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Engineering the Thermoelectrical Properties of PEDOT:PSS by alkali Metal Ion Effect

Engineering 2021年第5期7卷 647-654页

作者： Jingjin Dong Jian Liu Xinkai Qiu Ryan Chiechi L.Jan Anton Koster Giuseppe Portale Zernike Institute for Advanced Materials University of GroningenGroningen 9747 AGthe Netherlands Stratingh Institute for Chemistry University of GroningenGroningen 9747 AGthe Netherlands

Engineering the electrical properties of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)holds great potential for various applications such as sensors,thermoelectric(TE)generators,and hole transport layers in solar *** strategies have been applied to achieve optimal electrical properties,including base solution ***,the working mechanism and the exact details of the structural transformations induced by base post-treatments are still *** this work,we present a comparative study on the post-treatment effects of using three common and green alkali base solutions:namely LiOH,NaOH,and *** structural modifications induced in the film by the base post-treatments are studied by techniques including atomic force microscopy,grazing-incidence wide-angle X-ray scattering,ultraviolet–visible–near-infrared spectroscopy,and attenuated total reflectance Fourier-transform infrared ***-induced structural modifications are responsible for an improvement in the TE power factor of the films,which depends on the basic solution *** results are explained on the basis of the different affinity between the alkali cations and the PSS chains,which determines PEDOT *** results presented here shed light on the structural reorganization occurring in PEDOT:PSS when exposed to high-pH solutions and may serve as inspiration to create future pH-/ion-responsive devices for various applications.

关键词： PEDOT:PSS Thermoelectric properties alkali base solutions Post-treatment Structure-property relationship Grazing-incidence wide-angle X-ray scattering

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