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Updated: May 12, 2026

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Efficient tandem and triple-junction polymer solar cells.

Weiwei Li¹, Alice Furlan, Koen H Hendriks

¹Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

Journal of the American Chemical Society

|April 3, 2013

Summary

Researchers developed new polymer solar cells achieving 8.9% and 9.6% power conversion efficiencies. These high-performance devices utilize novel small and wide band gap semiconducting polymers.

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Published on: September 12, 2014

Area of Science:

Materials Science
Organic Electronics
Renewable Energy

Background:

Polymer solar cells offer a promising alternative to silicon-based photovoltaics due to their flexibility and low manufacturing costs.
Achieving high power conversion efficiencies (PCEs) in polymer solar cells remains a key challenge for commercial viability.

Purpose of the Study:

To develop and characterize novel semiconducting polymers for high-efficiency tandem and triple-junction polymer solar cells.
To investigate the impact of polymer design, including molecular weight and band gap, on device performance.

Main Methods:

Synthesis of a new high molecular weight, small band gap semiconducting polymer.
Fabrication of tandem and triple-junction solar cells incorporating the new polymer and a matching wide band gap polymer.
Performance characterization of the fabricated solar cells, including power conversion efficiency measurements.

Main Results:

Demonstrated tandem polymer solar cells with a PCE of 8.9%.
Achieved triple-junction polymer solar cells with a PCE of 9.6%.
The newly designed polymers enabled efficient charge generation and transport in multi-junction devices.

Conclusions:

The developed high molecular weight, small band gap polymer is suitable for high-efficiency multi-junction polymer solar cells.
The results highlight the potential of tailored polymer design for advancing organic photovoltaic technology.
Achieved PCEs represent significant progress in the field of polymer-based solar energy conversion.