Characterization of Electrochromic Properties of Polyaniline Thin Films Electropolymerized in H₂SO₄ Solution

作     者：Dang Hai Ninh Tran Thi Thao Pham Duy Long Nguyen Nang Dinh Dang Hai Ninh;Tran Thi Thao;Pham Duy Long;Nguyen Nang Dinh

作者机构：University of Engineering and Technology Vietnam National University Hanoi Hanoi Vietnam Institute of Materials Science Vietnamese Academy of Science and Technology Hanoi Vietnam 

出 版 物：《Open Journal of Organic Polymer Materials》 (有机高分子材料期刊（英文）)

年 卷 期：2016年第6卷第1期

页      面：30-37页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Polyaniline Thin Films UV-Vis Absorption Electrochromic Property 

摘      要：Polyaniline (PANI) onto indium-doped tin-oxide (ITO)-coated glass samples were prepared by electroopolymerization in 0.5 M H2SO4 solution. Structure and morphology characterization of the PANI films demonstrated that the films were grown onto ITO substrates in the form of polycrystalline microbelts separated by micropores. By analysing the UV-Vis absorption spectra of the PANI films, the energy bandgap was found to be approximately 2.75 eV. The PANI/ITO films exhibited a good reversible electrochromic display (ECD) performance when cycled in 0.1 M LiClO4 + pro-pylene carbonate. The response time of the ECD coloration was found to be as small as 15 s and the coloration efficiency was found to be 8.85 cm2 C-1. After 100 cycles of the ECD performance, the cyclic voltammetry curve of the working electrode maintained unchanged. This demonstrates that the electropolymerized PANI films can be served as a good candidate for ECD applications, taking advantage of their excellent properties in terms of chemical stability.