Sequential Cyanation of Polythiophenes: Tuning Charge Carrier Polarity in Organic Electrochemical Transistors
|Corresponding Author||Feng，Kui; Woo，Han Young; Guo，Xugang|
Polythiophenes, built on head-to-head (HH) linked 3,3′-oligomer ethylene glycol-2,2′-bithiophene (gT2), have simple chemical structure, good backbone planarity, and relatively high-lying the lowest unoccupied molecular orbital (LUMO) energy levels, hence showing excellent p-type performance in organic electrochemical transistors (OECTs) with µC* of several hundred F cm V s. In this study, sequential cyano substitution is utilized to enable transformation of charge carrier polarity from p-type to n-type in OECTs, based on the parent polythiophene g4T2-T2. With the increase of cyano group number, the polythiophenes exhibit gradually lowered LUMO levels from −2.55 to −3.90 eV. As a result, from g4T2-T2 to CNg4T2-CNT2, the p-type performance dramatically diminishes accomplished by the enhancement of n-type one when applied in OECTs. To the authors' delight, polymer CNg4T2-CNT2 with the highest content of cyano groups exhibits a remarkable n-type µC* of 27.01 F cm V s and high g of 6.75 S cm with negligible p-type character. This study demonstrates that sequential cyano substitution provides a powerful approach for developing high-performance n-type polymers for OECT applications.
First ; Corresponding
Songshan Lake Materials Laboratory[2021SLABFK03] ; Shenzhen Innovation Commission of Science and Technology[JCYJ20220818100617037] ; National Natural Science Foundation of China["22275078","22005135"] ; National Research Foundation of Korea["2019R1A6A1A11044070","2020M3H4A3081814"]
|WOS Research Area|
Science & Technology - Other Topics ; Materials Science ; Physics
Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
|WOS Accession No|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Department of Materials Science and Engineering,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
2.Department of Chemistry,Korea University,Seoul,136-713,South Korea
3.Department of Chemistry,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
4.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology (SUSTech),Shenzhen,Guangdong,518055,China
5.Songshan Lake Materials Laboratory,Dongguan,Guangdong,523808,China
|First Author Affilication||Department of Materials Science and Engineering|
|Corresponding Author Affilication||Department of Materials Science and Engineering; Academy for Advanced Interdisciplinary Studies|
|First Author's First Affilication||Department of Materials Science and Engineering|
Ma，Suxiang,Wang，Junwei,Wu，Wenchang,et al. Sequential Cyanation of Polythiophenes: Tuning Charge Carrier Polarity in Organic Electrochemical Transistors[J]. Advanced Electronic Materials,2023.
Ma，Suxiang.,Wang，Junwei.,Wu，Wenchang.,Wu，Ziang.,Zhang，Hao.,...&Guo，Xugang.(2023).Sequential Cyanation of Polythiophenes: Tuning Charge Carrier Polarity in Organic Electrochemical Transistors.Advanced Electronic Materials.
Ma，Suxiang,et al."Sequential Cyanation of Polythiophenes: Tuning Charge Carrier Polarity in Organic Electrochemical Transistors".Advanced Electronic Materials (2023).
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