High-Performance n-Type Organic Thermoelectrics with Exceptional Conductivity by Polymer-Dopant Matching

Gamez-Valenzuela, Sergio1; Li, Jianfeng1; Ma, Suxiang1; Jeong, Sang Young2; Woo, Han Young2; Feng, Kui1; Guo, Xugang1

2024-09-01

10.1002/anie.202408537

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   影响因子和分区

1433-7851

1521-3773

["Achieving high electrical conductivity (sigma) and power factor (PF) simultaneously remains a significant challenge for n-type organic themoelectrics (OTEs). Herein, we demonstrate the state-of-the-art OTEs performance through blending a fused bithiophene imide dimer-based polymer f-BTI2g-SVSCN and its selenophene-substituted analogue f-BSeI2g-SVSCN with a julolidine-functionalized benzimidazoline n-dopant JLBI, vis-& agrave;-vis when blended with commercially available n-dopants TAM and N-DMBI. The advantages of introducing a more lipophilic julolidine group into the dopant structure of JLBI are evidenced by the enhanced OTEs performance that JLBI-doped films show when compared to those doped with N-DMBI or TAM. In fact, thanks to the enhanced intermolecular interactions and the lower-lying LUMO level enabled by the increase of selenophene content in polymer backbone, JLBI-doped films of f-BSeI2g-SVSCN exhibit a unprecedent sigma of 206 S cm-1 and a PF of 114 mu W m-1 K-2. Interestingly, sigma can be further enhanced up to 326 S cm-1 by using TAM dopant as a consequence of its favorable diffusion behavior into densely packed crystalline domains. These values are the highest to date for solution-processed molecularly n-doped polymers, demonstrating the effectiveness of the polymer-dopant matching approach carried out in this work.","Impressive n-type thermoelectric performances with a conductivity of 326 S cm-1 and power factor as high as 114 mu Wm-1 K-2 were realized through the approach of polymer-dopant matching, which involved blending two n-type polymers, f-BTI2g-SVSCN and f-BSeI2g-SVSCN, with a julolidine functionalized benzimidazoline n-dopant (JLBI) in addition to the state-of-the-art TAM and N-DMBI dopants. image"]

organic thermoelectrics n-type polymer semiconductors molecular doping electrical conductivity selenophene substitution

SCI ; EI

英语

第一 ; 通讯

Shenzhen Science and Technology Innovation Bureau["JCYJ20220818100617037","KCXST20221021111413031"] ; National Research Foundation of Korea[2019R1A6A1A11044070]

Chemistry

Chemistry, Multidisciplinary

WOS:001302741700001

WILEY-V C H VERLAG GMBH

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Korea Univ, Dept Chem, Anamro 145, Seoul 02841, South Korea

Gamez-Valenzuela, Sergio,Li, Jianfeng,Ma, Suxiang,et al. High-Performance n-Type Organic Thermoelectrics with Exceptional Conductivity by Polymer-Dopant Matching[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2024.

Gamez-Valenzuela, Sergio.,Li, Jianfeng.,Ma, Suxiang.,Jeong, Sang Young.,Woo, Han Young.,...&Guo, Xugang.(2024).High-Performance n-Type Organic Thermoelectrics with Exceptional Conductivity by Polymer-Dopant Matching.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION.

Gamez-Valenzuela, Sergio,et al."High-Performance n-Type Organic Thermoelectrics with Exceptional Conductivity by Polymer-Dopant Matching".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2024).