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R2R-printed inverted OPV modules--towards arbitrary patterned designs.

M Välimäki1, P Apilo, R Po

  • 1VTT Technical Research Centre of Finland Kaitoväylä 1, FIN-90571 Oulu, Finland. Marja.Valimaki@vtt.fi.

Nanoscale
|May 9, 2015
PubMed
Summary
This summary is machine-generated.

This study details roll-to-roll (R2R) printing of organic photovoltaic (OPV) modules using gravure and screen printing. Optimized R2R processes enable fabrication of large, arbitrarily shaped OPV modules with high functionality and power conversion efficiency.

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Area of Science:

  • Materials Science
  • Renewable Energy Technologies
  • Printing Technology

Background:

  • Organic photovoltaics (OPVs) offer potential for flexible and low-cost solar energy conversion.
  • Traditional OPV fabrication methods can be limited in scalability and design flexibility.
  • Roll-to-roll (R2R) printing presents a promising scalable manufacturing approach for OPVs.

Purpose of the Study:

  • To demonstrate the fabrication of R2R-printed OPV modules using gravure and rotary screen-printing.
  • To investigate the relationship between ink properties, printability, and layer morphology in R2R processes.
  • To evaluate the dimensional accuracy and repeatability of R2R-printed OPV modules with varying active areas.

Main Methods:

  • Utilized gravure printing and rotary screen-printing for fabricating multi-layer inverted OPV structures.
  • Analyzed rheological properties of inks to assess printability and inter-layer compatibility.
  • Evaluated dimensional accuracy of printed layers and repeatability across different module sizes (32.2 cm² to 96.5 cm²).

Main Results:

  • Achieved direct patterning of arbitrarily shaped OPV features, enhancing module design freedom.
  • Identified specific dimensional deviations in the transparent electron transport layer (+300 µm) and hole transport layer (-100 µm).
  • Fabricated 96.5 cm² R2R-printed OPV modules with a maximum power conversion efficiency of 2.1% (mean 1.8%).

Conclusions:

  • R2R printing techniques, including gravure and screen printing, are viable for fabricating functional OPV modules.
  • Optimization of ink properties and printing processes is crucial for achieving dimensional accuracy and high efficiency.
  • The developed R2R process demonstrates scalability and potential for producing large-area, custom-shaped OPV devices.