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摘要
Poly(3,4-ethylenedioxythiophene)-tosylate-polyethylene glycol-polypropylene glycol-polyethylene glycol (PEDOT-Tos-PPP) films were prepared via a vapor phase polymerization (VPP) method. The films possess good electrical conductivity (1550 S cm(-1)), low Seebeck coefficient (14.9 mu V K-1) and thermal conductivity (0.501Wm-1 K-1), and ZT similar to 0.02 at room temperature (RT, 295 K). Then, the films were treated with NaBH4/DMSO solutions of different NaBH4 concentrations to adjust the redox level. After the NaBH4/DMSO treatment (dedoping), the electrical conductivity of the films continuously decreased from 1550 to 5.7 S cm(-1), whereas the Seebeck coefficient steeply increased from 14.9 to 143.5 mu V K-1. A maximum power factor of 98.1 mu Wm(-1) K-2 has been achieved at an optimum redox level. In addition, the thermal conductivity of the PEDOT-Tos-PPP films decrease from 0.501 to 0.451Wm(-1) K-1 after treated with 0.04% NaBH4/DMSO solution. A maximum ZT value of 0.064 has been achieved at RT. The electrical conductivity and thermal conductivity (Seebeck coefficient) of the untreated and 0.04% NaBH4/DMSO treated PEDOT-Tos-PPP films decrease (increases) with increasing temperature from 295 to 385 K. And the power factor of the films monotonically increases with temperature. The ZT at 385 K of the 0.04% NaBH4/DMSO treated film is 0.155.
- 出版日期2015-2
- 单位同济大学
