Transfer-Printed N-Type Conductive Polymer as Top Electrode for High-Efficiency Fully Solution-Processed Organic...

Area of Science:

• Materials Science
• Organic Electronics
• Photovoltaics

Background:

• Solution-printable processing is advantageous for organic solar cells (OSCs).
• Developing printable top electrodes is crucial for fully solution-processed organic photovoltaics.
• Current methods face challenges like structural damage and poor interfacial contact.

Purpose of the Study:

• To introduce a novel, solution-processable n-type conductive polymer electrode for OSCs.
• To enable robust, nondestructive top electrode fabrication via transfer printing.
• To enhance OSC performance and thermal insulation properties.

Main Methods:

• Utilized a combined n-type conductive polymer, poly(3,7-dihydrobenzo[1,2-b:4,5-b']difuran-2,6-dione):poly(2-ethyl-2-oxazoline) (PBFDO:PEOx), as a top electrode.
• Employed transfer printing for fabricating the PBFDO:PEOx top electrode.
• Investigated the electrode's conductivity, work function, and protective capabilities.

Main Results:

• Achieved a power conversion efficiency (PCE) of 14.2% in OSCs with PBFDO:PEOx/AgNWs printed top electrodes.
• Demonstrated over 80% infrared blocking efficiency, indicating thermal insulation properties.
• Observed promotion of charge transfer and extraction, reduced recombination, and minimized energy loss.

Conclusions:

• The PBFDO:PEOx electrode offers a promising route for fully solution-processed OSCs.
• This approach facilitates robust, nondestructive fabrication of printable top electrodes.
• The developed electrode enhances device performance and provides thermal insulation.