Article
Energy & Fuels
Guoqiang Xing, Guoqiang Kuang, Yijie Tao, Yi Wang, Yue Kang, Yafei Guo, Shiguo Zhang
Summary: In this study, a novel composite electrolyte was constructed by adding glass fibers to enhance its mechanical strength. The electrochromic device fabricated with the composite electrolyte showed excellent performance and stability. Moreover, a flexible electrochromic device was successfully assembled, demonstrating remarkable electrochromic behaviors and flexibility.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
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
Energy & Fuels
Hsin-Fu Yu, Chun -Ting Li, Kuo-Chuan Ho
Summary: A newly designed polymeric ionic liquid, PFI-BF4, was synthesized for the use in electrochromic devices. It exhibited stable electrospun membranes with enhanced electrochemical stability. The PFI-BF4_1.5 ECD showed high transmittance change, effective coloration efficiency, and retained its initial performance after a large number of switching cycles.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Ceramics
Zhang Xiaoyu, Liu Yongsheng, Li Ran, Li Yaogang, Zhang Qinghong, Hou Chengyi, Li Kerui, Wang Hongzhi
Summary: The electrochemical and electrochromic behavior of triphenylene-based MOFs Cu-3(HHTP)(2) films were studied in traditional propylene carbonate (PC)-based electrolyte and ionic liquid-based electrolytes, showing better performance in the ionic liquid [EMIm] BF4 electrolyte.
JOURNAL OF INORGANIC MATERIALS
(2022)
Article
Engineering, Manufacturing
Minji Lee, Minhee Son, Doo-man Chun, Caroline Sunyong Lee
Summary: The composition of the polymer matrix significantly influences the transmittance change and stability of Electrochromic devices (ECDs). ECDs with solid polymer matrix electrolyte UV-30 showed good cyclability and improved electrochromic performance, with maintained Delta T of 35% over 200 cycles and low charge transfer resistance at the interface.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Kruger, Richard Pereira, Wladimir H. Flores, Andre Gundel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: The study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films, demonstrating that ZnO doping improved the cyclic stability and reversibility of the films and resulted in a mixture of crystalline phases.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Leandro L. Peres, Camila M. Cholant, Rafaela M. J. Lemos, Marco P. Rodrigues, Luana U. Krueger, Richard Pereira, Wladimir H. Flores, Andre Guendel, Douglas L. da Silva, Agnieszka Pawlicka, Cesar O. Avellaneda
Summary: This study used the peroxovanadate sol-gel method to produce ZnO-doped V2O5 thin films and investigated the effect of doping on the electrochromic and structural characteristics of the films. The results showed that ZnO doping improved the cyclic stability and reversibility of the films, making them promising candidates for electrochromic device applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Xiao-Jing Lv, Li-Bin Xu, Liang Qian, Yuan-Yuan Yang, Zhi-Yi Xu, Jin Li, Cheng Zhang
Summary: An imidazolium-based ionic liquid modified triphenylamine derivative was synthesized and utilized to prepare a conjugated copolymer P(EDOT:TPAC(6)IL-BF4) with improved redox properties and UV-Vis absorption characteristics. The copolymer exhibited excellent electrochromic behavior even in the absence of supporting electrolyte, indicating its potential for high-performance electrochromic materials.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jin-Long Wang, Jian-Wei Liu, Si-Zhe Sheng, Zhen He, Jie Gao, Shu-Hong Yu
Summary: By coassembling W18O49 and V2O5 nanowires, a novel multicolor electrochromic device is demonstrated, which shows dynamic color change upon application of different electrochemical biases. The transparency and color of the device can be easily controlled by manipulating the layers and ratios of coassembled nanowires, allowing for the fabrication of different patterns with corresponding masks. This solid electrochromic device assembled from nanowires has significant potentials in smart windows and multicolor electrochromic displays.
Article
Nanoscience & Nanotechnology
Sayantan Sarkar, Tanushree Ghosh, Argha Chakrobarty, Jagannath Majhi, Probal Nag, Anasuya Bandyopadhyay, Sivaranjana Reddy Vennapusa, Rajesh Kumar, Suman Mukhopadhyay
Summary: Here, a redox-active multifunctional ionic porous organic polymer iPOP-Bpy with exchangeable Br- ions, incorporating viologen as a redox-active building block, is designed and synthesized. The material exhibits excellent iodine uptake capacity in vapor phase (540 wt %) as well as in organic (1009.77 mg g(-1)) and aqueous phases (3921.47 mg g(-1)) with very fast adsorption kinetics. It also functions as a solid-state NH3 vapor sensor, showing rapid color switching in the presence of NH3 vapor. Moreover, it is used as a p-type complementary electrochromic electrode and shows promising performance for fabricating power-efficient solid-state electrochromic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Environmental
Pramod V. Rathod, John Marc C. Puguan, Hern Kim
Summary: In this study, a modified asymmetric viologen was incorporated into a phase-changing monomer via quaternization to synthesize a dual-responsive material. Unlike most chromic materials, which respond to only one stimulus, this material exhibited both electrochromic and thermochromic responses. It switched from clean to opaque when heated from 25 to 32 degrees C, achieving high optical contrast in the visible range. Additionally, it showed a transparent-to-cloudy blue transition and high optical contrast when stimulated by both heat and voltage, making it ideal for privacy-enhancing building facades.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Wei Church Poh, Alice Lee-Sie Eh, Wenting Wu, Xiaoyu Guo, Pooi See Lee
Summary: Formation of ionogels through in situ polymerization improves electrolyte processability. Two in situ polymerized ionogels are developed, which can be rapidly photocured and exhibit excellent physicochemical stability. The electrochromic devices assembled using these ionogels show high color contrast, fast response time, and excellent cycling endurance. Additionally, these devices can be operated over a wide temperature range. The technology also enables the realization of flexible and curved electrochromic devices, highlighting their potential use in futuristic wearables.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Applied
Shouli Ming, Hui Zhang, Shijie Zhen, Yingxue Zhang, Baoyang Lu, Jinsheng Zhao, Guangming Nie, Jingkun Xu
Summary: Fluorine atom substituted conjugated polymers exhibit enhanced photoelectric performance but hinder ion transport due to molecular aggregation. In this study, two fluorine substituted hybrid conjugated polymers were prepared, and their differences in molecular structure and properties were investigated.
Article
Engineering, Environmental
Li-Yin Hsiao, Fang-Yu Kuo, Chien-Hsin Wu, Ying-Chi Huang, Yen-Chun Wang, Ru-Jong Jeng, Kuo-Chuan Ho
Summary: A novel N-methylphenothiazine based ionic liquid (NMP-IL) was synthesized for achieving low-driving voltage electrochromic devices (ECDs) with thermal durability. By chemically bonding with the ionic liquid, NMP-IL displayed large optical contrast and high thermal stability, providing higher ionic conductivity compared to NMP and reducing the driving voltage of ECDs. ECDs based on NMP-IL exhibited a large transmittance change, desirable coloration efficiency, and impressive long-term stabilities, showing the potential of NMP-IL as a new anodically coloring material for energy-saving ECD applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Shengwei Tang, Rongzong Zheng, Junlong Niu, Zhongquan Wan, Chunyang Jia, Xiaolong Weng, Longjiang Deng
Summary: The viologen-based gel is a typical electrochromic material, but it faces two main problems in its application in electrochromic devices. To overcome these limitations, a self-healing all-in-one electrochromic gel was synthesized by incorporating benzyl boronic acid viologen (BBV) with an electrolyte containing polyvinyl alcohol (PVA). The gel showed excellent mechanical properties and self-healing performance, and the electrochromic device prepared using this gel exhibited good response time, optical contrast, and cycling stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Sudharm Rathore, Guifang Han, Anshuman Kumar, Wei Lin Leong, Aparna Singh
Summary: This study reports the elastic modulus of 3D perovskite MaPbI(3), pure 2D perovskite (5-AVA)(2)PbI4, and 2D-3D mixed perovskites thin films through nanoindentation technique, showing that the 2D perovskite has a lower modulus than the 3D perovskite. Density functional theory calculations confirm the experimental results, indicating that 2D perovskites are more stable against moisture.
Article
Energy & Fuels
Mathilde Fievez, Prem Jyoti Singh Rana, Teck Ming Koh, Matthieu Manceau, Jia Haur Lew, Nur Fadilah Jamaludin, Biplab Ghosh, Annalisa Bruno, Stephane Cros, Solenn Berson, Subodh G. Mhaisalkar, Wei Lin Leong
Summary: This study demonstrates a method of slot-die coating combined with gas quenching and substrate heating, which can produce compact, homogenous and reproducible perovskite films on large-area substrates. Perovskite solar cells with high power conversion efficiency were successfully fabricated using this technique.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Abhijith Surendran, Shuai Chen, Jia Haur Lew, Xihu Wu, Teck Ming Koh, Wei Lin Leong
Summary: The research demonstrates a self-powered ion-sensing organic electrochemical transistor driven by carbon electrode-based perovskite solar cells, which exhibits highly stable device operation independent of incident light intensity. The integrated system shows good sodium ion sensitivity, highlighting its potential for use in portable, wearable, and self-powered sensing devices.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Multidisciplinary
Xihu Wu, Meera Stephen, Tania C. Hidalgo, Teddy Salim, Jokubas Surgailis, Abhijith Surendran, Xiaoqian Su, Ting Li, Sahika Inal, Wei Lin Leong
Summary: Research focuses on improving the conductivity of PEDOT:PSS films in OECTs to achieve high transconductance. By using ionic liquids as additives, an optimal morphology is realized, enhancing ion accessibility, lowering gate bias, and enabling high transconductance, fast transient response, all at a lower gate bias window.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Bening Tirta Muhammad, Shaoni Kar, Meera Stephen, Wei Lin Leong
Summary: Metal halide perovskite solar cells have shown high efficiency in indoor photovoltaic applications, sparking great interest and potential in powering low power IoT sensors in smart buildings. The development of defect reduction and interfacial engineering strategies in PSCs has contributed to their success in low light intensity indoor settings.
MATERIALS TODAY ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Xiaoqian Su, Xihu Wu, Shuai Chen, Anu Maashaa Nedumaran, Meera Stephen, Kunqi Hou, Bertrand Czarny, Wei Lin Leong
Summary: This study reports a highly stretchable and autonomic self-healable conducting film that exhibits outstanding stretchability, high electrical conductivity, and the ability to repair mechanical and electrical breakdowns. The film is utilized in a tactile sensor and an organic electrochemical transistor array, improving the practicality and shelf life of wearable electronics.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Teck Lip Dexter Tam, Akshay Moudgil, Wei Jie Teh, Zicong Marvin Wong, Albertus Denny Handoko, Sheau Wei Chien, Shuo-Wang Yang, Boon Siang Yeo, Wei Lin Leong, Jianwei Xu
Summary: Conjugated polymers offer good performance for thermoelectrics at near ambient temperatures. Current research focuses on improving the power factor (PF) through enhancing charge mobility. The relationship between the structure and Seebeck coefficient is not well understood. This study investigates the relationship using highly identical pro-quinoid polymers and demonstrates that increasing polaron delocalization enhances conductivity and Seebeck coefficient simultaneously.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Multidisciplinary
Shuai Chen, Kunqi Hou, Ting Li, Xihu Wu, Zhe Wang, Lei Wei, Wei Lin Leong
Summary: This article reports a highly stable and comfortable fibrous electrolyte with potential applications in on-skin electronics.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Xihu Wu, Teck Lip Dexter Tam, Shuai Chen, Teddy Salim, Xiaoming Zhao, Zhongliang Zhou, Ming Lin, Jianwei Xu, Yueh-Lin Loo, Wei Lin Leong
Summary: This study reports the first all-polymer BHJ-based OECTs, demonstrating the critical role of polymer nanostructures in ion transport and device performance. This work is significant for the design of new materials for OECTs and the development of organic heterojunctions for high-performing logic circuits.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Meera Stephen, Ali Nawaz, Sang Yeon Lee, Prashant Sonar, Wei Lin Leong
Summary: Electronic devices that can disappear without harmful by-products offer a wide range of opportunities in various fields and address the global issue of electronic waste. Biodegradable materials play a significant role in the development of organic transistors, allowing the fabrication of eco-friendly and sustainable devices. This article comprehensively discusses the use of biodegradable materials in different types of organic transistors and highlights their unique properties.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Engineering, Electrical & Electronic
Akshay Moudgil, Wei Lin Leong
Summary: This article summarizes the importance of transistors in biochemical sensing and the critical sensing capabilities of various transistor classes in biochemical detection. It also discusses recent advancements in the field of transistors for bioanalyte sensing and compares organic and inorganic active material-based transistors for specific target biodetection and healthcare applications.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Akshay Moudgil, Kunqi Hou, Ting Li, Wei Lin Leong
Summary: Wearable bioelectronic sensors have been widely used in healthcare technologies as an alternative to traditional clinical testing and health monitoring. However, there are various challenges that need to be overcome for off-site and point-of-care commercial applications, such as sensitivity, selectivity, sample procurement technique, and accurate real-time sensing. This study presents a flexible solid-state organic electrochemical transistor for multi-ions sensing, providing high selectivity, fast response, and superior sensitivity. The integrated ExG-SSOECT device platform shows improved performance compared to other wearable sensors and has the potential to be suitable for wearable bioelectronics.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Meera Stephen, Xihu Wu, Ting Li, Teddy Salim, Kunqi Hou, Shuai Chen, Wei Lin Leong
Summary: Organic electrochemical transistors (OECTs) based on PEDOT:PSS are versatile platforms for various applications. Modulation of the microstructure of the PEDOT:PSS film allows for tuning the operation and device characteristics of the resulting OECT.
MATERIALS HORIZONS
(2022)
Proceedings Paper
Energy & Fuels
Mathilde Fievez, Emmanuelle Fayard, Carine Roux, Wei Lin Leong, Matthieu Manceau, Stephane Cros, Solenn Berson
Summary: Although significant progress has been made in efficiency for perovskite-based solar cells, upscaling the process remains a major obstacle for commercial applications. A scalable method for processing perovskite layers in air was developed, resulting in pinholes-free films with high efficiency in single junction devices reaching >18% conversion efficiency on 10 cm(2) devices.
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2021)
Article
Materials Science, Multidisciplinary
Bening Tirta Muhammad, Teddy Salim, Annalisa Bruno, Andrew C. Grimsdale, Wei Lin Leong
Summary: Utilizing sulfate treatment can reduce chemical degradation at the perovskite/ETL interface on metal oxide surfaces, leading to improved operational stability in PSCs. Devices treated with sulfate exhibited better initial efficiency retention, no impact on morphology, and enhanced stability in thermal aging experiments.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Jinfei Dai, Chenjing Zhao, Jie Xu, Hossein Roshan, Hua Dong, Francesco Di Stasio, Fang Yuan, Bo Jiao, Zhaoxin Wu
Summary: In this study, the performance of perovskite nanocrystal light emitting diodes (PNC-LEDs) was enhanced through rational device structure design and the application of high-performance perovskite nanocrystal emitting layers.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Jia-Hua Yeh, Suhendro Purbo Prakoso, Leon Lukhas Santoso, Shi-Ju Chen, Bryan Chiang, Ju-Chieh Cheng, Ru-Ning Zhang, Yu-Cheng Chiu
Summary: This study demonstrates the application of a renewable material called dextrin-SMS in the production of electret filters and transistor memory. Dextrin-SMS material can maintain prolonged electrostatic charges and has a relatively wide memory window, making it suitable for the production of biodegradable face masks and green electronics.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Ahmad Telfah, Qais M. Al-Bataineh, Ahmad A. Ahmad, Rund Abu-Zurayk, Carlos J. Tavares, Johannes Etzkorn, Farzad Foadian
Summary: Polyacrylic acid complexed with polyaniline (PAA/PANI) composite materials have the potential to form organic mixed ion-electron conductive (OMIEC) films, which can be used in optoelectronic and energy storage applications. The composite films are formed through an acid-base reaction, resulting in strong electrostatic interactions and intermolecular hydrogen bonds between PANI and PAA. The separation of PANI-rich domains from PAA-rich matrix in the composite films is observed. The electrical conductivity of the composite films is higher when the content of PANI is 33 wt%, due to the high ionic-electronic coupling at the interface between phase-separated regions.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Min-Chih Hou, Dian Luo, Yu-Ting Huang, Shun-Wei Liu, Chin-Wei Lu, Chih-Hao Chang, Hai-Ching Su
Summary: Light-emitting electrochemical cells (LECs) have great potential for novel emission applications, but their relatively low device efficiency hinders their competitiveness with other emission technologies. A study finds that increasing the concentration of small TiO2 nano-particles in the diffuser film can enhance light extraction and improve the device efficiency of LECs.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Qiaoli Niu, Yao Xu, Jun Yang, Wei Hua, Baoxiang Chai, Zequan Zhang, Yuhui Ma, Wenjin Zeng, Ana Flavia Nogueira, Ruidong Xia
Summary: By introducing CPB as a defect passivation agent in the perovskite precursor solution, the optoelectronic properties of perovskite films can be significantly improved and non-radiative carrier recombination can be effectively suppressed. CPB-modified perovskite solar cells exhibit lower trap-state density and stronger carrier migration capability, leading to enhanced power conversion efficiency and stability.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Hulya Ozturk Dogan, Fatma Yildirim, Zeynep Orhan, Ali Ben Ahmed, Mostefa Benhaliliba, Sakir Aydogan
Summary: In this study, efficient self-powered visible and UV photodetectors based on hybrid organic-inorganic materials were demonstrated. The photodetectors showed excellent UV detecting capability and good photoresponsivity.
ORGANIC ELECTRONICS
(2024)