Send to

Choose Destination
J Am Chem Soc. 2018 Jul 18;140(28):8934-8943. doi: 10.1021/jacs.8b05038. Epub 2018 Jul 9.

Morphology Optimization via Side Chain Engineering Enables All-Polymer Solar Cells with Excellent Fill Factor and Stability.

Author information

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , People's Republic of China.
Center for Polymers and Organic Solids , University of California , Santa Barbara , California 93106 , United States.
Institute of Materials for Electronics and Energy Technology (i-MEET) , Friedrich-Alexander-Universität Erlangen-Nürnberg , Martensstrasse 7 , 91058 Erlangen , Germany.
Molecular Materials and Nanosystems, Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands.
Department of Physics and Astronomy , Shanghai Jiao Tong University , Shanghai 200240 , People's Republic of China.
Bavarian Center for Applied Energy Research (ZAE Bayern) , Immerwahrstrasse 2 , 91058 Erlangen , Germany.


All-polymer solar cells (all-PSCs) composed of conjugated polymers as both donor and acceptor components in bulk heterojunction photoactive layers have attracted increasing attention. However, it is a big challenge to achieve optimal morphology in polymer:polymer blends. In response, we report herein a new strategy to adjust the nanoscale organization for all-PSCs. Specifically, side chain engineering of the well-known naphthalene diimide (NDI)-based polymer N2200 is modulated by introducing a fraction of linear oligoethylene oxide (OE) side chains to replace branched alkyl chains on the NDI units and by synthesizing a series of NDI-based polymer acceptors NOE x, where x is the percentage of OE chain substituted NDI units relative to total NDI units. Compared to the reference polymer NOE0, OE-chain-containing polymer NOE10 offers a much higher power conversion efficiency (PCE) of 8.1% with a record high fill factor (FF) of 0.75 in all-PSCs. Moreover, the NOE10-based all-PSC exhibits excellent long-term and thermal stabilities with >97% of the initial PCE being maintained after 300 h of aging at 65 °C. This work demonstrates an effective morphology optimization strategy to achieve highly efficient and stable all-PSCs and shows the excellent potential of NOE10 as an alternative to commercially available acceptor polymers N2200.


Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center