Article
Chemistry, Applied
Keon-Woo Kim, Jae Kyeong Lee, Xiaowu Tang, Yujeong Lee, Jihyeon Yeo, Hong Chul Moon, Seung Woo Lee, Se Hyun Kim
Summary: EC materials, particularly EC polymers, show promise for applications in smart windows and information displays due to their color tuning capabilities. A new EC polymer with redox-active triphenylamine and viologen was synthesized and utilized in ECDs, demonstrating multiple colors based on applied voltage. Additionally, voltage-tunable multicolor EC displays were successfully created using EFAD printing.
Article
Energy & Fuels
Roberto Giannuzzi, Carmela Tania Prontera, Vitantonio Primiceri, Agostina Lina Capodilupo, Marco Pugliese, Fabrizio Mariano, Antonio Maggiore, Giuseppe Gigli, Vincenzo Maiorano
Summary: Hybrid electrochromic devices combine the advantages of solid-state and liquid-based devices to optimize their performances. In this study, a new redox shuttle, thiolate/disulphide, was combined with a transparent thermally curable vinyl-acetate polymer to create a solid-state electrochromic (EC) device. Compared to a device based on I-/I3-, the EC device based on T-/T2 showed higher transparency and coloration efficiency in the visible region of the solar spectrum. Additionally, it displayed a slower self-bleaching process and only lost 30% of its coloration after 1 hour at open circuit, making it highly suitable for smart windows applications that require energy-saving.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Multidisciplinary
Bin Deng, Yanan Zhu, Xiaowei Wang, Jinlin Zhu, Manyu Liu, Mingqiang Liu, Yaowu He, Caizhen Zhu, Chaohong Zhang, Hong Meng
Summary: This project aims to design a smart window that responds to both electricity and heat, achieving energy efficiency, privacy preservation, and enhanced decorative attributes. By using a novel electrochromic material design and optimizing electrochromic devices, high-performance ECDs with fast color-switching speed and significant transmittance modulation are obtained. Additionally, a thermochromic gel electrolyte is created to provide excellent thermal insulation and further enhance the window's performance. Overall, this work showcases a prospective design pathway for the development of next-generation ultrafast-switching, and energy-efficient intelligent windows.
ADVANCED MATERIALS
(2023)
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
Chemistry, Applied
Yuewei Zhang, Xuchao Jin, Weiran Zhang, Chang Gu, Xuesong Liu, Yu-Mo Zhang
Summary: A bistable electrochromic device based on poly(viologen)s is demonstrated to have good overall performance, including long bistability, low switch-on voltage, and high reversibility. These results indicate that controlling the diffusivity of viologens is an effective approach to achieve excellent bistability and low energy consumption.
Article
Chemistry, Physical
Guodong Liu, Zijian Wang, Jianing Wang, Hanbin Liu, Zhijian Li
Summary: This study investigates the combination of multicolor switchable polyaniline (PANI) electrode and 1-methyl-4,4'-bipyridyl iodide (MBI), which demonstrates superior optical properties in visible and near-infrared light modulation, as well as excellent electrochemical performances. This combination can be used to develop novel electrochromic devices for applications in smart packaging, smart labels, and flexible smart windows.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Engineering, Electrical & Electronic
Jing-Ju Huang, Hsuan- Liang, Hsing-An Lin, Shyh-Chyang Luo
Summary: This paper describes ambipolar polymers made of penta(N-alkyl carbazole)-corannulene extended viologen for use as an electrochromic supercapacitor. The introduction of nonconjugated linker alkyl chain helps the polymer display excellent electrochromic behavior in both neutral and doped states, and pursue a transparent-to-color effect. However, the length of the alkyl chain affects the optical contrast and specific capacitance of the polymers.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jing-Ju Huang, Hsuan- Liang, Hsing-An Lin, Shyh-Chyang Luo
Summary: This paper describes the use of ambipolar polymers made of penta(N-alkyl carbazole)-corannulene extended viologen as electrochromic supercapacitors. The polymers exhibit high optical contrast and specific capacitance.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Je Hyeong Kim, Seobin Park, Jinhyuck Ahn, Jaeyeon Pyo, Hayeol Kim, Namhun Kim, Im Doo Jung, Seung Kwon Seol
Summary: This work presents a novel micro-printing strategy for forming Prussian blue (PB) patterns. The PB-based EC displays can be cost-effective, easily producible, and efficiently operable, making them suitable for specific applications in smart devices. The printed PB pattern can be converted to Prussian white and integrated into a smart contact lens to display directions to a user.
Article
Chemistry, Multidisciplinary
Zhiyuan Bai, Xilu Wu, Rui Fang, Ziqiu Lu, Chengyi Hou, Qinghong Zhang, Yaogang Li, Kerui Li, Hongzhi Wang
Summary: This study utilizes a divalent viologen cation-based ionogel to enhance the optical modulation ability of electrochromic polymers for potential applications in flexible e-paper displays.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Suchita Kandpal, Ilya Ezhov, Manushree Tanwar, Denis Nazarov, Denis Olkhovskii, Leonid Filatov, Maxim Yu. Maximov, Rajesh Kumar
Summary: In order to design solid state hybrid or all-inorganic electrochromic devices, alternative methods for depositing electrochromic metal oxide thin films need to be explored. The electrochromic performance of a hybrid device using plasma assisted atomic layer deposition (ALD) grown nickel oxide (NiO) thin film and viologen was studied. The films of NiO with a thickness of a few tens of nanometers were first deposited on silicon, and then on Fluorine-doped Tin Oxide (FTO)/glass substrates to fabricate the device. The as-prepared films were analyzed for their structural and morphological properties, and a solid state organic-inorganic hybrid electrochromic device was fabricated. The device demonstrated impressive electrochromic behavior with high coloration efficiency, contrast ratio, and cycle life/stability. The ALD grown films showed advantage over other methods in terms of the smoothness and crack-free nature, allowing for proper power utilization in color switching. These results provide a new way to fabricate high-performance hybrid solid state electrochromic devices.
Article
Nanoscience & Nanotechnology
Tanushree Ghosh, Suchita Kandpal, Chanchal Rani, Love Bansal, Manushree Tanwar, Rajesh Kumar
Summary: In this study, a versatile and easily processible electrochromic device based on polyaniline-Viologen (PANI-EV) was reported. The electrodes were individually characterized and the device showed improved electrochromic performance with fast switching time and good cycle life. The device could switch in visible, IR, and NIR regions with low bias voltage.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Applied
Pawan P. More, Pramod Rathod, John Marc C. Puguan, Hern Kim
Summary: The fabrication of an all-in-one hybrid ionogel based on MOFs and 1-hexyl-[4,4'-bipyridin]-1-ium bis (trifluoromethane sulfonyl) imide [MHV][TFSI] as an electrochromic device (ECD) is reported in this study, showing reversible multicolor property with stability over 2000 cycles. The ECD displayed fast coloration and bleaching times, along with a high coloration efficiency. The study introduces a novel way to fabricate MOF based electrochromic ionogel (ECIG) ECDs and advances the development of electrochromic ionogel-based display devices.
Article
Energy & Fuels
Rambabu Sydam, Manoranjan Ojha, Melepurath Deepa
Summary: The addition of a disodium salt of ethylenediamine tetra acetic acid (EDTA) to the ionogel electrolyte addresses the issue of poor efficiency and undesirable stacking in Heptyl viologen (HV) based electrochromic devices, resulting in improved performance metrics and thermal robustness.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Xiaoxu Ran, Jie Ren, Shufen Zhang, Yue Wu, Suli Wu
Summary: This study presents a hollow-SiO2-supported WO3 photonic crystal with tunable refractive index, resulting in large-area PC samples with good surface morphology and bright multicolor output. The pixelated structure can dynamically display different numeric and alphabetic patterns.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hyeok-jin Kwon, Heqing Ye, Kyuwon Shim, Henok Getachew Girma, Xiaowu Tang, Bogyu Lim, Yejin Kim, Jihoon Lee, Chan Eon Park, Seo-Hyun Jung, Jong Mok Park, Yu Jin Jung, Do-Hoon Hwang, Hoyoul Kong, Se Hyun Kim
Summary: New solution-processable copolymers containing carboxyl and hydrophobic functionalities were synthesized, with the use of a fluorophenyl azide (FPA) based UV-assisted crosslinker to promote the movement of polar carboxyl groups and hydrophobic functionalities in thin film. This strategy maintained high dielectric constant characteristics and hydrophobic surface, eliminating trapsites and allowing stable operation and efficient charge transport.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xiaowu Tang, Hyeok-jin Kwon, Zhijun Li, Rixuan Wang, Se Jin Kim, Chan Eon Park, Yong Jin Jeong, Se Hyun Kim
Summary: Direct drawing techniques have simplified the patterning of soft electronic materials used in analog and digital integrated circuits. Selective deposition of gate insulators (GI) is equally important, and this study demonstrates the fabrication of six types of printed GI layers for use in organic field-effect transistors (OFETs) using electrostatic-force-assisted dispensing printing technique, resulting in practical integrated devices with robust performance and high gain values.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xiaowu Tang, G. Murali, Hyungjin Lee, Seongmin Park, Seongeun Lee, Sun Moo Oh, Jihoon Lee, Tae Yun Ko, Chong Min Koo, Yong Jin Jeong, Tae Kyu An, Insik In, Se Hyun Kim
Summary: This study presents a promising approach for modifying MXene nanosheets to achieve desirable properties suitable for large-area printing processes, suggesting the feasibility of using MXene in practical applications involving all-printed electronics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Cheolmin Jung, Xiaowu Tang, Hyeok-jin Kwon, Rixuan Wang, Sun Moo Oh, Heqing Ye, Yu Rim Jeong, Yong Jin Jeong, Se Hyun Kim
Summary: Organic printable dielectric layers, particularly gate insulators (GIs) in organic field-effect transistors (OFETs), were fabricated using optimized electrohydrodynamic (EHD) jet printing with an electrostatic force-assisted mode. The resulting PVA-based dielectric patterns showed superior insulating properties and allowed for stable operation of OFETs with low gate leakage currents. Additionally, the feasibility of using EHD-printed PVA layers as GIs in organic complementary logic gates was demonstrated.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Applied
Keon-Woo Kim, Jae Kyeong Lee, Xiaowu Tang, Yujeong Lee, Jihyeon Yeo, Hong Chul Moon, Seung Woo Lee, Se Hyun Kim
Summary: EC materials, particularly EC polymers, show promise for applications in smart windows and information displays due to their color tuning capabilities. A new EC polymer with redox-active triphenylamine and viologen was synthesized and utilized in ECDs, demonstrating multiple colors based on applied voltage. Additionally, voltage-tunable multicolor EC displays were successfully created using EFAD printing.
Article
Nanoscience & Nanotechnology
Zhijun Li, Yong Jin Jeong, Jisu Hong, Hyeok-jin Kwon, Heqing Ye, Rixuan Wang, Hyun Ho Choi, Hoyoul Kong, Hyeongjin Hwang, Se Hyun Kim, Xiaowu Tang
Summary: The pi-conjugated polymer semiconductor PBDTTTffPI is soluble in organic solvents and suitable for EHD jet printing technology. Printed PBDTTTffPI semiconductor layers in OFETs show better electrical characteristics than spin-coated films, with integrated devices such as inverters and NOR gates demonstrating good switching behaviors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Heqing Ye, Hyeok-jin Kwon, Su Cheol Shin, Hwi-young Lee, Young Ho Park, Xiaowu Tang, Ruxian Wang, Kanghyuck Lee, Jisu Hong, Zhijun Li, Wonkyo Jeong, Jiyeong Kim, Chan Eon Park, Jihoon Lee, Tae Kyu An, Insik In, Se Hyun Kim
Summary: This study demonstrates a novel strategy to induce high-k characteristics with durable polysilsesquioxane (PSQ)-based dielectrics, paving the way for the production of practical and printable high-k dielectrics for low-voltage-operating high-performance organic field-effect transistors (OFETs). Different PSQs exhibit distinct polarization phenomena, leading to different hysteresis behaviors during device operation.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Yejung Choi, Keon-Woo Kim, Ye Ryeong In, Xiaowu Tang, Philgon Kim, Vu Hong Vinh Quy, Yong Min Kim, Jaeyong Lee, Chungryong Choi, Cheolmin Jung, Se Hyun Kim, Hong Chul Moon, Jin Kon Kim
Summary: By utilizing hybrid electrodes containing mesoporous TiO2 functionalized with various phosphonated viologens, we successfully created multicolor, dual-image, printed electrochromic displays with fast switching speed and high coloration efficiency. The introduction of a tandem configuration with double-sided fluorine-doped tin oxide electrode between two hybrid electrodes allowed for more diverse colors in a single cell with independent or simultaneous operation of each hybrid electrode. These printed, tandem structured ECDs have the potential for next-generation transparent displays.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Hyeok-jin Kwon, Xiaowu Tang, Seonghyeon Kim, Zhijun Li, Rixuan Wang, Byung Ho Park, Cheulhwan Kim, Soyeon Kim, Jisu Hong, Ka Yeon Ryu, Hyun Ho Choi, Tae Kyu An, Jihoon Lee, Se Hyun Kim
Summary: Solution-based printing technology is convenient for the fabrication of printed electronics, with solution-processable organic semiconductors (OSCs) being promising candidates. By using electrohydrodynamic (EHD) jet-printing in the dragging mode, p- and n-type OSCs were successfully printed and exhibited ambipolar transport properties. The combination of single and mixed OSC layers enabled the preparation of various charge-transported devices, showing multiple logic functions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Kyunghun Kim, Sun Moo Oh, Jisu Hong, Cheolmin Jung, Jungyoon Seo, Yong Jin Jeong, Hwa Sung Lee, Se Hyun Kim
Summary: Printing organic semiconducting crystals with EHD technology on chemically patterned substrates can suppress the coffee-ring effect and produce uniform high-quality crystals oriented along the printing direction.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Editorial Material
Polymer Science
Vineet Kumar, Xiaowu Tang
Article
Materials Science, Multidisciplinary
Xiaowu Tang, Henok Getachew Girma, Zhijun Li, Jisu Hong, Bogyu Lim, Seo-Hyun Jung, Yejin Kim, Sang Yong Nam, Kyunghun Kim, Hoyoul Kong, Se Hyun Kim
Summary: In this study, the facile dragging mode EHD jet printing of a polymer-wrapped semiconducting single-walled carbon nanotube ink was investigated for fabricating NO gas-sensing field-effect transistors. By optimizing printing parameters, high-performance FETs were obtained, which were demonstrated to be effective NO sensors with high sensitivity and selectivity. The dragging mode EHD jet printing simplifies patterning processes and shows potential as a reproducible method for the fabrication of next-generation gas sensors.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Engineering, Electrical & Electronic
Hyeok-jin Kwon, Kibeom Nam, Zhijun Li, Xiaowu Tang, Cheolmin Jung, Chan Eon Park, Xinlin Li, Dong Yun Lee, Se Hyun Kim
Summary: The study presents a facile and scalable strategy for fabricating poly(3-hexylthiophene-2,5-diyl) (P3HT) patterns through flow-blade coating process, achieving enhanced edge-on orientation of P3HT with uniform electrical and morphological properties in large-area integrated OFET arrays. Various surface-modified dielectrics influenced the morphological properties of patterned P3HT, with alkyl-terminated self-assembled monolayers achieving optimum conditions for OFETs. Analysis tools revealed that flow-blade coating produces P3HT patterns with improved edge-on orientation and consistent films regardless of pattern width.
ACS APPLIED ELECTRONIC MATERIALS
(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)
