Boosting stability and charge transfer of conducting polymer poly(benzodifurandione) (PBFDO) through complementary topology.

Doping n-type poly(benzodifurandione) (PBFDO) with choline chloride (ChCl) yields 2.8-fold higher high-temperature resilience and improved charge/ion transport.

• Why it matters: Despite record electrical conductivity, PBFDO’s thermal robustness and charge/ion transport are still inadequate for practical devices.
• What they did: The authors use ChCl doping to drive out-of-plane cation intercalation and in-plane π-π densification, producing submicrometer phase separation, then test conductivity and ion diffusion and validate in OECTs.
• The result: PBFDO-ChCl shows 1.6-fold higher sheet conductance and a 15.9-fold reduction in ion diffusion resistance, with OECTs confirming the enhanced performance.

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