Article
Chemistry, Multidisciplinary
Jin-Long Wang, Si-Zhe Sheng, Zhen He, Rui Wang, Zhao Pan, Hao-Yu Zhao, Jian-Wei Liu, Shu-Hong Yu
Summary: Inspired by the concept of galvanic cell, a self-powered flexible electrochromic device has been developed by integrating Ag/W18O49 nanowire film with an Al sheet. This device, requiring no external power source, can generate enough driving force through the combination of Ag nanowire film and Al sheet, showing great potential for future applications in flexible electrochromic smart windows.
Article
Energy & Fuels
George Syrrokostas, Sarantis Tsamoglou, George Leftheriotis
Summary: In this study, the iodide/triiodide redox couple is used in hybrid electrochromic devices, and the effects of applied bias potential and bias time on device performance are investigated. The results show that an appropriate bias potential and time can enhance the contrast ratio, but excessive values lead to increased loss reactions instead of improving optical performance. Long-term performance is influenced by testing procedure, iodine formation, and electrolyte replacement.
Article
Engineering, Chemical
Chung-Wen Kuo, Jui-Cheng Chang, Wun-Cian Huang, Pei-Ying Lee, Tzi-Yi Wu
Summary: The study polymerized a homopolymer containing dTT and four copolymers containing dTT using electrochemical methods, exploring their electrochromic switching properties. Five dual-layer complementary electrochromic devices were assembled based on different polymer combinations, demonstrating multicolor-to-colorless switching capabilities. The findings offer new structural insights for designing large contrast and multicolored electrochromic electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Materials Science, Multidisciplinary
Shiqing Zhao, Xu Gao, Linsen Chen, Wenbin Huang, Yanhua Liu
Summary: This study proposes a tri-layered self-powered electrochromic window with a magnesium anode and an ammonium persulfate cathode to achieve controllable self-coloration and self-bleaching processes. The window exhibits rapid coloring and bleaching times, high optical contrast, long cycling durability, and the ability to illuminate a red LED for 2 hours. A prototype device was also developed for large-area applications.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Zhiyong Wang, Xiangkun Jia, Panpan Zhang, Yannan Liu, Haoyuan Qi, Peng Zhang, Ute Kaiser, Sebastian Reineke, Renhao Dong, Xinliang Feng
Summary: The high-performance ECDs with a fully crystalline viologen-immobilized 2D polymer thin film demonstrate rapid switching speed, high coloration efficiency, and low energy consumption. By vertically integrating the V2DP ECDs with transparent solar cells, transmission-tunable, self-sustainable EC window prototypes were successfully fabricated.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yangbiao Liu, Xuesong Cai, Xiudi Xiao, Jixi Wang, Guizhang Sheng, Gang Xu
Summary: This study successfully prepared PVDF gel electrolytes with high ionic conductivity and excellent mechanical properties through a simple method, providing a new idea for the preparation of WO3 gel ECDs and successfully extending their lifetime.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Polymer Science
Yang Ma, Yanjun Hou, Yuhang Zhang, Lijing Chang, Rui Li, Haijun Niu
Summary: This paper focuses on improving the stability and coloring efficiency of triphenylamine polymers. Different diamines and 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylic acid were synthesized separately, and the electrochromic functions of the polymer films were studied. The results showed good stability and reasonable optical contrast for the polymer films.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
Chung-Wen Kuo, Shu-Chien Fan, Jui-Cheng Chang, Jeng-Kuei Chang, Li-Ting Lee, Pei-Ying Lee, Tzi-Yi Wu
Summary: A carbazole derivative was synthesized, and various polymer films were electrochemically coated on ITO/glass substrates. The electrochromic characterization showed that the films exhibited different colors at different voltages. The dual-layer electrochromic devices demonstrated multicolored electrochromism, high transmittance change, high coloration efficiency, and fast switching time, suggesting potential applications in organic electrochromic devices.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Polymer Science
Andrei Chernyshev, Udit Acharya, Jiri Pfleger, Olga Trhlikova, Jiri Zednik, Jiri Vohlidal
Summary: By assembling four new bis(tpy) unimers with different linkers with Fe2+ ions to metallo-supramolecular polymers, the Fe-MSP films showed excellent optical contrast and coloration efficiency, with Fe-Tt exhibiting the highest performance and potential application in electrochromic devices.
Article
Nanoscience & Nanotechnology
Haiyi Xie, Zitao Wang, Mahmoud A. Khalifa, Yajie Ke, Jianming Zheng, Chunye Xu
Summary: Compared to organic electrolytes, aqueous electrolytes are non-combustible and eco-friendly, making them more suitable for daily use in smart windows. However, their use in conventional electrochromic devices is limited by the narrow electrochemical window of water, resulting in irreversible performance losses. This study proposes a synergistic scheme using a redox couple-catalytic counter electrode strategy with protons as guest ions to reduce the working voltage range of the device. The proton-based electrochromic device exhibits higher coloration efficiency, broader color modulation capability, and better stability compared to other guest ions.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Chung-Wen Kuo, Jui-Cheng Chang, Jeng-Kuei Chang, Sheng-Wei Huang, Pei-Ying Lee, Tzi-Yi Wu
Summary: In this study, five carbazole-containing polymeric membranes were examined, with P(DTC-co-BTP2) showing high Delta T at 855 nm, and P(DTC-co-TF2) displaying multiple colors in different reduced and oxidized states. Assembling polymer-based organic electrochromic devices allowed for high transmittance change and rapid switching time, demonstrating satisfactory optical memory and high coloration efficiency.
Article
Materials Science, Multidisciplinary
Feifei Zhao, Jingmei Zhao, Yun Zhang, Xu Wang, Wenshou Wang
Summary: A flexible self-powered quasi-solid-state ECD with a simplified bilayer film structure has been developed, showing high color switching speed, reversibility, and adjustable coloring rate; with the ability to restore color switching properties after repeated cycling, significantly extending its lifetime; practical applications in optical information encryption and decryption have been demonstrated.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Green & Sustainable Science & Technology
Zexing Liu, Jiayu Yang, George Leftheriotis, Hui Huang, Yang Xia, Yongping Gan, Wenkui Zhang, Jun Zhang
Summary: Energy consumption in buildings, especially for heating, cooling, and lighting, is a crucial sector globally. To reduce energy consumption, smart windows that can change their optical and thermal properties have been considered as a promising technology. In this study, a multifunctional smart window was designed using a complementary structure of tungsten oxide and Prussian blue thin films, powered by an integrated dye-sensitized solar cell. The window exhibited adjustable optical modulation and temperature regulation, with energy-storage ability and excellent durability, presenting potential applications in modern buildings.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Jiseon Kim, Dongwon Shin, Minhee Son, Caroline Sunyong Lee
Summary: A quartet dual-band electrochromic device (ECD) with an AgNO3+TBABr+LiClO4 (ATL)-based electrolyte was developed to selectively control transmittance for energy-efficient smart windows. The device demonstrated four modes of trans-parent, warm, cool, and all-block through independent redox reactions of lithium and silver ions. The dual-band ECD showed high optical contrasts and long-term durability, suggesting a new strategy for designing dual-band smart windows to reduce energy consumption.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Chung-Wen Kuo, Jui-Cheng Chang, Yu-Xuan Lin, Pei-Ying Lee, Tzi-Yi Wu, Tsung-Han Ho
Summary: In this study, electrochromic devices were prepared using polymers containing DCB and ED derivatives, and their performances were investigated. The P(2DCB-co-ED)/PEDOT-PSS flexible device showed high Delta T and good stability, while the P(DCB-co-EDm)/PEDOT-PSS device exhibited high Delta T and a short response time.
