Realizing high thermoelectric performance flexible free-standing PEDOT:PSS/Bi_(0.5)Sb_(1.5)Te_(3)composite films for power generation  

作　　者：Li Sun Dong-Wei Ao Junphil Hwang Qin Liu En-Si Cao Bing Sun 

机构地区：[1]School of Physics and Electronic Information,Weifang University,Weifang 261061,China [2]School of Machinery and Automation,Weifang University,Weifang 261061,China [3]School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China [4]Korea Construction Equipment Technology Institute,Gunsan-si 54004,Jeollabuk-do,Korea

出　　处：《Rare Metals》2024年第11期5985-5993,共9页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.12204355 and 52272210);the Natural Science Foundations of Shandong Province(Nos.ZR2023ME001 and ZR2022QA018);China Postdoctoral Science Foundation(No.2023M732609);the Doctoral Research Initiation Fund of Weifang University(Nos.2023BS01 and 2023BS06)。

摘　　要：Flexible thermoelectrics provide a distinct solution for developing sustainable and portable power supplies.Inorganic/organic material compositing is an effective strategy to induce a significant enhancement of thermoelectric(TE)performance.However,the poor electrical performance of inorganic/organic material is attributed to the poor carrier transport between organic/inorganic interfaces induced by the low contribution of composited inorganic materials.Herein,we prepared a high room temperature figure-of-merit(ZT)value of~0.19 and high bending resistance(surviving 1200 bending cycles at the bending radius of 16.5 mm)of p-type poly(3,4-ethylenedioxy thiophene):poly(4-styrenesulfonate)(PEDOT:PSS)/Bi_(0.5)Sb_(1.5)Te_(3)free-standing composite film via a facile vacuum-as sis ted filtration approach.Compositing Bi_(0.5)Sb_(1.5)Te_(3)nano-spherical particles into PEDOT:PSS results in the optimized interfacial contact and carrier concentration,leading to a high Seebeck coefficient of~43.79μV·K^(-1).Accordingly,a high-power factor of~1.52μW·cm^(-1)·K^(-2)is achieved in the PEDOT:PSS/Bi_(0.5)Sb_(1.5)Te_(3)composite film at room temperature.In addition,the PEDOT:PSS/Bi_(0.5)Sb_(1.5)Te_(3)interfaces with phase boundaries,nanograins and point defects could further decrease the thermal conductivity to~0.20 W·m^(-1)K^(-1),leading to a high ZT value.Furthermore,a 6-leg freestanding film device was assembled,which provided an output power of 44.94 nW.This study demonstrates that free-standing organic/inorganic composite films are effective power sources for wearable electronic products.

关 键 词：THERMOELECTRIC PEDOT:PSS/Bi_(0.5)Sb_(1.5)Te_(3) Flexible films Device 

分 类 号：TB383.2[一般工业技术—材料科学与工程]