Article
Chemistry, Physical
Min Li, Tao Wang, Xiang-Le Liu, Ze-Long Bao, Peng-Fei Qian, Kun Liu, Yaling Shi, Xianbing Ming, Hong-Zhang Geng
Summary: Transparent conductive films (TCFs) with PTA/Au secondary p-type doped SWCNTs as a conductive layer were prepared and employed as heating devices. The films showed excellent optoelectronic properties, mechanical properties, stability, and electrical heating properties. Transparent flexible heaters (TFHs) made of PTA/Au dual p-type doped SWCNT TCFs demonstrated quick response to temperature changes and outstanding cycling stability.
Article
Chemistry, Multidisciplinary
Lior Snarski, Idan Biran, Tatyana Bendikov, Iddo Pinkas, Mark A. Iron, Ifat Kaplan-Ashiri, Haim Weissman, Boris Rybtchinski
Summary: In this study, single-wall carbon nanotubes (SWCNTs) were efficiently exfoliated and functionalized using a common dye molecule, resulting in highly mechanical robust and electrically conductive SWCNT materials. Flexible transparent conductive electrodes based on these materials showed excellent optoelectronic performance suitable for touch screens and LEDs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Guiyin Fang, Jingwei Wang, Qing Yang, Mengya Li, Haiou Huang
Summary: This study investigates cathodic lysis of bacteria and biofilms on carbon nanotube (CNT) membrane as a novel mechanism for biofouling reduction. The results show that cathodic electrolysis can effectively eliminate sessile bacteria on the CNT membrane and reduce the density and coverage of biofilms.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jinling Zhang, Min Wang, Zhaohui Yang, Xiaohua Zhang
Summary: A conductive whisker carbon nanotube film was fabricated using a simplified Langmuir-Blodgett method, demonstrating high sensitivity and wide strain sensing range for monitoring human muscle activity.
Article
Materials Science, Multidisciplinary
Le N. M. Dinh, Bich Ngoc Tran, Vipul Agarwal, Per B. Zetterlund
Summary: This study explores the effects of different preparation methods on polymer nanocomposite materials, and finds that the stability and physical properties of the nanocomposite films are greatly influenced by the preparation method and compositional details.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
YAN Wenqing, ZHANG Zeyao, LI Yan
Summary: This article introduces the importance and key issues of carbon nanotube films in the field of flexible transparent conductive films, focusing on the controlled preparation methods of carbon nanotube films based on floating catalyst chemical vapor deposition.
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
(2022)
Article
Materials Science, Ceramics
Li Zeng, Faguo Wang, Sumei Han, Moying Li, Siyang Tu, Qipeng Lu, Wenbin Cao
Summary: Superhydrophobic and superoleophilic porous foams were successfully prepared through low-temperature sintering method, allowing for efficient oil/water separation with good adsorption of organic solvents and water repellency properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Yu Wang, Jin-Tian Huang
Summary: The study improved the conductivity, transparency, and superhydrophobicity of cellulose film by grafting long-chain silanes on the surface, followed by electrospinning and electroless plating, showing a promising method for manufacturing transparent, conductive, and super-hydrophobic films in the future.
Article
Chemistry, Multidisciplinary
Zeyao Zhang, Wenqing Yan, Yuguang Chen, Shaochuang Chen, Guodong Jia, Jian Sheng, Sheng Zhu, Zihan Xu, Xinrui Zhang, Yan Li
Summary: A feasible strategy using solid acids to dope single-walled carbon nanotube films was developed, reducing sheet resistance while maintaining transmittance and flexibility. This doping technique demonstrated p-type doping, as shown by Raman spectra and Kelvin probe force microscopy measurements. The strong acidity of the dopant played a key role in increasing the redox potential and Fermi level of the SWCNTs, leading to enhanced conductivity in flexible transparent conductive films.
Article
Materials Science, Multidisciplinary
Suresh Kumar, Twinkle, Manpreet Kaur
Summary: The study demonstrates a facile method to prepare highly conductive graphene nanoribbons via microwave treatment of acid processed carbon nanotubes, which is an important step towards the development of GNR based electronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Physics, Applied
Hao-Sheng Lin, Riku Hatomoto, Daisuke Miyata, Miftakhul Huda, Il Jeon, Satoru Hashimoto, Takeshi Hashimoto, Yutaka Matsuo
Summary: This study demonstrates the application of wet-processed SWCNT films prepared using scalable eDIPS technology in high-performance organic solar cells. The use of acid dopants improves the conductivity and interfacial morphology of the SWCNT films, resulting in enhanced PCE efficiency.
APPLIED PHYSICS EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Kaitlin Wagner, Arnold J. Kell, Yadienka Martinez-Rubi, Chantal Paquet, Benoit H. Lessard
Summary: This paper reports on the design and process optimization of highly conductive and mechanically robust transparent heaters using screen-printable silver metal microgrids over a layer of boron nitride nanotubes (BNNT). The study explores different geometries, line widths, and pitch combinations to create 16 grid designs with optical transparency ranging from 65% to 89% and resistance values as low as 2.90 omega sq(-1). The BNNT coating on the substrate enhances mechanical stability and improves thermal performance by initiating electrical sintering during heater operation.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Jaewon Kim, Owen Kendall, Jiawen Ren, Billy J. Murdoch, Christopher F. McConville, Joel van Embden, Enrico Della Gaspera
Summary: This study successfully fabricated CuCrO2 p-type transparent electrodes with outstanding optical and electrical properties and tuned their properties through careful screening of deposition conditions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Ziying He, Zhexi Xiao, Hongjie Yue, Yaxin Jiang, Mingyu Zhao, Yukang Zhu, Chunhui Yu, Zhenxing Zhu, Feng Lu, Hairong Jiang, Chenxi Zhang, Fei Wei
Summary: Silicon-based anodes with single-walled carbon nanotubes (SWCNTs) network exhibit higher initial discharge capacity, higher initial Coulombic efficiency, exceptional cyclic stability, and higher lithium-ion diffusion coefficient compared to those with multiwalled carbon nanotubes (MWCNTs) network. The underlying mechanism behind this difference is elucidated through in situ Raman spectroscopy and theoretical analysis. It is determined that the more flexible SWCNTs and their stronger van der Waals forces enable better contact between SiOx@C and SWCNTs under large stress during cycling.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Changhua Yang, Yanan Wu, Min Nie, Qi Wang, Yuansen Liu
Summary: In this study, interlocking interfaces were successfully constructed in a polyurethane conductive composite by introducing zinc oxide nanowires with brush-like carbon fibers, greatly improving the mechanical strength and conductive stability of the material. High mechanical strength and stable conductivity were demonstrated in the composite, and the novel stretchable conductor showed potential applications in thermal therapy units and flexible circuits.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Sangho Kim, Malkeshkumar Patel, Sung-Min Youn, Youngkuk Kim, Kibum Lee, Joondong Kim
Summary: Transparent photovoltaics (TPVs) are energy-generating devices made of transparent material and incorporating solar cell technology. They aim to harness energy from common structures like windows and vehicles for sustainable power generation. A ZnO-based back reflection method is introduced to manage light in TPVs, resulting in large-scale TPVs with high power conversion efficiency and long-term stability. The combination of n-type ZnO, p-type NiO, and a thin Si film improves solar cell performance, enabling TPVs to generate power even under indoor illumination.
MATERIALS TODAY ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Malkeshkumar Patel, Shuvaraj Ghosh, Joondong Kim
Summary: Recently, transparent photovoltaic (TPV) and photoelectrochemical (TPEC) cells based on sputtered BiVO4 thin films have attracted attention for their potential in see-through energy systems. The devices doped with Mo showed improved performance, with an average visible transmittance of 60% and enhanced absorption for blue wavelength photons. The Mo:BiVO4-based TPV-TPEC device exhibited a high open circuit voltage and stable power production, making it a promising option for onsite energy generation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Shuvaraj Ghosh, Malkeshkumar Patel, Junsik Lee, Joondong Kim
Summary: A high-performance transparent ultraviolet (UV) photodetector based on a ZnO/NiO heterojunction is reported, which operates in self-powered photovoltaic mode and exhibits outstanding responsivity and detectivity values of 6.9 A W-1 and 8.0 x 10(12) Jones, respectively. The heterostructure is deposited using a large-scale sputtering method to form a high-quality device. Furthermore, a 4 x 5 matrix array is developed with an output photovoltage of 4.5 V for integration into sensing and imaging systems. The transparent UV photodetector achieves the fastest photo-response time (83 ns) reported for array configurations, based on exciton-induced photovoltage from a neutral donor-bound exciton.
Article
Materials Science, Multidisciplinary
Thanh Tai Nguyen, Osigwe Chidingozi Emeka, Naveen Kumar, Priyanka Bhatnagar, Joondong Kim
Summary: A transparent broad spectral photodetector with a fast response time, high responsivity, and detectivity under ultraviolet light is constructed using a metal oxide heterojunction. The Cu2O/ZnO based device is improved by inserting an AZO layer between ZnO and the substrate (FTO) to achieve a back surface field effect. The structural, optical, and electrical properties of Cu2O based devices were comprehensively investigated.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Naveen Kumar, Junsik Lee, Malkeshkumar Patel, Hongsub Jee, Jaehyeong Lee, Joondong Kim
Summary: Smart buildings and near-zero-energy buildings require building integrated photovoltaic systems for energy minimization and photocommunication. Photocommunication windows in smart buildings can provide wireless and secure communication, as well as on-site power generation for internet of things applications. This work presents the development of a flexible photocommunication window based on a Ga2O3/Cu2O heterojunction, capable of detecting and recording Morse code-embedded photosignals while producing power.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Naveen Kumar, Malkeshkumar Patel, Min-Joon Park, Chaehwan Jeong, Joondong Kim
Summary: Transparent photovoltaic (TPV) devices are crucial for achieving invisible power generation, and a ZnO/Cu2O heterojunction with a Ga2O3 buffer layer has been developed to improve its transparency, open-circuit voltage, short-circuit current density, and photodetection performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Priyanka Bhatnagar, Malkeshkumar Patel, Kibum Lee, Joondong Kim
Summary: Researchers have developed an artificial broadband photoreceptor that mimics natural photoreceptors in detecting colors and their intensities. The photoreceptor operates in a self-powered mode and has a wide perception range. It exhibits excellent response time and a wide field-of-view, making it a promising candidate for flexible electronics.
Article
Materials Science, Multidisciplinary
Thanh Tai Nguyen, Ha Trang Nguyen, Ju-Hyung Yun, Jinjoo Park, Joondong Kim
Summary: A transparent conductor with an aluminum-doped zinc oxide (AZO)/Ag/Cu structure was developed for extracting power from transparent photovoltaics. The Cu layer acts as a seed layer for the growth of the Ag film. The AZO layer enhances the optoelectrical properties of Cu/Ag. The proposed Cu/Ag/AZO transparent conductor enables the development of transparent and flexible NiO/ZnO-based photovoltaics with a power conversion efficiency of 1.14%. This system shows promise for cost-effective and high-performance flexible optoelectronics.
Article
Chemistry, Multidisciplinary
Malkeshkumar Patel, Sangho Kim, Joondong Kim
Summary: Invisible power generation through natural and artificial light allows for sustainable onsite power deployment at a lower cost and with minimal impact on the built environment. However, existing opaque photovoltaics limit light utilization in a transparent way. To address this issue, the concept of active energy window (AEW) is proposed, which invisibly features power production in window objects without compromising human vision. The AEW integrates a transparent photovoltaic (TPV) for onsite power generation and a transparent heater (TH) to remove shadow effects and recover lost power.
Article
Engineering, Electrical & Electronic
Shuvaraj Ghosh, Malkeshkumar Patel, Chanhyuk Choi, Junghyun Lee, Joondong Kim
Summary: In this study, a co-sputtered Mo-doped BiVO4 thin films-based self-powered transparent photodetector (TPD) was developed. The TPD device showed a high photo-to-dark current ratio and detectivity, and exhibited fast response speed and high visible transparency. This Mo:BiVO4-based TPD device explores the potential of BiVO4 in the field of transparent optoelectronics and onsite power generation.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Naveen Kumar, Muhammad Kumail, Junghyun Lee, Hyeong Gi Park, Joondong Kim
Summary: In this study, a self-powered transparent photodetector consisting of a vdW semiconductor (SnS) and a wide-bandgap oxide (Ga2O3) thin film was successfully fabricated. The device is highly transparent with an average visible transmittance of 45%. Under illumination, the self-biased transparent photodetector exhibits photovoltaic behavior, with a significant open circuit voltage of 496 mV and a considerably high short-circuit current density of 1.7 mA/cm^2. The device shows a significant photoresponse from UV (340 nm) to NIR (850 nm) illumination, with a remarkable responsivity of 210.4 mA/W and the fastest response time of approximately 8 ms, making it a self-operated broadband transparent photodetector.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
Yujin Park, Joondong Kim, Ju-Hyung Yun, Segeun Jang, Sang Moon Kim
Summary: The pressure-driven liquid flow controller is a crucial component in various applications. The conventional safety valves have limitations, while electric feedback loop based flow controllers are expensive and complex. This study proposes a simple and controllable liquid-flowing system using an oil-gated isoporous membrane (OGIM) as a responsive and precise gas valve, enabling constant liquid flow.
Article
Chemistry, Multidisciplinary
Naveen Kumar, Thanh Tai Nguyen, Junsik Lee, Malkeshkumar Patel, Priyanka Bhatnagar, Kibum Lee, Joondong Kim
Summary: Omnidirectional photosensing is crucial for optoelectronic devices, enabling a wide field of view and potential applications in the Internet of Things. Developing a transparent photovoltaic device with a 360 degrees field of view, ultra sensitivity to photons, power generation, and transparency is important. This study fabricates a transparent photovoltaic device with a 360 degrees field of view using a SnS/Ga2O3 heterojunction, demonstrating bifacial onsite power production and broadband fast photoresponse. Impedance spectroscopy analysis reveals an ultra-sensitive photoinduced defect-modulated heterojunction and photocapacitance.
Article
Engineering, Environmental
Deasung Kim, Thanh Thao Tran, Vishwa Bhatt, Ha Trang Nguyen, Joondong Kim, Manjeet Kumar, Ju-Hyung Yun
Summary: The increasing concerns over environmental pollution caused by urbanization and modernization have led to a focus on gas sensors. This study synthesized Zn2SnO4 octahedrons using a hydrothermal method and studied the effect of synthesis conditions on their sensing performance. The Zn2SnO4 sample synthesized in 12 hours showed the best gas sensing characteristics.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Malkeshkumar Patel, Shuvaraj Ghosh, Jeong Eun Park, Jungeun Song, Dong-Wook Kim, Joondong Kim
Summary: In this study, a TPV device based on a transparent n-type absorber/p-type NiO heterojunction was prepared, and the optical properties of the transparent absorbers and the effect of the dielectric constant values of the absorber layers on the device performance were investigated. All fabricated TPV devices exhibited high optical transparency and sensitivity to ultraviolet lights, and showed self-powered behavior.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
