A5013407958- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Semiconductor materials and interfaces
- Advanced Sensor and Energy Harvesting Materials
- Synthesis and properties of polymers
- solar cell performance optimization
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Nanowire Synthesis and Applications
- Fullerene Chemistry and Applications
- Silicon and Solar Cell Technologies
- Advanced Photocatalysis Techniques
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Organic Chemistry Cycloaddition Reactions
- Cancer, Hypoxia, and Metabolism
- Nanomaterials for catalytic reactions
- Korean Peninsula Historical and Political Studies
- High Altitude and Hypoxia
- Covalent Organic Framework Applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Per- and polyfluoroalkyl substances research
- Algal biology and biofuel production
Agency for Defense Development
2021-2025
Ulsan National Institute of Science and Technology
2013-2022
Government of the Republic of Korea
2020-2022
Ewha Womans University Medical Center
2020
Ulsan College
2016
Hallym University
1986
A record breaking PCE of 12.1% is achieved by incorporating 25 wt% DR3TSBDT into a PTB7-Th:PC<sub>71</sub>BM host matrix.
Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored PEC water-splitting because stability in water. Herein, we report high-performance stable organic-semiconductors photoanodes consisting p-type polymers n-type non-fullerene materials, which is passivated...
Based on the integrated consideration and engineering of both conjugated backbones flexible side chains, solution‐processable polymeric semiconductors consisting a diketopyrrolopyrrole (DPP) backbone finely modulated branching chain ( ε ‐branched chain) are reported. The subtle change in point from alters π−π stacking lamellar distances between polymer backbones, which has significant influence charge‐transport properties turn performances field‐effect transistors (FETs). In addition to...
The introduction of fluorine (F) atoms onto conjugated polymer backbone has verified to be an effective way enhance the overall performance polymer-based bulk-heterojunction (BHJ) solar cells, but underlying working principles are not yet fully uncovered. As our attempt further understand impact F, herein we have reported two novel fluorinated analogues PCDTBT, namely, PCDTFBT (1F) and PCDT2FBT (2F), through inclusion either one or F into benzothiadiazole (BT) unit characterization their...
The enhanced SMA order ranges in well-intermixed 3-D textures enabled an ultrafast Channel II process, affording a highest efficiency of 12.01%.
For a given π-conjugated polymer, the batch-to-batch variations in molecular weight (M
Abstract A series of PBDB‐TT n random donor copolymers is synthesized, consisting an electron‐deficient benzo[1,2‐ c :4,5‐ ′]dithiophene‐4,8‐dione (BDD) unit and different ratios two electron‐rich benzo[1,2‐b:4,5‐ b ′]dithiophene (BDT) thieno[3,2‐ ]thiophene (TT) units, with intention to modulate the intrachain and/or interchain interactions ultimately bulk‐heterojunction morphology evolution. comparative study using 4 × 2 polymer solar cell (PSC) performance maps each [6,6]‐phenyl‐C 71...
Abstract Considering the special functions of fused‐ring aromatic building blocks and Si‐atom in high‐performance donor–acceptor‐conjugated materials at same time, herein synthesis a novel tricyclic heterocycle, triisopropylsilyl‐substituted benzo[1,2‐ b :4,5‐ c ′]dithiophene‐4,8‐dione ( i BDD‐Si), an isomer well‐known is presented. The BDD‐Si‐based copolymer series (PM6, PM6‐5Si, PM6‐10Si, PM6‐15Si) synthesized via Stille polymerization, revealing fine‐tuned optical electrochemical...
Benzothiadiazole-based solid additives have been designed as morphology controllers leading to enhanced power conversion efficiency and reduced device-to-device variations in small- large-areas single cells.
Over the past few years, one of most remarkable advances in field polymer solar cells (PSCs) has been development fluorinated 2,1,3-benzothiadiazole (BT)-based polymers that lack solid working principles previous designs, but boost power conversion efficiency. To assess a rich data set for influence BT units on charge-transport characteristics organic field-effect transistors (OFETs), we synthesized two new (PDPP-FBT and PDPP-2FBT) incorporating diketopyrrolopyrrole (DPP) either single- or...
Developing semiconducting polymers that exhibit both strong charge transport capability via highly ordered structures and good processability in environmentally benign solvents remains a challenge. Given furan-based materials have better solubility various than analogous thiophene-based materials, we synthesized characterized furanyl-diketopyrrolopyrrole polymer (PFDPPTT-Si) together with its thienyl-diketopyrrolopyrrole-based analogue (PTDPPTT-Si) to understand subtle changes induced by the...
It is known that grafting one polymer onto another backbone a powerful strategy capable of combining dual benefits from each parent polymer. Thus amphiphilic graft copolymer precursors (poly(vinylidene difluoride)‐ ‐poly( tert ‐butylacrylate) (PVDF‐ g ‐PtBA)) have been developed via atom transfer radical polymerization, and demonstrated its outstanding properties as promising binder for high‐performance lithium‐ion battery (LIB) by using in situ pyrolytic transformation PtBA to poly(acrylic...
Abstract A growing number of recent studies have demonstrated the substantial impact alkyl side chains on device performance organic semiconductors. However, detailed investigation effect side‐chain engineering blend morphology and ternary solar cells (OSCs) has not yet been undertaken. In this study, OSCs is investigated in a given poly(4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐ b ;4,5‐ ′]dithiophene‐2,6‐diyl‐ alt ‐(4‐(2‐ethylhexyl)‐3‐fluorothieno[3,4‐...
Two solid additives, BDT-1 and BDT-2, in non-fullerene polymer solar cells enhance photovoltaic efficiencies up to 16.26% with improved thermal photoinduced stabilities.
Abstract To understand the effects rendered on relevant basic physical properties and device function by controlling regiochemistry of cyclopenta[1,2‐b:5,4‐b′]dithiophene‐fluorobenzo[c][1,2,5]thiadiazole polymer (hereafter referred to as CDT‐FBT polymer), two polymers, regiorandom (RA) regioregular version (RR), respectively, are synthesized characterized. In addition, an efficient route for synthesizing a key monomer RR using various synthesis scope optimizing reaction conditions is...
The novel constitutional isomeric acceptors (<italic>o</italic>-F-ITIC and <italic>m</italic>-F-ITIC) are developed they show the huge disparity of intermolecular interactions and/or arrangements with donor polymer leading a significant variation in PCE OSCs.
Furan-flanked diketopyrrolopyrrole-based chalcogenophene copolymers are synthesized for the comprehensive study of heterocyclic effect in organic field-effect transistors.
A family of the SM-axis series based on benzo[1,2-b:4,5-b']dithiophene and 3-ethylrhodanine (RD) units with structurally different π-conjugation systems are synthesized as a means to understand structure-property relationship conjugated pathways in ternary non-fullerene organic solar cells (NF-OSCs) third component. The optical electrochemical properties highly sensitive both functionalized direction number RD groups. Enhanced power conversion efficiencies (PCEs) over 11% devices...