A5091794377- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Advanced Sensor and Energy Harvesting Materials
- Thin-Film Transistor Technologies
- Synthesis and properties of polymers
- Analytical Chemistry and Sensors
- Marine Biology and Environmental Chemistry
- Advanced Thermoelectric Materials and Devices
- X-ray Diffraction in Crystallography
- Transition Metal Oxide Nanomaterials
- Crystallization and Solubility Studies
- Thermal Radiation and Cooling Technologies
- Botulinum Toxin and Related Neurological Disorders
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Supercapacitor Materials and Fabrication
- Blood properties and coagulation
- Antimicrobial agents and applications
- Organic and Molecular Conductors Research
- Advanced Memory and Neural Computing
- Adhesion, Friction, and Surface Interactions
- Silicon and Solar Cell Technologies
- Semiconductor materials and interfaces
Korea Research Institute of Chemical Technology
2021-2025
Korea University of Science and Technology
2025
Pusan National University
2009-2024
Daejeon University
2021
Government of the Republic of Korea
2020
Numerous conjugated polymer-based electrochromic devices (ECDs) have been developed, but the correlation between electronic properties of polymers (ECPs) and their EC performance, especially response speeds, has rarely explored. In this work, we propose two new dithienopyran-based ECPs containing different heteroatoms with distinct characteristics to elucidate effect structure on performance. When electron-donating alkoxy groups are fused into (P(DT-P)), highest occupied molecular orbital...
Abstract Narrow bandgap non‐fullerene acceptors (NBG NFAs) are crucial in advancing near‐infrared organic photodetectors (NIR OPDs). However, the polymorphous behavior of NFAs introduces energetic disorder and charge‐trapping sites bulk heterojunction (BHJ) active layers, thereby hindering NIR performance OPDs. This study demonstrates design optimization molecular structures alkyl side chains to morphologically address these electrical limitations shed light on how affect...
Abstract Near‐infrared organic photodetectors (NIR OPDs) comprising ultra‐narrow bandgap non‐fullerene acceptors (NFA, over 1000 nm) typically exhibit high dark current density under applied reverse bias. Therefore, suppression of is crucial to achieve high‐performance such NIR OPDs. Herein, cyano (CN) with a strong electron‐withdrawing property introduced into alkoxy thiophene as π‐bridge adjust its optoelectronic characteristics, and the correlation between charge injection barrier...
Recently, the development of non-fullerene acceptors (NFAs) for near-infrared (NIR) organic photodetectors (OPDs) has attracted great interest due to their excellent NIR light absorption properties. Herein, we developed NFAs by substituting an electron-donating moiety (branched alkoxy thiophene (BAT)) asymmetrically (YOR1) and symmetrically (YOR2) Y6 framework. YOR1 exhibited nanoscale phase separation in a film blended with PTB7-Th. Moreover, BAT unit effectively extended wavelengths over...
The aggregation behavior of polymers plays a crucial role in determining the optical, electrical, and morphological properties donor–acceptor blends both all-polymer solar cells (all-PSCs) non-fullerene small-molecule acceptor–polymer (NFSMA–PSCs). However, direct comparison impacts on two different systems has not been reported, although it is important to design universal polymer donors (PD's). Herein, three PD's with side chains (P–EH, P–SEH, P–Si) are designed study PD effects blend...
In this study, we explore an innovative approach to enhancing the photovoltaic performance of organic solar cells through core fluorination non‐fullerene acceptor. We developed a benzotriazole‐based acceptor with trifluorinated phenyl side chain, referred as YNPF3, which has significant impact on molecular properties, including surprisingly varied local dipole moment and crystalline nature, well effectively stabilizing frontier orbital energy levels. Furthermore, trifluoro‐phenyl‐based...
Abstract Organic photodetectors (OPDs) based on non‐fullerene acceptors (NFAs) have received considerable attention because of their potential for use in various commercial applications as near‐infrared (NIR) light sensing platforms. However, recent OPDs suffer from low NIR photoresponse and large dark/noise currents with narrow bandgap organic photoactive materials. Herein, a π ‐bridge molecular engineering strategy replacing alkoxythienyl benzothiadiazole ultra‐narrow (ultra‐NBG) NFAs is...
Shellac, a natural polymer resin obtained from the secretions of lac bugs, was evaluated as dielectric layer in organic field-effect transistors (OFETs) on basis donor (D)-acceptor (A)-type conjugated semiconducting copolymers. The measured constant and breakdown field shellac were ∼3.4 3.0 MV/cm, respectively, comparable with those poly(4-vinylphenol) (PVP) film, commonly used material. Bottom-gate/top-contact OFETs fabricated or PVP one three different D-A-type copolymers active layer:...
The development of portable X‐ray detectors is necessary for diagnosing fractures in unconscious patients emergency situations. However, this quite challenging because the heavy weight scintillator and silicon photodetectors. thickness can be reduced by replacing layer with an organic This study presents a novel bithienopyrroledione‐based polymer donor that exhibits excellent photodetection properties even thick photoactive (~700 nm), owing to symmetric backbone highly soluble molecular...
Two polymer donors, PFBDT-8ttTPD and PClBDT-8ttTPD, consisting of halogenated thiophene-substituted benzo[1,2-b:4,5-b′]dithiophene alkyl-substituted thieno[3,2-b]thiophene linked thieno[3,4-c]pyrrole-4,6(5H)-dione, were designed synthesized for the evaluation photovoltaic performances. The fabricated IT-4F-based organic solar cells (OSCs) exhibited maximum power conversion efficiency (PCE) values 12.81 11.12% respectively. Furthermore, PFBDT-8ttTPD:Y6 showed significantly improved PCE...
The realization of printed organic solar cells (OSCs) as a commercial technology is dependent on the development high-performance photovoltaic materials suitable for large-scale device manufacture. In this study, design, synthesis, and characterization series A-D-A'-D-A-type molecular acceptors based indacenodithienothiophene (IDTT) thiophene-flanked 2,1,3-benzothiadiazole (DTBT) are reported. synthesized showed broader absorption ranges narrower band gap energies than those well-known...
Our work presents a strategy for the development of eco-compatible highly efficient organic solar cells with sufficient solubility and optimized aggregation by introducing an ester-substituted thiophene.
New low-temperature curable organic/inorganic hybrid polymers were designed and synthesized as gate dielectrics for organic thin-film transistors (OTFTs). Allyl alcohols introduced to polyhedral oligomeric silsesquioxane (POSS) via hydrosilyation produce an alcohol-functionalized POSS derivative (POSS-OH). POSS-OH was then reacted with hexamethoxymethylmelamine at carrying molar ratios 80 °C in the presence of a catalytic amount p-toluenesulfonic acid give highly cross-linked network...
A novel frictional drag reducing self-polishing copolymer (FDR-SPC) was first developed by the authors. The FDR-SPC is a special derivative of an SPC that designed to achieve skin reduction in turbulent water flow releasing polyethylene glycol (PEG) into through hydrolysis reaction. Thus, coating acts as continuous medium accommodating countless, molecular-level polymer injectors. However, direct evidence such PEG release has not yet been demonstrated. Here, we report results situ...
Abstract Organic thermoelectric generators (TEGs) are flexible and lightweight, but they often have high electrical resistance, poor output power, low mechanical durability, because of which their performance is poor. We used a facile rapid solvent evaporation process to prepare robust carbon nanotube/Bi 0.45 Sb 1.55 Te 3 (CNT/BST) foam with figure merit ( zT ). The BST sub‐micronparticles effectively create an electrically conductive network within the three‐dimensional porous CNT greatly...