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Sequential Doping of Ladder-Type Conjugated Polymers for Thermally Stable n-Type Organic Conductors.


ABSTRACT: Doping of organic semiconductors is a powerful tool to optimize the performance of various organic (opto)electronic and bioelectronic devices. Despite recent advances, the low thermal stability of the electronic properties of doped polymers still represents a significant obstacle to implementing these materials into practical applications. Hence, the development of conducting doped polymers with excellent long-term stability at elevated temperatures is highly desirable. Here, we report on the sequential doping of the ladder-type polymer poly(benzimidazobenzophenanthroline) (BBL) with a benzimidazole-based dopant (i.e., N-DMBI). By combining electrical, UV-vis/infrared, X-ray diffraction, and electron paramagnetic resonance measurements, we quantitatively characterized the conductivity, Seebeck coefficient, spin density, and microstructure of the sequentially doped polymer films as a function of the thermal annealing temperature. Importantly, we observed that the electrical conductivity of N-DMBI-doped BBL remains unchanged even after 20 h of heating at 190 °C. This finding is remarkable and of particular interest for organic thermoelectrics.

SUBMITTER: Wang S 

PROVIDER: S-EPMC7735673 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Sequential Doping of Ladder-Type Conjugated Polymers for Thermally Stable n-Type Organic Conductors.

Wang Suhao S   Ruoko Tero-Petri TP   Wang Gang G   Riera-Galindo Sergi S   Hultmark Sandra S   Puttisong Yuttapoom Y   Moro Fabrizio F   Yan Hongping H   Chen Weimin M WM   Berggren Magnus M   Müller Christian C   Fabiano Simone S  

ACS applied materials & interfaces 20201112 47


Doping of organic semiconductors is a powerful tool to optimize the performance of various organic (opto)electronic and bioelectronic devices. Despite recent advances, the low thermal stability of the electronic properties of doped polymers still represents a significant obstacle to implementing these materials into practical applications. Hence, the development of conducting doped polymers with excellent long-term stability at elevated temperatures is highly desirable. Here, we report on the se  ...[more]

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