A Highly Conductive Conjugated Polyelectrolyte for Flexible Organic Thermoelectrics
- Authors
- Kee, Seyoung; Haque, Md Azimul; Lee, Yeran; Thanh Luan Nguyen; Villalva, Diego Rosas; Troughton, Joel; Emwas, Abdul-Hamid; Alshareef, Husam N.; Woo, Han Young; Baran, Derya
- Issue Date
- 28-9월-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- conjugated polyelectrolyte; organic thermoelectrics; flexible thermoelectrics; conducting polymer; doping
- Citation
- ACS APPLIED ENERGY MATERIALS, v.3, no.9, pp.8667 - 8675
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED ENERGY MATERIALS
- Volume
- 3
- Number
- 9
- Start Page
- 8667
- End Page
- 8675
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/53101
- DOI
- 10.1021/acsaem.0c01213
- ISSN
- 2574-0962
- Abstract
- Organic thermoelectrics have attracted considerable attention owing to their remarkable advantages, including roomtemperature power generation, skin-attachable/wearable applications with biocompatibility, and solution-based high-throughput fabrication. Self-doped conjugated polyelectrolytes (CPEs) constitute a promising class of conductive organic materials that are considered potential candidates for organic thermoelectrics. However, the low power factor of CPEs derived from their low electrical conductivity (sigma) has been a major drawback in CPE-based thermoelectrics. Herein, we report a strategy for enhancing the thermoelectric performance of CPEs through post-treatment using aq H2SO4 solution. The post-treatment increases sigma by 2 orders of magnitude, originating from H2SO4-induced doping accompanying a significant increase in charge-carrier concentration. Consequently, a power factor of 3.0 mu W m(-1) K-2 is achieved at room temperature. Furthermore, using this highly conductive H2SO4-doped CPE, we developed flexible thermoelectric generators that allow durable power generation under repetitive mechanical bending stresses. Our findings provide insight into developing high-performance and versatile CPEs for the next-generation organic thermoelectrics.
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