A5056084254- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced Memory and Neural Computing
- Organic Light-Emitting Diodes Research
- Covalent Organic Framework Applications
- Luminescence and Fluorescent Materials
- Thin-Film Transistor Technologies
- Tactile and Sensory Interactions
- Nanowire Synthesis and Applications
- Advanced Materials and Mechanics
- Force Microscopy Techniques and Applications
- Silicon and Solar Cell Technologies
- Neuroscience and Neural Engineering
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Thermoelectric Materials and Devices
- Advanced Polymer Synthesis and Characterization
- Advanced battery technologies research
- Innovative Energy Harvesting Technologies
- Graphene research and applications
- Machine Learning in Materials Science
- 2D Materials and Applications
- IoT-based Smart Home Systems
- Inorganic and Organometallic Chemistry
Pohang University of Science and Technology
2021-2025
Ulsan National Institute of Science and Technology
2022
King Abdullah University of Science and Technology
2022
Sungkyunkwan University
2022
Abstract For organic solar cells to be competitive, the light-absorbing molecules should simultaneously satisfy multiple key requirements, including weak-absorption charge transfer state, high dielectric constant, suitable surface energy, proper crystallinity, etc. However, systematic design rule in achieve abovementioned goals is rarely studied. In this work, guided by theoretical calculation, we present a rational of non-fullerene acceptor o-BTP-eC9, with distinct photoelectric properties...
A sweat sensor is expected to be the most appropriate wearable device for noninvasive healthcare monitoring. However, practical use of sensors impeded by irregular and low secretion rates. Here, a sweat-collecting patch that can collect efficiently fast continuous monitoring demonstrated. The uses cactus-spine-inspired wedge-shaped wettability-patterned channels on hierarchical microstructured/nanostructured surface. channel shape, in combination with superhydrophobic/superhydrophilic...
Abstract The halogenated volatile solid additives can delicately optimize the active layer morphology of organic solar cells, improving devices' performance, stability, and reproducibility. However, what type intermolecular interaction occurs between whether truly impacts donor or acceptor remains debatable. Herein, focus is on with conjugated benzene rings their influence composed PM6:Y6 as they evaporated. absorbance spectra exhibit apparent red‐shift features in Y6 absorption regions,...
Polymorphism of nonfullerene acceptors enhances electron transport properties and potentially impacts the performance organic electronic devices.
Abstract The pressing demand for sustainable energy storage solutions has spurred the burgeoning development of aqueous zinc batteries. However, kinetics-sluggish Zn 2+ as dominant charge carriers in cathodes leads to suboptimal charge-storage capacity and durability Here, we discover that an ultrathin two-dimensional polyimine membrane, featured by dual ion-transport nanochannels rich proton-conduction groups, facilitates rapid selective proton passing. Subsequently, a distinctive...
Neuromorphic Computing In article number 2400319, Wonho Lee, and Eunho co-workers introduce a strategy to modulate the non-volatile properties of organic synaptic devices by controlling ion transport in conjugated copolymers. The findings highlight chain length crystalline orientation effects, enabling advanced neuromorphic device design.
With the emergence of polymer acceptors with BTP cores and their derivatives, all-polymer solar cells (all-PSCs) have achieved remarkable progress in achieving power conversion efficiencies (PCE). However, compared the...
Single junction binary all-small-molecule (ASM) organic solar cells (OSCs) with power conversion efficiency (PCE) beyond 14% are achieved by using non-fullerene acceptor Y6 as the electron acceptor, but still lag behind that of polymer OSCs. Herein, an asymmetric Y6-like BTP-FCl-FCl, is designed and synthesized to match recently reported high performance small molecule donor BTR-Cl, a record 15.3% for single-junction ASM OSCs achieved. BTP-FCl-FCl features F,Cl disubstitution on same end...
Wearable auditory sensors are critical in user-friendly sound-recognition systems for smart human-machine interaction and the Internet of Things. However, previously reported wearable have limited sound-sensing quality as a consequence poor frequency response narrow acoustic-pressure range. Here, skin-attachable acoustic sensor is presented that has higher sensing accuracy wider field than human ears, with flat (15-10 000 Hz) good range linearity (29-134 dBSPL ) well high conformality to...
A thiazole-functionalized terpolymer donor enables 18.4% efficiency polymer solar cells.
The performance of organic solar cells has been dramatically enhanced due to the use bulk heterojunction active layer structure. However, blending donor and acceptor in volume results a large extent bimolecular charge recombination increasing energetic disorder. Herein, we fabricated with polymer PM6 nonfullerene N3 bilayer structure investigate impact planar configurations on landscapes. We find superior crystallinity features composed pure layers. disorder are effectively suppressed...
The sequential deposition method assists the vertical phase distribution in photoactive layer of organic solar cells, enhancing power conversion efficiencies. With this film coating approach, morphology both layers can be fine-tuned with high boiling solvent additives, as frequently applied one-step casting films. However, introducing liquid additives compromise morphological stability devices due to residuals. Herein, 1,3,5-tribromobenzene (TBB) volatility and low cost, is used a solid...
Abstract 3D displays are of great interest as next‐generation by providing intensified realism visual information and haptic perception. However, challenges lie in implementing due to the limitation conventional display manufacturing technologies that restrict dimensional scaling their forms beyond 2D layout. Furthermore, on account inherent static mechanical properties constituent materials, current form factors can hardly achieve robust complex structures, thereby hindering diversity...
Abstract Anode interlayers play critical roles in organic solar cells, impacting the electrode's work function, energy level alignment, hole extraction, and electrode surfaces. However, development of commonly used anode interlayer PEDOT:PSS lags behind rapid cells due to its low conductivity, acidity, poor electron‐blocking capabilities. Herein, an innovative strategy is proposed regulate intrinsic properties by incorporating molybdenum‐containing semiconductors (MoO 3 , MoS 2 ), which...
Interest has grown in services that consume a significant amount of energy, such as large language models (LLMs), and research is being conducted worldwide on synaptic devices for neuromorphic hardware. However, various complex processes are problematic the implementation properties. Here, characteristics implemented through novel method, namely side chain control conjugated polymers. The developed exhibit biological brain, especially spike-timing-dependent plasticity (STDP), high-pass...
Auditory sensors have shortcomings with respect to not only personalization wearability and portability but also detecting a human voice clearly in noisy environment or when mask covers the mouth. In this work, an electret-powered hole-patterned polymer diaphragm is exploited into skin-attachable auditory sensor. The optimized charged electret induces voltage bias of >400 V against counter electrode, which reduces necessity bulky power source enables capacitive sensor show high sensitivity...
Abstract To impart high stretchability to semiconducting polymers, researchers have used a photocrosslinking approach based on the nitrene chemistry of an azide‐incorporated molecular additive. However, understanding design azide crosslinkers with respect their effects electrical and mechanical properties polymer thin films is lacking. In this study, photocrosslinker's length structure microstructural, features, photocrosslinked conjugated investigated. For systematic comparison, series...
Abstract Additive‐assisted donor and acceptor domain regulation is regarded as an effective strategy to further release the potential photovoltaic performance of existing organic solar cells (OSCs). Meanwhile, it also critical find high‐efficient, stable, non‐toxic, low‐cost biological materials bio‐additives replace traditional toxic halogen‐based additives. In this study, derived from a natural chlorophyll pigment named ZnChl H 2 Chl are employed optimize morphology molecular stack PM6:Y6...
Perovskite solar cells (PSCs) with superior performance have been recognized as a potential candidate in photovoltaic technologies. However, defects the active perovskite layer induce nonradiative recombination which restricts and stability of PSCs. The construction thiophene-based 2D structure is one significant approaches for surface passivation hybrid PSCs that may combine benefits high three-dimensional (3D) perovskite. Here, sulfur-rich spacer cation 2-thiopheneethylamine iodide (TEAI)...
With the continuous development of organic semiconductor materials and on-going improvement device technology, power conversion efficiencies (PCEs) solar cells (OSCs) have surpassed threshold 19%. Now, low production cost photovoltaic devices become an imperative demand for its practical application future commercialization. Herein, feasibility simplified synthesis cost-effective small-molecule acceptors via end-cap isomeric engineering is demonstrated, two constitutional isomers, BTP-m-4Cl...
When used in organic solar cells, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) aligns interfacial energy levels, promotes hole extraction, blocks electrons, and optimizes the active layer's morphology. However, with an optimal thickness of approximately 30–40 nm, PEDOT:PSS has insufficient layer tolerance, owing to its low conductivity extraction property. Herein, a hole-selective-molecule doping strategy is proposed enhance properties by introducing MPA2FPh-BT-BA...
The ionization energy (IE) offset of a donor–acceptor pair provides the driving force for hole transfer and subsequent free charge carrier generation in low‐bandgap nonfullerene organic solar cells (OSCs). However, interfacial energetic landscape bulk heterojunction OSCs is determined by materials’ electronic structure intermolecular interactions at donor/acceptor interface, causing local energy‐level shifts disorder. Herein, impact IE on efficiency dynamics systematically evaluated...
Organic thin-film transistors (OTFTs) with ideal behavior are highly desired, because nonideal devices may overestimate the intrinsic property and yield inferior performance in applications. In reality, most polymer OTFTs reported literature do not exhibit characteristics. Supported by a structure-property relationship study of several low-disorder conjugated polymers, here, we present an empirical selection rule for candidates textbook-like high reliability factors (100% transistors). The...