Xin Binbin, Wang Lei, Le Febvrier Arnaud, Elsukova Anna, Paul Biplab, Solin Niclas, Eklund Per
Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden.
Electronic and Photonic Materials Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden.
ACS Omega. 2022 Jun 28;7(27):23988-23994. doi: 10.1021/acsomega.2c02875. eCollection 2022 Jul 12.
Nanoporous CaCoO exhibits high thermoelectric properties and low thermal conductivity and can be made mechanically flexible by nanostructural design. To improve the mechanical flexibility with retained thermoelectric properties near room temperature, however, it is desirable to incorporate an organic filler in this nanoporous inorganic matrix material. Here, double-layer nanoporous CaCoO/PEDOT:PSS thin films were synthesized by spin-coating PEDOT:PSS into the nanopores. The obtained hybrid films exhibit high Seebeck coefficient (∼+130 μV/K) and thermoelectric power factor (0.75 μW cm K) at room temperature with no deterioration in electrical properties after cyclic bending tests (98% preservation of electrical conductivity after 1000 cycles bending to a bending radius of 3 mm). Compared with the nanoporous CaCoO thin film, the mechanical flexibility of the hybrid film can be effectively improved after hybrid with PEDOT:PSS with only a slight decrease of the thermoelectric properties.
纳米多孔CaCoO具有高热电性能和低导热率，并且可以通过纳米结构设计使其具有机械柔韧性。然而，为了在室温附近保持热电性能的同时提高机械柔韧性，在这种纳米多孔无机基体材料中掺入有机填料是很有必要的。在此，通过将PEDOT:PSS旋涂到纳米孔中合成了双层纳米多孔CaCoO/PEDOT:PSS薄膜。所获得的混合薄膜在室温下表现出高塞贝克系数（约 +130 μV/K）和热电功率因子（0.75 μW cm K），并且在循环弯曲测试后电性能没有恶化（弯曲半径为3 mm弯曲1000次后电导率保留98%）。与纳米多孔CaCoO薄膜相比，与PEDOT:PSS混合后，混合薄膜的机械柔韧性可以有效提高，而热电性能仅略有下降。
