A thermally activated and highly miscible dopant for n-type organic thermoelectrics

Chi-Yuan Yang, Yi-Fan Ding, Dazhen Huang, Jue Wang, Ze-Fan Yao, Chun-Xi Huang, Yang Lu, Hio-Ieng Un, Fang-Dong Zhuang, Jin-Hu Dou, Chong-an Di, Daoben Zhu, Jie-Yu Wang, Ting Lei and Jian Pei ()
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Chi-Yuan Yang: Peking University
Yi-Fan Ding: Peking University
Dazhen Huang: Chinese Academy of Sciences
Jue Wang: Peking University
Ze-Fan Yao: Peking University
Chun-Xi Huang: Peking University
Yang Lu: Peking University
Hio-Ieng Un: Peking University
Fang-Dong Zhuang: Peking University
Jin-Hu Dou: Peking University
Chong-an Di: Chinese Academy of Sciences
Daoben Zhu: Chinese Academy of Sciences
Jie-Yu Wang: Peking University
Ting Lei: College of Engineering, Peking University
Jian Pei: Peking University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract N-doping plays an irreplaceable role in controlling the electron concentration of organic semiconductors thus to improve performance of organic semiconductor devices. However, compared with many mature p-doping methods, n-doping of organic semiconductor is still of challenges. In particular, dopant stability/processability, counterion-semiconductor immiscibility and doping induced microstructure non-uniformity have restricted the application of n-doping in high-performance devices. Here, we report a computer-assisted screening approach to rationally design of a triaminomethane-type dopant, which exhibit extremely high stability and strong hydride donating property due to its thermally activated doping mechanism. This triaminomethane derivative shows excellent counterion-semiconductor miscibility (counter cations stay with the polymer side chains), high doping efficiency and uniformity. By using triaminomethane, we realize a record n-type conductivity of up to 21 S cm−1 and power factors as high as 51 μW m−1 K−2 even in films with thicknesses over 10 μm, and we demonstrate the first reported all-polymer thermoelectric generator.

Date: 2020
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DOI: 10.1038/s41467-020-17063-1

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