Article
Nanoscience & Nanotechnology
Yong Lin, Lin Wang, Tao Ma, Likang Ding, Shitai Cao, Gaohua Hu, Jiaxue Zhang, Xiaohui Ma, Yuping Sun, Qian Wang, Desheng Kong
Summary: This study reports a simple coating process to create Ag NW nanocomposites on various flexible/stretchable substrates, which exhibit excellent conductivity and high deformability. The patterned features of conductive nanocomposites can be conveniently accessed using shadow masks or selective laser ablation.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yong Lin, Ting Fang, Chong Bai, Yuping Sun, Cheng Yang, Gaohua Hu, Haorun Guo, Weijie Qiu, Weixi Huang, Lin Wang, Zihao Tao, Yan-qing Lu, Desheng Kong
Summary: This study presents an electrically self-healing and ultrastretchable conductor for deformable electronic devices. It utilizes bilayer silver nanowire/liquid metal microcapsule nanocomposites to achieve ultrahigh stretchability, minor changes in resistance during stretching, and stable resistance after repetitive deformations. These conductors have been successfully applied in skin-attachable electronic patches and stretchable light-emitting diode arrays.
Article
Nanoscience & Nanotechnology
Jianfang Liu, Yongjie Ge, Dumeng Zhang, Mei Han, Moxia Li, Meng Zhang, Xidong Duan, Zhilin Yang, Jiawen Hu
Summary: Plasma treatment has been shown to be an effective strategy for removing the insulating PVP layer from silver nanowire films and self-limited welding the NW/NW junctions, resulting in improved carrier transport properties without affecting transparency. The plasma-treated Ag NW film exhibited significantly enhanced conductivity and flexibility, making it suitable for applications such as high-performance flexible transparent heaters. Additionally, the plasma-treated Ag NW also demonstrated potential as a basic electrode in electron-only devices, significantly improving current collection efficiency.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoli Duan, Yu Ding, Ruiyuan Liu
Summary: This article discusses the importance of flexible transparent electrodes in flexible organic solar cells and the advantages of using silver nanowires as an ideal candidate material. However, the stability of silver nanowires as transparent electrodes is a key limitation for their applications. The article provides a comprehensive analysis and summary of the failure mechanisms, reinforced materials, and stability enhancement strategies for silver nanowires, as well as surveys their application in flexible batteries.
MATERIALS TODAY ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Hung-Shuo Chang, Pan Feng, Yadong Lyu, Chiao-Chi Lin
Summary: This study investigates the degradation behavior of silver nanowires (AgNWs) under different stressors. The results show that exposure to UVA at elevated temperature and electrical stress can cause electrical failure of AgNW networks, while sulfidation can reduce the optical transparency of AgNW networks.
Article
Chemistry, Multidisciplinary
Davide Grazioli, Alberto C. C. Dadduzio, Martina Roso, Angelo Simone
Summary: A computational strategy was developed to evaluate the electrical homogeneity of nanowire electrodes. The strategy involves modeling the electrodes as two-dimensional networks and computing the electrical power in each square of the network. The evaluation indicated that a high degree of homogeneity can be achieved even with a small difference in resistance between nanowires and junctions.
Article
Nanoscience & Nanotechnology
Henrik Myja, Zhiqiao Yang, Irene A. Goldthorpe, Alexander J. B. Jones, Kevin P. Musselman, Annika Grundmann, Holger Kalisch, Andrei Vescan, Michael Heuken, Tilmar Kuemmell, Gerd Bacher
Summary: Transition metal dichalcogenide (TMDC) monolayers have emerged as highly promising semiconducting materials for optoelectronic applications, with their direct band gap in the visible to near-infrared spectral range. In this work, transparent light-emitting devices (LEDs) were fabricated using TMDC monolayers and a silver nanowire (AgNW) network as a transparent top electrode. The devices showed good performance with an average transmittance of over 60% in the visible spectral range, emissive areas of several mm(2), and a turn-on voltage of around 3 V.
Article
Nanoscience & Nanotechnology
Sebastien Hanauer, Caroline Celle, Chiara Crivello, Helga Szambolics, David Munoz-Rojas, Daniel Bellet, Jean-Pierre Simonato
Summary: This study reports on the fabrication and investigation of low-emissivity coatings based on silver nanowires (AgNWs), which exhibit low emissivity and transparency. However, the poor intrinsic surface adhesion of AgNWs makes the coating fragile. Two efficient encapsulation processes involving conformal alumina thin film deposition and solution processed layer deposition of polysiloxane varnish have been developed to address this weakness, resulting in mechanically resistant low-E coatings with excellent optical transmittance properties.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jingkai Han, Jiankui Yang, Weiwei Gao, Hao Bai
Summary: Flexible transparent electrodes with high optical transmittance and low sheet resistance have been achieved by coating silver nanowires using a 2D ice-templating approach. The electrodes demonstrate excellent durability during cyclic bending and stretching, making them suitable for applications in touch screens and electronic skin sensors. This study represents a simple and cost-effective method to assemble various nanomaterials into large-area functional patterns for advanced flexible devices.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Amit Kumar, Muhammad Omar Shaikh, Cheng-Hsin Chuang
Summary: The synthesis methods of silver nanowires and their application in transparent conducting electrodes are reviewed in detail, including various synthesis protocols and deposition techniques. Additionally, treatments for enhancing their optoelectronic properties are also discussed.
Article
Chemistry, Applied
Jia-Sheng Tang, Cheng-Ying Lee, Ying-Chih Liao
Summary: A coating method is developed to produce chemical resistant transparent conductive films (TCFs) by mixing ultrasonicated cellulose nanofibers and silver nanowires (AgNWs). The resulting coating shows low sheet resistance, high transparency, excellent adhesion, and remains conductive under harsh conditions. Cross-linking with citric acid further enhances the chemical and mechanical stability of the TCF, making it suitable for optoelectronic applications.
PROGRESS IN ORGANIC COATINGS
(2023)
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
Nanoscience & Nanotechnology
Yu Zhao, Wenzhe Huang, Jiachen Kang, Xin Xi, Yuhou Pei, Gufeng He
Summary: This study presents a method to enhance the stability of silver nanowire (AgNW) films by passivating them with a metal-organic framework (MOF) through a simple solution process. The MOF chemically bonds to the AgNW surface, inhibiting highly active sites and providing chemical protection, leading to improved stability under an ambient atmosphere. The binding interaction of MOF with AgNWs also enhances the conductivity and welding between the nanowires, while maintaining flexibility and adhesion properties. The MOF-modified AgNW electrode exhibits comparable performance to an indium tin oxide-based electrode in an OLED device, suggesting its great potential for optoelectronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Jong-Seol Park, Tae-Gon Park, Jin-Seok Park
Summary: The study presented a new method for manufacturing a grid patterned silver nanowire (AgNW) flexible transparent electrode with low sheet resistance, high transmittance, and high flexibility. It was found that thermal treatment and mechanical compression improve the flexibility and resistance properties of AgNW, but the temperature during treatment is critical.
ELECTRONIC MATERIALS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yiting Chen, Greg Bannard, R. Stephen Carmichael, Tricia Breen Carmichael
Summary: Silver nanowires (AgNWs) are promising materials for transparent conductive electrodes in optoelectronic devices, but their practical use is hindered by corrosion under ambient conditions. This study presents a novel approach using a transparent synthetic rubber, TBR, as a stretchable substrate and a protective gas barrier, which effectively prevents corrosion and enhances the durability of AgNW networks.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Jong-Heon Yang, Chun-Won Byun, Jae-Eun Pi, Hee-Ok Kim, Chi-Sun Hwang, Seunghyup Yoo
Summary: This study improved memory erase speed in amorphous oxide semiconductor memory thin-film transistor (TFT) by introducing new double-gate and body-contacted memory structures.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Environmental
Youson Kim, Junmo Kim, Chan Young Kim, Taehyun Kim, Chungryeol Lee, Kihoon Jeong, Woosung Jo, Seunghyup Yoo, Taek-Soo Kim, Kyung Cheol Choi, Sung Gap Im
Summary: In this study, a substrate platform with excellent mechanical durability and deformability is developed by introducing a multi-layer polymer film (MLPF) and precisely engineering the modulus of each layer. The developed substrate platform exhibits outstanding robustness against various modes of deformations, particularly in tensile deformation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Editorial Material
Optics
Seunghyup Yoo, Youngjin Song, Sangin Hahn
Summary: Hour-level persistent luminescence is achieved by embedding carbon dots in cyanuric acid, which is easily obtained by microwave-assisted heating of carbon dots and urea. The proposed composition forms donor-acceptor blends, resulting in intermediate states with long lifetimes and providing a rare-earth-metal-free approach to ultralong persistent luminescence.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Engineering, Environmental
Sunghoon Kim, Seokwoo Kang, Seungmin Baek, Jinouk Song, Na-Eun Mun, Hyukmin Kwon, Hyo-Geun Kwon, Yong-Jin Pu, Tae-Woo Lee, Seunghyup Yoo, Jong-Min Oh, Jongwook Park, Sang-Wook Kim
Summary: This study presents a novel process for producing thin luminescent films that completely convert colors and enhance light intensity. The films are prepared by co-depositing perovskite quantum dots and metal oxide particles as color conversion layers and scattering agents. The films can be directly deposited on blue organic light-emitting diodes using ultrasonic-assisted aerosol deposition (UAD), eliminating the need for color filters.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Palanisamy Rajakannu, Woochan Lee, Sanghoon Park, Hyung Suk Kim, Hanif Mubarok, Min Hyung Lee, Seunghyup Yoo
Summary: In this study, phenylpyridazine-based bidentate ligands were synthesized and used for the preparation of dinuclear Pt(II) complexes. The complexes exhibited intense emissions in the NIR region, high photoluminescence quantum yields, and short phosphorescence decay lifetimes. The functional groups or atoms in the ligands played crucial roles in the formation of emitters with significantly shortened Pt center dot center dot center dot Pt distances. The resulting non-doped NIR OLEDs showed good electroluminescence performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Young Hoon Lee, Woochan Lee, Taehwan Lee, Jaehoon Jung, Seunghyup Yoo, Min Hyung Lee
Summary: The design of robust TADF emitters is crucial for efficient and stable blue TADF-OLEDs. This study presents boron-based blue TADF compounds with a spiro-type boron acceptor and DPAC or sAC donors. The compounds exhibit short-lived delayed fluorescence and fast reverse intersystem crossing, leading to high-efficiency blue TADF-OLEDs with maximum EQEs over 30%. The device with the fully spiro 2 achieves a state-of-the-art EQEmax of 36.4% and a suppressed efficiency roll-off, highlighting the synergistic effect between the spiro-structure and the B-heterotriangulene acceptor skeleton.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nutrition & Dietetics
Hyuk Joo Lee, Seunghyup Yoo, Jung Kyung Hong, Jun Seok Ahn, Eunyoung Lee, Hanul Moon, Sunhyoung Koo, Tae Kim, Jaehyeok Park, In-Young Yoon
Summary: This study found that a prototype wearable LED UVB device was effective in improving serum 25-hydroxyvitamin D levels, with an average production of 0.031 ng/mL of vitamin D per 1 cm² of skin area.
EUROPEAN JOURNAL OF CLINICAL NUTRITION
(2023)
Article
Energy & Fuels
Shashi B. B. Srivastava, Ramakant Sharma, Divambal Appavoo, Bimlesh Lochab, Sangin Hahn, Seunghyup Yoo, Samarendra P. P. Singh
Summary: A hybrid thin film, (PC61BM-ZnO)(DEZ), is proposed as a cathode buffer layer for organic solar cells. The thin film can be deposited via a one-step solution-processable method and requires low annealing temperatures. Compared to conventional ZnO thin films, the devices with (PC61BM-ZnO)(DEZ) as a buffer layer show improved performance.
Article
Materials Science, Multidisciplinary
Ji Hun Choi, Chan Woo Park, Bock Soon Na, Jong-Heon Yang, Jeho Na, Jae-Eun Pi, Hee-Ok Kim, Chi-Sun Hwang, Seunghyup Yoo
Summary: Highly-stable molybdenum/aluminum (Mo/Al) bilayered electrodes are promising for use in stretchable electronics. The serpentine-shaped Mo/Al bilayer electrode can operate with up to 220% elongation without resistance change. By inserting Mo underneath the Al layer, the issue of Al penetration into polyimide (PI) can be overcome, resulting in robust and highly conductive stretchable electrodes. The fabricated devices, which are stretchable thin-film transistor arrays, show stable performance even under highly stretched conditions.
JOURNAL OF INFORMATION DISPLAY
(2023)
Article
Optics
Chanhyung Park, Jeongmin Shin, Sanmun Kim, Songju Lee, Juho Park, Jaehyeok Park, Sehong Park, Seunghyup Yoo, Min Seok Jang
Summary: Researchers propose a new simulation method, called the diffraction matrix method (DMM), that accurately predicts the optical characteristics of periodically corrugated OLEDs with significantly faster calculation speed. The method decomposes the light emitted by a dipolar emitter into plane waves and tracks the diffraction behavior using diffraction matrices. The calculated optical parameters show quantitative agreement with those predicted by the finite-difference time-domain (FDTD) method. Furthermore, the method evaluates the wavevector-dependent power dissipation of a dipole and identifies the loss channels inside OLEDs in a quantitative manner.
Article
Nanoscience & Nanotechnology
Junho Kim, Eungjun Kim, Jaehyeok Park, Jinouk Song, Subon Kim, Hanul Moon, Seunghyup Yoo
Summary: This study proposes a new type of ultrathin substrate embedded with an inverted microlens array (IMLA) for highly efficient foldable OLEDs. The IMLA enables OLEDs to be bent at a sub-100 μm bending radius while maintaining high light outcoupling efficiency. The potential effects of optical diffraction and the local modulation of strain and stress in ultrathin devices are carefully analyzed, and the proposed OLEDs achieve a maximum external quantum efficiency of 58% without optical side effects, withstanding 10,000 trials of repeated folding tests at a bending radius of 50 μm.
Article
Chemistry, Multidisciplinary
Hyeonwook Chae, Yongjin Park, Yehhyun Jo, Yongmin Jeon, Hyunjoo Jenny Lee, Seunghyup Yoo, Kyung Cheol Choi
Summary: Optoelectronics devices utilizing OLEDs are promising platforms for healthcare applications, particularly wearable visual stimulus systems for sleep disorder intervention. This study proposes two improvements for TrOLEDs, including a high refractive index zinc sulfide layer and an ultra-thin silver cathode, achieving a luminous transmittance of 91%. By introducing a doping process to the electron transport layer, TrOLEDs with high transmittance can achieve a lifetime comparable to control OLEDs. A preclinical model using blue light is suggested to modulate sleep patterns, showing a reduction in non-rapid-eye-movement sleep duration in mice. These TrOLEDs offer convenience and potential for modulating sleep disorders such as insomnia and narcolepsy-cataplexy.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Multidisciplinary Sciences
Hyung Suk Kim, Hyung Jin Cheon, Donggyun Lee, Woochan Lee, Junho Kim, Yun-Hi Kim, Seunghyup Yoo
Summary: A new boron-based compound o-Tol-nu-DABNA-Me with sterically hindered peripheral phenyl groups was proposed to reduce intermolecular interactions and suppress excimer formation, resulting in a less sensitive narrowband emission to concentration. Deep-blue OLEDs with y-coordinate of 0.12 and a full width at half maximum of 18 nm were achieved with a maximum external quantum efficiency (EQE) of approximately 33%. By adopting a hyperfluorescent architecture, the OLED performance was further improved to an EQE of 35.4% with mitigated efficiency roll-off, demonstrating the significant potential of this method for energy-efficient deep-blue OLEDs.
Article
Chemistry, Multidisciplinary
Haechang Lee, Ramakant Sharma, Sehwan Park, Zhenan Bao, Hanul Moon, Seunghyup Yoo
Summary: A flexible pressure sensor based on a texturing-free piezocapacitive layer is proposed, which utilizes ion infiltration for electrical-double-layer modulation and exhibits excellent mechanical durability and linear response over a wide pressure range.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Young Hoon Lee, Jeoungmin Ji, Thi Quyen Tran, Taehwan Lee, Jaehoon Jung, Youngil Lee, Seunghyup Yoo, Min Hyung Lee
Summary: This study reports two TADF emitters with high horizontal transition dipole orientation and molecular rigidity, which exhibit excellent performance and high quantum efficiency in deep-blue emission.
MATERIALS CHEMISTRY FRONTIERS
(2023)