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Efficient n‐Doping of Polymeric Semiconductors through Controlling the Dynamics of Solution‐State Polymer Aggregates
Author(s) -
Xiong Miao,
Yan Xinwen,
Li JiaTong,
Zhang Song,
Cao Zhiqiang,
Prine Nathaniel,
Lu Yang,
Wang JieYu,
Gu Xiaodan,
Lei Ting
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202015216
Subject(s) - miscibility , dopant , doping , materials science , polymer , chemical engineering , semiconductor , chemical physics , polymer chemistry , optoelectronics , chemistry , composite material , engineering
Abstract Doping of polymeric semiconductors limits the miscibility between polymers and dopants. Although significant efforts have been devoted to enhancing miscibility through chemical modification, the electrical conductivities of n‐doped polymeric semiconductors are usually below 10 S cm −1 . We report a different approach to overcome the miscibility issue by modulating the solution‐state aggregates of conjugated polymers. We found that the solution‐state aggregates of conjugated polymers not only changed with solvent and temperature but also changed with solution aging time. Modulating the solution‐state polymer aggregates can directly influence their solid‐state microstructures and miscibility with dopants. As a result, both high doping efficiency and high charge‐carrier mobility were simultaneously obtained. The n‐doped electrical conductivity of P(PzDPP‐CT2) can be tuned up to 32.1 S cm −1 . This method can also be used to improve the doping efficiency of other polymer systems (e.g. N2200) with different aggregation tendencies and behaviors.