Article
Nanoscience & Nanotechnology
Mario Pelaez-Fernandez, Bruno Majerus, Daniel Funes-Hernando, Romain Dufour, Jean-Luc Duvail, Luc Henrard, Raul Arenal
Summary: High aspect-ratio gold nanostructures exhibit Fabry-Perot-like surface plasmon responses from infrared to visible light energies and can be tuned by laser irradiation. The plasmonic behavior of these nanostructures has been characterized using advanced analysis techniques, demonstrating the selective tuning of plasmonic modes within a specific spectral range.
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.
Review
Nanoscience & Nanotechnology
Wu Zhang, Haizeng Li, Eric Hopmann, Abdulhakem Y. Elezzabi
Summary: Electrochromism, an emerging energy conversion technology, is facing the major challenge of slow switching speed, especially in inorganic materials. Efficient design of nanostructured electrochromic materials is essential to achieve rapid switching speed and enhance their performance in real-world applications.
Review
Nanoscience & Nanotechnology
Wu Zhang, Haizeng Li, Eric Hopmann, Abdulhalcem Y. Elezzabi
Summary: Electrochromism is a promising energy conversion technology with diverse applications, but the major challenge lies in the slow switching speed in inorganic materials. Efficient design of nanostructured electrochromic materials is crucial for achieving rapid switching speeds. Various classification and synthesis methods for electrochromic materials were discussed in the review, along with outlining challenges and prospects for high-performance nanostructured electrochromic materials.
Article
Chemistry, Analytical
Yu Bai, Yahui Chuai, Yingzhi Wang, Yang Wang
Summary: This research demonstrates highly flexible and efficient OLEDs using an ultra-smooth NAN anode. The ultra-smooth NAN anode, created using a template-stripping process, maintains good performance and mechanical stability after bending. Compared with conventional OLEDs on PET/ITO substrate, the efficiency of the flexible OLEDs is improved by 30.6% due to enhanced hole injection from the ultra-smooth anode.
Article
Optics
Haonan Ling, Arnab Manna, Jialiang Shen, Ho-Ting Tung, David Sharp, Johannes Froch, Siyuan Dai, Arka Majumdar, Artur R. Davoyan
Summary: This study investigates the interaction between light and matter in van der Waals MoS2 nanophotonic devices and demonstrates deep subwavelength optical field confinement in nanostructures, which has the potential to significantly reduce the size of integrated photonic devices and opto-electronic circuits.
Article
Chemistry, Multidisciplinary
Qiang Fan, Jinlei Miao, Xuhua Liu, Xingwei Zuo, Wenxiao Zhang, Mingwei Tian, Shifeng Zhu, Lijun Qu, Xueji Zhang
Summary: In this study, we developed a robust transparent conductive mesh with biomimetic interwoven structure to address the trade-off challenge in flexible transparent electrodes. The hierarchically self-assembled conductive mesh showed excellent optoelectronic properties, making it suitable for high-performance wearable optoelectronics and camouflage electronics.
Article
Materials Science, Multidisciplinary
Wei-Kai Lee, Bo-Kai Wang, Kai-Chen Lin, Chung-Chih Wu
Summary: This study investigates the influence of bottom transparent electrode thickness on emission properties of OLEDs through simulation and experiments. By using a very thin ITO electrode and horizontal dipole emitters, the overall coupling efficiencies and external quantum efficiency of OLED emission into substrates can be greatly enhanced. The potential of using thin transparent electrodes for highly efficient OLEDs is clearly revealed.
ORGANIC ELECTRONICS
(2021)
Article
Optics
Liping Shi, Ihar Babushkin, Anton Husakou, Oliver Melchert, Bettina Frank, Juemin Yi, Gustav Wetzel, Ayhan Demircan, Christoph Lienau, Harald Giessen, Misha Ivanov, Uwe Morgner, Milutin Kovacev
Summary: Asymmetric plasmonic nanojunctions have shown potential for converting femtosecond optical pulses to current bursts on-chip, with a bandwidth reaching the multi-terahertz scale, albeit currently only achieved at low temperatures and pressures. These nanoscale devices are of great interest for novel ultrafast electronics and opto-electronic applications, with studies revealing the mechanisms of photoemission from plasmonic nanojunctions and fundamental limitations on the speed of optical-to-electronic conversion.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Shakti Prasad Mishra, Rashmita Panda, Sukanta Kumar Tripathy, Kusha Kumar Naik
Summary: This study investigates the efficient light extraction performance of synthesized zinc oxide quantum dots (ZnO-QDs) incorporated with polydimethylsiloxane (PDMS). The synthesized ZnO QDs are characterized using XRD, SEM, and UV-Vis spectroscopy, and their light extraction performance is examined on a glass surface coated with quantum dots above the light emitting diodes (LEDs). Experimental results are compared with simulated results for a better understanding, and the light extraction properties of the ZnO QDs are recommended for mass production and industrial application.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Ran Liu, Xiangyu Zhu, Shenghong Liu, Decai Ouyang, Xiaoxi Ma, Fangfang Xia, Yimeng Yu, Han Zhang, Jinsong Wu, Shiyuan Liu, Wenxi Liang, Yuan Li, Tianyou Zhai
Summary: A novel Au@MoS2 core-shell heterostructure with atomically sharp and dramatically enlarged interface enables ultrafast and high-efficiency hot electron transfer.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ran Liu, Xiangyu Zhu, Shenghong Liu, Decai Ouyang, Xiaoxi Ma, Fangfang Xia, Yimeng Yu, Han Zhang, Jinsong Wu, Shiyuan Liu, Wenxi Liang, Yuan Li, Tianyou Zhai
Summary: In this study, a novel Au@MoS2 core-shell heterostructure was created with atomically sharp and dramatically enlarged interface, enabling ultrafast and high-efficiency hot electron transfer. The results showed that the hot electron injection from Au nanoparticles to MoS2 in Au@MoS2 occurred within 244 fs, compared to 493 fs in the mechanically-transferred Au/MoS2 control sample. The injection efficiency was also improved from 3.33% to 25.3% in Au@MoS2. The improved charge transfer was attributed to the atomic-level clean and fully-encapsulated interface of the product, as confirmed by Kelvin probe force microscopy and discrete dipolar approximation studies. This study provides fundamental understanding of the intrinsic charge transfer within Au@MoS2 heterostructures and suggests a promising material geometry for future plasmonic and optoelectronic devices.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Chemical
Rahul Navik, Xiao Ding, Tan Huijun, Yaping Zhao
Summary: This study presents an efficient electroless plating method for synthesizing oxidation stable copper@silver core-shell nanowires, which were further used to fabricate transparent flexible electrodes and transparent stretchable heaters. The sintering process significantly improved the optical-electrical performance, oxidation stability, and mechanical flexibility of the fabricated TFEs and TSHs. Additionally, the high-saturation temperature and stability against repeated stretching cycles of the TSHs were enhanced.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Environmental
Jigeon Kim, Dongeon Kim, Wooyeon Kim, Sungho Woo, Se-Woong Baek, Min Jae Ko, Younghoon Kim
Summary: CsPbI3 perovskite quantum dots (CsPbI3-PQDs) have potential in semi-transparent photovoltaic absorbers. Dielectric/ultra-thin metal/dielectric (DMD) electrodes with excellent optical transmittance and electrical conductivity improve the photovoltaic performances. Asymmetric DMD electrodes reduce parasitic absorption loss and show higher average visible transmittance (AVT) than symmetric ones, resulting in the highest-efficiency semi-transparent PQD solar cells for solar window applications requiring an AVT value of over 20%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Yi Yang, Bowei Xu, Jianhui Hou
Summary: Organic solar cells have gained attention for their flexibility and semi-transparency, with silver nanowires being a promising candidate for transparent conducting electrodes. The review covers the properties, preparation methods, optimization approaches, and applications of AgNW-based TCEs in OSCs, as well as the challenges and guidelines for practical use.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yong Ha Hwang, Byeongju Noh, Junwoo Lee, Ho Seung Lee, Yongjin Park, Kyung Cheol Choi
Summary: Researchers have successfully developed a fiber WOLED with comparable performance to conventional planar WOLEDs, which can be implemented on fibers. This achievement is significant for the realization of complete textile display technologies.
Article
Engineering, Electrical & Electronic
Yong Ha Hwang, Seong Uk Kong, Chan Young Kim, Junwoo Lee, Ha-Eun Cho, So Yeong Jeong, Kyung Cheol Choi
Summary: Smart displays, including wearable textile displays, have become an integral part of our daily lives, providing new ways for human interaction and collaboration. Among these displays, OLEDs have gained attention for their high performance and flexibility, making them a promising candidate for truly wearable textile displays.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2022)
Article
Chemistry, Multidisciplinary
Seungyeop Choi, Yongmin Jeon, Jeong Hyun Kwon, Chunhwa Ihm, Seung Yeon Kim, Kyung Cheol Choi
Summary: A textile-based wearable OLED platform for neonatal jaundice phototherapy is proposed in this study. The platform is soft and flexible, conforming to the curvature of the human body, and shows suitable performance for jaundice treatment, even at low voltage.
Article
Chemistry, Multidisciplinary
Shin Hyung Lee, Dongjae Baek, Whibeom Cho, Nohyun Lee, Kwangjin Kim, Jae-Hun Kim, Han-Jun Kim, Hyeon Ho Kim, Hyo Jin Kim, Seungwoo Lee, Sung-Min Lee
Summary: A new type of multi-junction LSC photovoltaic system is developed in this study, which successfully improves the power conversion efficiency of the module through transfer printing and design of luminescent waveguide arrays. The experimental results show that the optimal LSC configuration increases the efficiency of the flexible module by about 0.55%, indicating the significant potential of this approach for practical applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Junwoo Lee, Seungyeop Choi, Tae-Woo Lee, Yong Ha Hwang, Yongjin Park, So Yeong Jeong, Kyung Cheol Choi
Summary: Textile-based displays have attracted significant attention recently as a platform for wearable displays. This study focuses on improving the aesthetic elements of textile displays by designing transparent OLEDs and proposing a new method and equation for analyzing the clarity of printed images on textile substrates.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
So Yeong Jeong, Yongmin Jeon, Eunji Kim, Gibok Lee, Yeon-Wha Oh, Chi Won Ahn, Eun Hae Cho, Yonghee Lee, Kyung Cheol Choi
Summary: Flexible see-through displays, using MXene material as electrodes, have been developed for various applications, offering improved information flow, safety, situational awareness, and overall user experience. The ultraflexible and environmentally stable MXene-based OLED display can stably operate in air condition for over 2000 h, endure repetitive bending deformation, and maintain environmental stability when exposed to wet surroundings. A matrix-addressable transparent OLED display was also demonstrated that could display letters and shapes.
Article
Energy & Fuels
Maga Baek, Jaeseong Yoo, Yunjung Kim, Yong-Jin Jang, Hyungeun Seo, Sung-Min Lee, Hearin Jo, Sang-Gil Woo, Jae-Hun Kim
Summary: A surface modification method was proposed to improve the performance of porous polyethylene (PE) polymer film as separators in Li-ion batteries (LIBs) by introducing a carbonyl group (C=O) and an imine functional group (R-N=C) onto the surface through nucleophilic addition of amine in a solution. The surface-modified PE separator exhibited enhanced wettability and thermal stability, resulting in increased ionic conductivity of the electrolyte and rate capability of the cells without any negative effect on the physical and electrochemical properties of the separator.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Seong Uk Kong, Yongmin Jeon, Ho Seung Lee, Yong Ha Hwang, Jaehyeock Chang, Hagseon Kim, Chan Young Kim, Kyung Cheol Choi
Summary: This paper presents a novel monorail-structure fiber-based organic light-emitting diode (MFOLED) with enhanced operating reliability. The MFOLED exhibits outstanding performance in terms of operating lifetime, luminance, and current efficiency, surpassing the highest performances reported till date. The feasibility of implementing fiber-based subpixels is confirmed, paving the way for truly wearable displays.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Whibeom Cho, Shin Hyung Lee, Woonhae Go, Sung-Min Lee
Summary: This study presents a method to enhance the performance of see-through flexible ultrathin silicon microcell modules by using visibily transparent but near-infrared-manipulatable optical backplanes, such as a luminescent waveguide gathering near-infrared photons and a backside reflector mitigating near-infrared photon escape. The integration of these near-infrared backplanes provides more photovoltaic gains to silicon solar modules than the sum of each backplane capability, resulting in up to approximately 40% boosted output power generation for the experimental module with approximate to 3-mu m thick silicon solar microcells.
ADVANCED OPTICAL MATERIALS
(2023)
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
Engineering, Electrical & Electronic
Junhong Park, Chan Young Kim, Myeong Ji Kim, Seungyeop Choi, Yong Ha Hwang, Kyung Cheol Choi
Summary: To implement wearable textile displays, it is important to maintain the unique properties of textiles while achieving high resolution and high frame-rate displays. This study optimized and applied transparent and flexible electrodes, as well as used vacuum deposition and oxide-based materials for thin film transistors (TFTs). Textile-based TFTs showed good electrical performance, transparency, and flexibility, even in low temperature processes. Furthermore, they demonstrated stable driving capabilities for organic light-emitting diodes on textile.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ho Seung Lee, Byeongju Noh, Seong Uk Kong, Yong Ha Hwang, Ha-Eun Cho, Yongmin Jeon, Kyung Cheol Choi
Summary: The increasing demand for real-time healthcare monitoring is driving the development of thin and flexible optoelectronic wearable pulse oximetry devices. Previous studies using OLEDs did not consider the side effects of broad FWHM characteristics and single substrates. This study introduces a fiber-based quantum-dot pulse oximetry system with a narrow FWHM of about 30nm, which enables accurate SpO2 measurements through multi-layer structures and human skin tissues. The FQPO showed improved photoplethysmogram signal sensitivity without waveguide-mode noise signal, offering potential for all-in-one clothing-type pulse oximetry.
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Sangmin Lee, Yongmin Jeon, Seung Jin Oh, Sun-Woo Lee, Kyung Cheol Choi, Taek-Soo Kim, Jeong Hyun Kwon
Summary: This study investigates the mechanical properties and water-vapor transmission rate (WVTR) of environmentally degraded ALD Al2O3 films under varied temperature and relative humidity. The degraded films experienced surface and pinhole-concentrated degradation, resulting in increased WVTR and reduced elongation. To improve the environmental stability, a silane-based inorganic-organic hybrid layer was introduced onto the Al2O3 films. The silamer successfully formed a strong and continuous aluminate phase, preserving the film's characteristics and providing environmental stability for applications in wearable organic devices.
MATERIALS HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Seung Jin Oh, Sangmin Lee, Kyung Cheol Choi, Jeong Hyun Kwon, Taek-Soo Kim
Summary: The mechanical behavior of ITO-based electrodes has been a significant challenge for the development of transparent and flexible electronics. In this study, the mechanical properties of ITO/Ag/ITO thin films were investigated through a free-standing tensile testing method. The results showed that the films with a 12-14 nm Ag interlayer exhibited superior mechanical robustness, providing valuable insights for the development of flexible electronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Electrical & Electronic
Junhong Park, Chan Young Kim, Myeong Ji Kim, Seungyeop Choi, Yong Ha Hwang, Kyung Cheol Choi
Summary: To implement wearable textile displays, it is important to maintain the unique properties of textiles, such as physical and chemical properties, aesthetics, and flexibility, while achieving high resolution and high frame-rate displays. Thin film transistors (TFTs) with excellent electrical properties were used for this purpose, with all layers formed by vacuum deposition and oxide-based transparent materials. A transparent and flexible electrode with an optimized structure was applied to the source/drain and gate. The textile-based TFTs showed good electrical performance, transparency, and flexibility, even after bending tests and low temperature processing.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
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)
