期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 50, 页码 44033-44040出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b15332
关键词
PEDOT:PSS; gelation; thermoelectric fiber; energy harvesting; fiber device
资金
- National Natural Science Foundation of China [51762018, 51572117, 51863009]
- Innovation Driven 5511 Project of Jiangxi Province [20165BCB18016]
- Natural Science Foundation of Jiangxi Province [20181ACB20010]
The requirement of a portable electron is functioning as a driving force for a wearable energy instrument. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), as one of the most promising organic electron materials, has been widely studied in energy conversion devices. However, the efforts for PEDOT:PSS fibers are insufficient to boost the development of wearable thermoelectric energy harvesting. Here, a highly conductive p-type PEDOT:PSS fiber was produced by gelation process, which was 3 orders of magnitude higher than that of previous hydrogel fibers. Surprisingly, a post-treatment with organic solvents such as ethylene glycol and dimethyl sulfoxide tripled their electrical conductivity with an only 5% decreased Seebeck coefficient, consequently leading to an optimized thermoelectric power factor. Furthermore, we assembled a p-n-type thermoelectric device connecting five pairs of p-type PEDOT:PSS fibers and n-type carbon nanotube fibers. This fiber-based device displayed an acceptable output voltage of 20.7 mV and a power density of 481.2 mu W.cm(-2) with a temperature difference of similar to 60 K, which might pave the way for the development of organic thermoelectric fibers for wearable energy harvesting.
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