基于纤维素膜/PEDOT:PSS的电致变色器件及其性能研究

Electrochromic Devices Based on Cellulose Film/PEDOT:PSS and Its Properties

关键词:  电致变色器件  纤维素膜  PEDOT:PSS  透明导电基底

Key Words:electrochromic device  cellulose film  PEDOT： PSS  transparent conductive substrate

摘要:基于纤维素开发了一种环保的高性能电致变色器件（ECD）。通过在纤维素膜表面旋涂聚（3,4-亚乙二氧基噻吩）-聚（苯乙烯磺酸）（PEDOT:PSS），获得纤维素膜/PEDOT:PSS透明导电基底，并与电解质复合构建ECD。随着纤维素膜表面PEDOT:PSS旋涂层数的增加，纤维素膜/PEDOT:PSS透明导电基底的导电率呈增加趋势，透光率呈降低趋势，旋涂3层PEDOT:PSS的纤维素膜/PEDOT:PSS透明导电基底具有77%的透光率和465 Ω/sq的电阻。通过施加3 V的正向电压，制备的ECD的透光率可在10 s内从77%下降至53%，且施加3 V的负向偏压，其透光率可以快速恢复。此外，制备的ECD电致变色能力在循环100次后仍然保持较为稳定的状态。

Abstract:In this study， an environmentally friendly electrochromic device （ECD）was developed based on cellulose.Poly（3，4-ethylenedioxyethiophene）-poly（styrene sulfonic acid） （PEDOT： PSS） was spin-coated on the cellulose film surface to obtain the cellulose film/PEDOT：PSS transparent conductive substrate， which was used to compound with electrolytes to build ECD. As the number of PEDOT：PSS spin coats on the cellulose film surface increased， the conductivity of the cellulose film/PEDOT：PSS transparent conductive substrate showed an increasing trend and the light transmission showed a decreasing trend. The cellulose film/PEDOT：PSS transparent conductive substrate spin-coated with 3-layer had light transmission of 77% and resistance of 465 Ω/sq. By applying a positive voltage of 3 V， the transmittance of prepared ECD decreased from 77% to 53% within 10 s， and the transmittance was quickly recovered by applying a negative voltage. In addition， the electrochromic ability of prepared ECD remained relatively stable after 100 cycles.