Abstract: Thermoelectric material is a kind of functional materialthat can directly convert thermal energy into electrical energy. The energy technology based on thermoelectric material is a kind of clean energy technology. Due to the limitation of inorganic thermoelectric materials, namely toxicity, brittleness and high cost, organic thermoelectric materials have aroused widespread concern. Among them, poly(3, 4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has attracted lots of attention, for its high electrical conductivity and low thermal conductivity. However, its thermoelectric properties have not yet met the requirement for real applications. Thus, researchers have applied various methods to modify PEDOT:PSS to improve its thermoelectric performances. This paper mainly introduces the research progress of the modification of PEDOT:PSS with ionic liquids, inorganic fillers, carbon nano-materials and small molecular agents, with an aim to improve its thermoelectric properties. Potential research directions for PEDOT:PSS are also proposed.
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