A5057766320- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Organic Light-Emitting Diodes Research
- Semiconductor materials and interfaces
- TiO2 Photocatalysis and Solar Cells
- Thin-Film Transistor Technologies
- ZnO doping and properties
- Fullerene Chemistry and Applications
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Chalcogenide Semiconductor Thin Films
- Silicon and Solar Cell Technologies
- Synthesis and properties of polymers
- Copper-based nanomaterials and applications
- Nanowire Synthesis and Applications
- Membrane Separation and Gas Transport
- Nanomaterials for catalytic reactions
- Catalytic Processes in Materials Science
- Electrochemical sensors and biosensors
- Transition Metal Oxide Nanomaterials
- Enzyme Catalysis and Immobilization
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
Korea Research Institute of Chemical Technology
2012-2021
Korea University of Science and Technology
2014-2021
Daejeon University
2014-2019
Government of the Republic of Korea
2014-2019
Materials and Energy Research Center
2019
Materials Research Center
2019
Center for Solar Energy Research and Studies
2017
Convergence
2016
Korea Institute of Industrial Technology
2015
Kongju National University
2015
Nanostructured photocatalysts with high activity are sought for solar production of hydrogen. Spinel semiconductors different nanostructures and morphologies have immense importance photocatalytic other potential applications. Here, a chemically stable cubic spinel nanostructured CdIn2S4 prepared by facile hydrothermal method is reported as visible-light driven photocatalyst. A pretty, marigold-like morphology observed in aqueous-mediated CdIn2S4, whereas nanotubes good crystallinity, 25 nm...
A systematic approach has been followed in the development of a high-efficiency hybrid photovoltaic device that combination poly(3-hexylthiophene) (P3HT), [6,6]-phenyl C61-butyric acid methyl ester (PCBM), and silver nanowires (Ag NWs) active layer using bulk heterojunction concept. The is modified by utilizing binary solvent system for blending. In addition, evaporation process after spin-coating changed an Ag NWs incorporated to improve performance device. Hybrid devices were fabricated...
A highly processable, new semiconducting polymer, PCDTTz, based on alternating thiazolothiazole and carbazole units was synthesized. The polymer exhibited a field-effect carrier mobility of up to 3.8 × 10(-3) cm(2) V(-1) s(-1) bulk heterojunction solar cells made from PCDTTz produced power conversion efficiency 4.88% under AM 1.5 G (100 mW cm(-2)) conditions.
Two small molecule acceptors, composed of carbazole or fluorene cores and rhodanine dye ends, were synthesized their high OPV performances up to 3.08% demonstrated.
A new series of wide band gap photovoltaic polymers based on a fluorinated phenylene-alkoxybenzothiadiazole unit with an optical over 1.90 eV are designed and utilized for high-performance single- multi-junction bulk heterojunction polymer solar cells.
We studied fullerene-free organic solar cells using rhodanine-terminated BDT3TR and O-IDTBR.
A series of novel thiophene- and selenophene-based low-bandgap polymers were synthesized using a Stille cross-coupling reaction; these contained quinoxaline diketopyrrolopyrrole as acceptors. Various acceptors introduced into the selenophene backbones, solubility, absorption spectra, energy levels, charge transport, blend film morphology, photovoltaic properties resulting investigated. The weight-averaged molecular weights (Mw) P3TDTQ, P3SDTQ, P3TDTDPP, P3SDTDPP found to be 12 300, 15 500,...
Two donor–acceptor (D–A) copolymers, based on the donor unit TIPS substituted benzodithiophene (TIPSBDT) and acceptor quinoxaline-based units with or without fluorine substitution (PTIPSBDT-DTQX PTIPSBDT-DFDTQX), were designed synthesized as a material for bulk-heterojunction (BHJ) photovoltaic cells. The introduction of F atoms high electron affinity to be quinoxailine moieties is effective in further lowering both HOMO LUMO energy levels PTIPSBDT-DFDTQX attain higher open-circuit voltage...
A series of carbazole-based D-π-A copolymers were synthesized to investigate the influences conjugation length and structural distortion on intramolecular charge transfer (CT) complexation between donor (D) acceptor (A) components. Carbazole presents two possible linkage sites, 2,7- 3,6-positions, which led significant differences in thermal, photophysical, electrochemical, electrical properties due positioning electron-rich nitrogen atom with respect copolymer backbone. The comprehensively...
Solution‐processed organic solar cells are promising owing to their light weight, ease of processability, low cost, flexibility, and large‐area fabrication. Particularly, small‐molecule active materials have been recently developed using straightforward synthesizing methods, exhibiting the least batch‐to‐batch variation in physical optoelectronic properties highly reproducible efficiency. A series 2D‐BDT‐based with various numbers benzodithiophene (BDT) units how number 2D‐BDT influences...
Abstract The room temperature (RT) processability of the photoactive layers in polymer solar cells (PSCs) from halogen‐free solvent along with their highly reproducible power conversion efficiencies (PCEs) and intrinsic thickness tolerance are extremely desirable for large‐area roll‐to‐roll (R2R) production. However, most materials PSCs require elevated processing temperatures due to strong aggregation, which unfavorable industrial R2R manufacturing PSCs. These limiting factors...
Wireless communication: Platinum nanoparticles (nPt) in an electrolyte enhance electron transfer from the electrode to NAD+ during indirect electrochemical regeneration of NADH (see picture). The intermediate nPt-Hads, formed at negative potential, helps turnover primary mediator M by donating a proton and kinetically favorable way. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z703632_s.pdf or author. Please note: publisher...
Solution-processable semiconducting copolymers, poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5′-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) and poly[4,8-bis(2-ethylhexyl-2-thenyl)-benzo[1,2-b:4,5-b′]dithiophene-alt-5,5′-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PBDTDTBT), their pyrene-containing terpolymers were synthesized using Suzuki or Stille coupling. Pyrene units introduced to improve the charge-transporting abilities of polymers. The resulting polymers found be...
A series of quinoxaline-based copolymers, namely, poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(5′,8′-di-2-thienylquinoxaline)] (P1), poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(5′,8′-di-2-thienyl-2,3-bis(4-octyloxyl)phenyl)quinoxaline] (P2), and poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(5′,8′-di-2-thienyl-2,3-bis(4-(3,7-dimethyloctyloxy)phenyl)quinoxaline] (P3), were synthesized characterized for use in polymer solar cells (PSCs). We describe the effect modifying alkyl group side...
A series of novel benzo[1,2-b:4,5-b′]dithiophene (BDT)-based conjugated polymers were synthesized using a Stille cross-coupling reaction. These contained dithienyl thieno[3,4-c]pyrrole-4,6-dione (DTTPD) as an acceptor. Alkylthienylenevinylene thiophene side groups introduced into the BDT units, and solubility, absorption spectra, energy levels, charge transport, blend film morphology, photovoltaic properties resulting polymer...
A novel naphtho[2,3-b:6,7-d′]dithiophene (NDT)-based copolymer, poly[4,9-bis(2-ethylhexyloxy)naphtho[2,3-b:6,7-d′]dithiophene-2,7-diyl-alt-1,3-(5-heptadecan-9-yl)-4H-thieno[3,4-c]pyrrole-4,6-dione] (P1), was synthesized and characterized for use in polymer solar cells. We systematically investigated the synthesis, thermal stability, optical electrochemical properties, field-effect carrier mobilities, photovoltaic characteristics of resulting polymer. The properties NDT-based were compared...
A series of small compound materials based on benzodithiophene (BDT) and diketopyrrolopyrrole (DPP) with three different alkyl side chains were synthesized used for organic photovoltaics. These compounds had branches (i.e., 2-ethylhexyl (EH), 2-butyloctyl (BO), 2-hexyldecyl (HD)) attached to DPP units. Thin films made these characterized their solar cell parameters measured in order systematically analyze influences the film microstructure, molecular packing, hence, charge-transport...
A series of new conjugated polymers based on the asymmetric benzo[1,2-b:4,5-b′]dithiophene (BDT) unit were designed and synthesized for use in bulk-heterojunction polymer solar cells. Each side chain BDT was tuned by introducing alkyl alkoxy groups. The best cell efficiency achieved an device 4-octyl-8-octyloxy-BDT (7.64% PCE), which performed better than devices symmetric dioctyl-BDT (6.48% PCE) or dioctyloxy-BDT (7.18% PCE). Further modification chains, replacing octyloxy with...
The reduction of charge carrier recombination and intrinsic defect density in organic–inorganic halide perovskite absorber materials is a prerequisite to achieving high-performance solar cells with good efficiency stability. Here, we fabricated inverted planar by incorporation small amount excess organic/inorganic (methylammonium iodide (CH3NH3I; MAI), formamidinium (CH(NH2)2I; FAI), cesium (CsI)) CH3NH3PbI3 film. Larger crystalline grains enhanced crystallinity films reduce the density,...