期刊
ACS APPLIED ENERGY MATERIALS
卷 3, 期 9, 页码 8667-8675出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c01213
关键词
conjugated polyelectrolyte; organic thermoelectrics; flexible thermoelectrics; conducting polymer; doping
资金
- KAUST Solar Center Competitive Fund (CCF)
- National Research Foundation (NRF) of Korea [2017K2A9A2A12000315, 2019R1A2C2085290]
- King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) [OSR-CRG2018-3737]
- National Research Foundation of Korea [2019R1A2C2085290] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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