle, Callaghan, NSW 2308, Australia.
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Abstract

Organic photovoltaic (OPV) devices were fabricated using a novel draw bar premetered coating technique, whereby a meniscus of fluid is dragged across a substrate to leave a trailing wet film. The results showed that coating thickness could be controlled by varying the coating speed, rod diameter, gap height, amount of solution injected, rod diameter, rod composition material and number of layers. Devices on PET with active areas of 10 cm2 and active layer thicknesses ranging from 35 to 475 nm were produced using the technique. Active layers of 160 nm were the optimum of thicknesses trialled, achieving typical best efficiencies around 0.4 %. Devices with films thinner than 90 nm did not function due to short-circuiting. The draw-bar coating method has the advantage of allowing controlled deposition of a wide range of film thicknesses with no solution wastage.

Keywords

coatingphotovoltaicorganic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1529: Symposium WW – Roll-to-Roll Processing of Electronics and Advanced Functionalities , 2012 , mrsf12-1529-ww06-12
Copyright
Copyright © Materials Research Society 2013

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