Article
Engineering, Electrical & Electronic
Jian Liu, Xiu Yun Daphne Ma, Zhe Wang, Lulu Xu, Fuke Wang, Chaobin He, Xuehong Lu
Summary: This study utilized redox-active metal-organic frameworks to develop a flexible device with both electrochromic and electrofluorochromic functions. The device demonstrated fast switching times and cycling stability, showing potential for applications in displays for portable and wearable consumer products.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Heejung Roh, Shuwen Yue, Hang Hu, Ke Chen, Heather J. Kulik, Aristide Gumyusenge
Summary: Due to its low-power, fast and highly adaptive operability, as well as scalability, electrochemical random-access memory (ECRAM) technology shows great potential for neuromorphic computing based on artificial neural networks. However, there are still challenges in practical implementation, such as high write noise, asymmetric weight updates, and limited dynamic range. In this study, high-performance, single-transistor and neuromorphic devices based on electrochromic polymers (ECPs) are demonstrated, offering a promising approach for the discovery and design of novel polymer materials for organic ECRAMs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Garion E. J. Hicks, Sheng Li, Nimrat K. Obhi, Charles N. Jarrett-Wilkins, Dwight S. Seferos
Summary: π-Conjugated polymers have unique properties that depend on their ordering, with programming techniques such as covalent and solution programming playing a key role in controlling their assembly. Progress in programming at different stages of material development highlights order-dependent features and unique assembly techniques for pi-conjugated polymers.
ADVANCED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Elfin L. Howard, Anna M. Osterholm, D. Eric Shen, L. Prerana Panchumarti, Carlos Pinheiro, John R. Reynolds
Summary: The article discusses the use of conjugated electrochromic polymers to optimize flexible EC displays, providing high-quality color-changing displays within budget constraints.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chenchao Huang, Zishou Hu, Yuan-Qiu-Qiang Yi, Xiaolian Chen, Xinzhou Wu, Wenming Su, Zheng Cui
Summary: In order to manufacture electrochromic devices (ECDs) on a large scale, a research team has developed a UV curable solid-state electrolyte through screen printing technology. The optimized ECDs have a bleaching time of 0.6 seconds and a coloring time of 1.4 seconds, demonstrating excellent stability for applications in smart windows and other areas.
Article
Chemistry, Physical
Shih-Chieh Hsu, Szu-Han Chao, Nian-Jheng Wu, Jen-Hsien Huang, Jia-Lin Kang, Huei Chu Weng, Ting-Yu Liu
Summary: WO3 nanoparticles and MoO3 nanoribbons were prepared using a microwave-assisted hydrothermal method. A stable WO3/MoO3 suspension with a nanoheterojunction structure was obtained after grinding treatment. The ground WO3/MoOx composite film exhibited enhanced electrochromic performance due to its morphology and enhanced electron transfer. A complementary electrochromic device (ECD) using ground WO3/MoOx showed high transmittance modulation, fast switching times, high coloration efficiency, and cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Multidisciplinary
Chang Gu, Ai-Bo Jia, Yu-Mo Zhang, Sean Xiao-An Zhang
Summary: With the rapid development of optoelectronic fields, electrochromic (EC) materials and devices have shown potential for use in emerging wearable and portable electronics and displays, due to their low power consumption, easy viewing, flexibility, and other advantages. However, the challenge of making electrochromics meet the requirements of mature displays has hindered their commercialization. This review comprehensively discusses the progress in emerging EC materials and devices for potential displays, outlines the barriers and potential solutions, and discusses the future of this field.
Article
Chemistry, Multidisciplinary
Zhen Zou, Libei He, Xiangxi Deng, Huangxiang Wang, Ziyun Huang, Qian Xue, Zhihe Qing, Yanli Lei, Ronghua Yang, Juewen Liu
Summary: The study reports the formation of Zn2+-driven RNA self-assembly forming spherical nanoparticles, while preserving the integrity and biological function of RNA, with excellent RNA-loading efficiency, pharmacokinetics, and bioavailability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Indulekha Mukkatt, Anjana Padmaja Mohanachandran, Anjali Nirmala, Dipak Patra, Priyanka A. Sukumaran, Renjith S. Pillai, R. B. Rakhi, Sreejith Shankar, Ayyappanpillai Ajayaghosh
Summary: In this study, three electrode materials based on electrochromic metallopolymers with high volumetric capacitance and energy densities were reported. These materials exhibited excellent electrical conductivity and operational stability, making them suitable for high-performance and compact microenergy storage systems. Their integration with other microelectronic devices for wearable applications is expected.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Indulekha Mukkatt, Anjana Padmaja Mohanachandran, Anjali Nirmala, Dipak Patra, Priyanka A. Sukumaran, Renjith S. Pillai, R. B. Rakhi, Sreejith Shankar, Ayyappanpillai Ajayaghosh
Summary: In this study, three electrode materials based on metallopolymers with high volumetric capacitance and energy densities were reported. These metallopolymers exhibited excellent operational stability under continuous cycling and have potential applications in lightweight and microelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Materials Science, Multidisciplinary
Tuan Van Nguyen, Quyet Van Le, Shengjie Peng, Zhengfei Dai, Sang Hyun Ahn, Soo Young Kim
Summary: Electrochromism is the ability of a material to change its optical properties or color when an external potential is applied. Conventional electrochromic materials based on inorganic materials have drawbacks including single color change, expensive materials, and slow switching speed. To overcome these challenges, conducting polymers (CPs) have emerged as a promising alternative with advantages of multicolor, fast response, low cost, easy processing, and environmental friendliness. This review introduces the current state-of-the-art development of ECDs based on three popular CPs, namely, polyaniline, polypyrrole, and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, with emphasis on their synthetic approaches and electrochromic performance.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Robert M. Pankow, Brendan Kerwin, Yongjoon Cho, Seonghun Jeong, Giacomo Forti, Bryan Musolino, Changduk Yang, Antonio Facchetti, Tobin J. Marks
Summary: A detailed investigation on the effects of functionalizing conjugated polymers with oligo(ethylene glycol) (EG(n)) sidechains on the performance and polymer-electrolyte compatibility of electrochromic devices (ECDs) is reported. The incorporation of EG(n) sidechains must be balanced to achieve good compatibility and efficient ion exchange. The characterization of the polymer film morphology/microstructure reveals that an excessive amount of EG(n) sidechains can suppress ion exchange. The identity of sidechain/electrolyte does not influence the electrolyte penetration depth, but EG(n) sidechain inclusion increases electrolyte cation uptake.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Dae Hun Kim, Tae Whan Kim
Summary: Wearable displays are becoming a core technology for communication between machines and humans, but durability under clothing deformation is still an issue. The self-healable OLEDs reported in this study can recover from physical deformations and have a low operating voltage.
Article
Materials Science, Multidisciplinary
Nerea Casado, Sara Zendegi, Rafael del Olmo, Antonio Dominguez-Alfaro, Maria Forsyth
Summary: The research introduces a composite material based on PEDOT-Cl and an organic ionic plastic crystal that can provide both electronic and ionic conduction as well as redox functionality; the composite exhibits enhanced electronic and ionic conductivities compared to the pure components.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jiashuang Li, Chengcheng Wang, Mingfei Sheng, Yuhua Chen, Bingzhen Li, Qingqing Wu, Shaohai Fu, Liping Zhang
Summary: This study proposes a theory of hydroxyl-acids assisted improvement of electrochromic rate and bistability, and applies it to achieve high-performance solid-state electrochromic devices. The 80% hydroxypropyl acrylate-20% methyl methacrylate copolymer-based electrochromic film outperforms traditional PMMA-based electrochromic films in terms of electrochromic rate and bistability.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Guofa Cai, Jingwei Chen, Jiaqing Xiong, Alice Lee-Sie Eh, Jiangxin Wang, Masayoshi Higuchi, Pooi See Lee
ACS ENERGY LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Manas Kumar Bera, Yoshikazu Ninomiya, Masayoshi Higuchi
Summary: The stepwise introduction of three different transition metals into a metallo-supramolecular polymer has successfully led to the synthesis of a polymer with quad-color electrochromic properties. This synthetic method can be extended to fabricate other MSPs with different compositions, exhibiting a broad optical and electrochemical window.
COMMUNICATIONS CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Dines Chandra Santra, Sanjoy Mondal, Takefumi Yoshida, Yoshikazu Ninomiya, Masayoshi Higuchi
Summary: Metallo-supramolecular polymers (MSPs) composed of a metal ion and ditopic ligand have been developed for electrochromic display applications, with polyRu-LBip showing promising properties of low redox potential, reversible color changes, and high durability. The controlled design of the ligand, tetrakis(N-methylbenzimidazolyl)bipyridine (L-Bip), has significantly improved the optical contrast, response time, and coloration efficiency of the solid-state EC device, indicating great potential for practical applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Kazuko Fujii, Manas Kumar Bera, Dines Chandra Santra, Masayoshi Higuchi
Summary: By forming nanocomposites of polyFe and LIIm, the electrochromic properties can be improved and the memory properties can be enhanced without reducing the contrast in transmittance. The composites exhibit redox waves in the cyclic voltammograms and are estimated to be diffusion controlled.
Article
Chemistry, Physical
Zi-Jie Gong, Yemineni S. L. Narayana, Yen-Chun Lin, Wei-Hsiang Huang, Wei-Nien Su, Yi-Pei Li, Masayoshi Higuchi, Wen-Yueh Yu
Summary: In this study, ruthenium-based metallo-supramolecular polymers (Ru-MSPs) were synthesized and used for heterogeneously catalytic transfer hydrogenation of carbonyl compounds. The polymerization process was controlled by adjusting the ligand/metal ratio and synthesis conditions. The coordinatively unsaturated ruthenium atoms were identified as the active sites for carbonyl reduction, and the Ru-MSPs exhibited enhanced activity and reusability compared to monomeric counterparts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Materials Science, Multidisciplinary
Kazuko Fujii, Dines Chandra Santra, Manas Kumar Bera, Takatsugu Wakahara, Ritsuko Nagahata, Masayoshi Higuchi
Summary: In this study, the electrochromic (EC) properties of metallo-supramolecular polymers (MSPs) were improved by forming nanocomposites with a layered inorganic-imidazoline covalently bonded hybrid (LIIm). The nanocomposites exhibited improved mechanical, optical, and gas barrier properties. The findings suggest that nanocomposite thin films can achieve reversible electrochromic behavior.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jian Zhang, Satya Ranjan Jena, Masayoshi Higuchi
Summary: This study presents an electrical color printing approach using electrochromic metallosupramolecular polymers to achieve rewritable image printing. The printed information has a long retention time, high stability, and can be naturally erased under humid conditions.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Masayoshi Higuchi, Yukio Fujii
Summary: This study successfully developed a designed and flexible electrochromic display device with memory property, which can be used as energy-saving smart windows or digital signages. The display changes were controlled by the etching pattern using mechanical etching technique.
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Masayoshi Higuchi, Yukio Fujii, Yoji Hisamatsu
Summary: Metallo-supramolecular polymers (MSPs) are a novel type of electrochromic (EC) materials that show reversible color changes between orange and pale green. The color changes are caused by metal-to-ligand charge transfer (MLCT) absorption. Insulating films can enhance the display effect on EC devices.
ITE TRANSACTIONS ON MEDIA TECHNOLOGY AND APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Hsin-Che Lu, Li-Yin Hsiao, Sheng-Yuan Kao, Yuki Seino, Dines Chandra Santra, Kuo-Chuan Ho, Masayoshi Higuchi
Summary: Durable electrochromic devices driven at 0.8 V were successfully fabricated using the complementary chromic combination of Fe(II)-based metallo-supramolecular polymer (polyFe) and Prussian blue analogues (PBAs). By utilizing polyFe and NiHCF as the EC pair, a dramatic decrease in driving voltage was achieved, with S-ECD showing better durability in long term stability tests.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Yemineni S. L. Narayana, Sanjoy Mondal, Utpal Rana, Yoshikazu Ninomiya, Dines Chandra Santra, Takefumi Yoshida, Masayoshi Higuchi
Summary: The three-dimensionally hyperbranched Fe(II)-based metallo-supramolecular polymer (polyFe3-D) was synthesized in one step for development of durable electrochromic materials, showing wide absorption, large optical contrast, and high coloration efficiency. The polyFe3-D exhibited reversible redox reactions in cyclic voltammetry and covered a wide visible region with MLCT absorptions, demonstrating high quality and stability.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Manas Kumar Bera, Yoshikazu Ninomiya, Masayoshi Higuchi
Article
Energy & Fuels
Shiuan-Ying Peng, Chun-Hao Su, Masayoshi Higuchi, Kuo-Chuan Ho, Ying-Chih Liao
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2020)
Article
Materials Science, Multidisciplinary
Chanchal Chakraborty, Utpal Rana, Satoshi Moriyama, Masayoshi Higuchi
ACS APPLIED POLYMER MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Takefumi Yoshida, Manas Kumar Bera, Yemineni S. L. Narayana, Sanjoy Mondal, Hitoshi Abe, Masayoshi Higuchi