Journal
CHEMISTRY OF MATERIALS
Volume 31, Issue 17, Pages 6412-6423Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.9b01422
Keywords
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Funding
- National Key R&D Program of China [2017YFA0204701]
- Major State Basic Research Development Program from the MOST [2015CB856505]
- National Natural Science Foundation of China [21420102005, 21790360, 21722201]
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In the past several decades, conducting polymers have achieved remarkable progress and have been widely applied as the active materials for optoelectronics. So far, p-type conducting polymers exhibit high conductivities over 1000 S cm(-1) and thermoelectric performance comparable to that of inorganic materials; however, only a few n-type conducting polymers showed conductivities over 1 S cm(-1) after doping. The low conductivity of n-type conducting polymers is considered as the major barrier for further enhancing their thermoelectric performances. In this perspective, we highlight the scientific and engineering challenges to enhance the conductivity of n-type polymer thermoelectric materials, including n-doping efficiency in n-type polymers, factors influencing charge carrier mobilities after doping, and stability of n-type conducting polymers. Recent development and strategies to address these issues and enhance the conductivity of n-type conjugated polymers are summarized and discussed, providing materials and device engineering guidelines for the future high-performance polymer thermoelectric materials research and development.
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