Article
Chemistry, Multidisciplinary
Ryo Yonemoto, Rieko Ueda, Akira Otomo, Yutaka Noguchi
Summary: In a light-emitting electrochemical cell (LEC), electrochemical doping facilitates charge injection and recombination emissions, resulting in high electroluminescence (EL) intensity at low driving voltages. In this study, a nanogap LEC (nano-LEC) consisting of a light-emitting polymer (F8BT) and an ionic liquid on a gold nanogap electrode was developed. The device demonstrated high EL intensity and a low threshold voltage at 300K. At low temperatures (<285K), the delayed components of the current and EL were strongly suppressed, indicating the nano-LEC as a promising approach for molecular-scale current-induced light sources.
Article
Multidisciplinary Sciences
Kosuke Yasuji, Tomo Sakanoue, Fumihiro Yonekawa, Katsuichi Kanemoto
Summary: The recombination between electrons and holes in electroluminescence processes has never been directly evaluated. In this study, the operation dynamics of light-emitting electrochemical cells were visualized with spectroscopic techniques, leading to a rapid device evaluation.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Lorenzo Mardegan, Chris Dreessen, Michele Sessolo, Daniel Tordera, Henk J. Bolink
Summary: The study investigated the use of a hyperbranched polymer blended with a Li salt as an electrolyte in PLECs, achieving excellent electroluminescent properties with high stability, long lifetime, peak efficiency, and short turn-on times. Additionally, the study examined the stability of the devices through measuring the photoluminescence during electroluminescent operation, showing quenching and immediate recovery of photoluminescence in vertically stacked devices.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Optics
Wei-Shiuan Tseng, Chi-Sheng Hsieh, Ming-Che Chan, Hai-Ching Su
Summary: This study proposes an optical approach to investigate the ion profile of organic films in light-emitting electrochemical cells (LECs) without invasive sputtering processes. By using a position sensitive detector-based nanoscale confocal microscope, ion distribution profiles were successfully acquired. This technique opens up a new avenue for future investigations of ion distributions without damaging the materials or disturbing the device operation.
Article
Chemistry, Multidisciplinary
Matthias Diethelm, Andrius Devizis, Wei-Hsu Hu, Tao Zhang, Roman Furrer, Camilla Vael, Sandra Jenatsch, Frank Nueesch, Roland Hany
Summary: The study identified that charge traps in semiconducting polymers present important intrinsic performance limitations for PLECs, similar to those for PLEDs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Aditya Mishra, Stephen DiLuzio, Masoud Alahbakhshi, Austen C. Adams, Melanie H. Bowler, Jiyoung Moon, Qing Gu, Anvar A. Zakhidov, Stefan Bernhard, Jason D. Slinker
Summary: By utilizing a CsPbBr3 perovskite host and a novel ionic iridium complex guest, along with a polyelectrolyte, efficient light-emitting electrochemical cells (PeLECs) with significantly improved performance and enhanced luminance efficiency were achieved in this study.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shiyu Hu, Hung-Wei Yeh, Jun Gao
Summary: Polymer light-emitting electrochemical cells (PLECs) using silver trifluoromethanesulfonate (Ag triflate) salt exhibit high luminance and efficiency, activating over 100 times faster than other optimized cells. The high performance is attributed to the partial chemical doping of the light-emitting polymer by silver cations, providing a new approach for designing high-performance mixed conductor devices.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Lorenzo Mardegan, Abhyuday Paliwal, Kassio P. S. Zanoni, Daniel Tordera, Henk J. Bolink
Summary: In this study, a transparent single layer light-emitting electrochemical cell (LEC) based on ionic transition metal complexes was successfully fabricated. The device showed high transparency, high luminance, and long lifetime, making it one of the highest performing single layer transparent electroluminescent devices.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Analytical
Fangxin Du, Zhiyong Dong, Yiran Guan, Abdallah M. Zeid, Di Ma, Jiachun Feng, Di Yang, Guobao Xu
Summary: A novel single-electrode electrochemical system (SEES) was developed for visual and high-throughput ECL immunoassay. The SEES combines a plastic sticker and carbon ink screen-printed electrode, offering simplicity, cost-effectiveness, and user-friendliness. Using a smartphone as the detector, the SEES enables the determination of the concentration range of a specific biomarker, cTnI, with a low detection limit. Compared to conventional electrode systems, the SEES shows superior advantages and holds great potential in point-of-care testing.
ANALYTICAL CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Serpil Tekoglu, Martin Held, Markus Bender, Guan Ni Yeo, Andreas Kretzschmar, Manuel Hamburger, Jan Freudenberg, Sebastian Beck, Uwe H. F. Bunz, Gerardo Hernandez-Sosa
Summary: The study introduces DNA-CTMA as an ion-solvating component in solid polymer electrolytes for the fabrication of light-emitting electrochemical cells, demonstrating stable device performance and optimized efficiency. The research highlights the versatility and potential application of DNA-CTMA in LEC technology.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Multidisciplinary Sciences
Gunel Huseynova, Joan Rafols-Ribe, Etienne Auroux, Ping Huang, Shi Tang, Christian Larsen, Ludvig Edman
Summary: The initial operation of a light-emitting electrochemical cell (LEC) involves the in-situ formation of a p-n junction doping structure in the active material through electrochemical doping. The position of the emissive p-n junction in the interelectrode gap has a significant impact on the LEC performance, and strategies for controlling its position are highly desired. In this study, a chemical pre-doping approach was introduced to shift the p-n junction towards the positive anode, resulting in improved emission efficiency and stability of the LEC device.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Joan Rafols-Ribe, Xiaoying Zhang, Christian Larsen, Petter Lundberg, E. Mattias Lindh, Cuc Thu Mai, Jonas Mindemark, Eduardo Gracia-Espino, Ludvig Edman
Summary: This study demonstrates that the position of the emission zone in a light-emitting electrochemical cell can be effectively controlled by the inclusion of an appropriate additive in the active material. By modifying the end group of a neutral compound, the emission zone can be shifted from near the anode to the center of the active material, resulting in a 60% improvement in power efficiency. The important conclusion is that the emission zone position and the performance of the cell can be controlled by easily tuning the additive in the active material.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Abhishake Goyal, Dongze Wang, Jun Gao
Summary: This study demonstrates planar polymer light-emitting electrochemical cells (LECs) with concentric circle electrodes. By varying the inner electrode radius from 1 to 3 mm with a fixed outer electrode radius of 6.8 mm, all cells can be activated at 360 K with a 40 V bias. The large electrode gap size allows for time-lapsed imaging of the in situ electrochemical p- and n-doping processes, and the concentric circular electrode configuration offers a cross sectional view of an LEC-based light-emitting fiber. Furthermore, the sensitivity of junction position to relative electrode radius indicates the strong coupling of p- and n-doping reactions.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Abdelaziz Jouaiti, Lavinia Ballerini, Hsiang-Ling Shen, Ronan Viel, Federico Polo, Nathalie Kyritsakas, Stefan Haacke, Yu-Ting Huang, Chin-Wei Lu, Christophe Gourlaouen, Hai-Ching Su, Matteo Mauro
Summary: This study presents two binuclear heteroleptic Cu-I complexes with rigid chelating diphosphines and pi-conjugated 2,5-di(pyridin-2-yl)thiazolo[5,4-d]thiazole ligands. The complexes exhibit a large bathochromic shift of emission, allowing luminescence in the near-infrared (NIR) region. Photophysical and computational investigations confirm the radiative process and structural analysis reveals a unique doubly locked structure. These complexes are successfully used in NIR light-emitting electrochemical cells (LECs) and show potential for white-emitting LECs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Joan Rafols-Ribe, Eduardo Gracia-Espino, Sandra Jenatsch, Petter Lundberg, Andreas Sandstrom, Shi Tang, Christian Larsen, Ludvig Edman
Summary: This study compared the performance of OLEDs and LECs under varying device temperatures and found that the temperature dependency differs between the two devices, with LECs being more affected by temperature changes. The deviation in behavior is attributed to the stronger positive temperature dependence of hole mobility compared to electrons in both OLEDs and LECs, leading to a shift in the emission zone towards the center of the active material.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Physical
Shiyu Hu, Xu Chi, Shulun Chen, Faleh AlTal, Jun Gao
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Chemistry, Physical
Shiyu Hu, Jun Gao
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Optics
Xueshan Han, Jianqi Shen, Pengteng Yin, Shiyu Hu, Duo Bi
OPTICS COMMUNICATIONS
(2014)
Article
Materials Science, Multidisciplinary
Shiyu Hu, Jun Gao
ADVANCED MATERIALS TECHNOLOGIES
(2018)
Article
Nanoscience & Nanotechnology
Shiyu Hu, Jun Gao
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Shiyu Hu, Jun Gao
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Electrochemistry
Shiyu Hu, Jun Gao
Article
Nanoscience & Nanotechnology
Kiran Birdee, Shiyu Hu, Jun Gao
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Dongze Wang, Shiyu Hu, Jun Gao
Summary: Semiconductor junctions play a crucial role in modern technology. The solid polymer light-emitting electrochemical cell (PLEC) features a homojunction that can be partially de-doped into a p-i-n structure through controlled heating/cooling cycles. The authors observed phenomena like bright reverse bias electroluminescence and hypersensitivity to temperature in the frozen polymer p-i-n junction, which can be explained by a model based on tunnel injection of charge carriers.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shiyu Hu, Shoude Chang, Gaozhi Xiao, Jianping Lu, Jun Gao, Yanguang Zhang, Ye Tao
Summary: A new type of stretchable triboelectric nanogenerator (TENG) was reported in this study, which can effectively operate in both pressing and stretching modes due to its unique structural design. The TENG shows different output voltages, current densities, and power densities in different modes. The excellent electrical properties of the stretchable conductive composite make TENG resilient against mechanical deformation, demonstrating versatile applications in energy harvesting and sensing.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Shiyu Hu, John Weber, Shoude Chang, Gaozhi Xiao, Jianping Lu, Jun Gao, Weihong Jiang, Yanguang Zhang, Ye Tao
Summary: A new sliding triboelectric nanogenerator (TENG) has been developed, which is easy to fabricate and low cost. It can directly power LEDs, sustainably power small wearable and portable electronics, and harvest energy from tensile motion associated with human activities.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Shiyu Hu, Hung-Wei Yeh, Jun Gao
Summary: Polymer light-emitting electrochemical cells (PLECs) using silver trifluoromethanesulfonate (Ag triflate) salt exhibit high luminance and efficiency, activating over 100 times faster than other optimized cells. The high performance is attributed to the partial chemical doping of the light-emitting polymer by silver cations, providing a new approach for designing high-performance mixed conductor devices.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Nanoscience & Nanotechnology
Jun Gao, Shulun Chen, Faleh AlTal, Shiyu Hu, Laurent Bouffier, Guillaume Wantz
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
