A5007492220- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- TiO2 Photocatalysis and Solar Cells
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced Photocatalysis Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Solid-state spectroscopy and crystallography
- Photonic Crystals and Applications
- Pickering emulsions and particle stabilization
- Copper-based nanomaterials and applications
- Nanomaterials and Printing Technologies
- Nanomaterials for catalytic reactions
- Nanocluster Synthesis and Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Photonic and Optical Devices
- Polymer Surface Interaction Studies
- Advanced Polymer Synthesis and Characterization
- Luminescence Properties of Advanced Materials
- Advanced battery technologies research
- MXene and MAX Phase Materials
- Biocrusts and Microbial Ecology
- Technostress in Professional Settings
Korea University
2010-2024
Catholic University of Korea
2012-2024
Seoul Institute
2017-2020
Government of the Republic of Korea
2014-2019
Korea Advanced Institute of Science and Technology
2002-2018
Samsung (South Korea)
2018
Indo Korea Science and Technology
2018
Korea Institute of Science and Technology
2018
Hanbat National University
2018
Seoul St. Mary's Hospital
2018
Chemically tuned inorganic–organic hybrid materials, based on CH3NH3(═MA)Pb(I1–xBrx)3 perovskites, have been studied using UV–vis absorption and X-ray diffraction patterns applied to nanostructured solar cells. The band gap engineering brought about by the chemical management of MAPb(I1–xBrx)3 perovskites can be controllably cover almost entire visible spectrum, enabling realization colorful We demonstrate highly efficient cells exhibiting 12.3% in a power conversion efficiency under...
Brighter perovskite LEDs Organic-inorganic hybrid perovskites such as methyl ammonium lead halides are attractive low-cost light-emitting diode (LED) emitters. This is because, unlike many inorganic nanomaterials, they have very high color purity. Cho et al. made two modifications to address the main drawback of these materials, their low luminescent efficiency. They created nanograin materials lacking free metallic lead, which helped confine excitons and avoid quenching. The had a current...
Bright organic/inorganic hybrid perov-skite light-emitting diodes (PrLEDs) are realized by using CH3 NH3 PbBr3 as an emitting layer and self-organized buffer hole-injection (Buf-HIL). The PrLEDs show high luminance, current efficiency, EQE of 417 cd m(-2) , 0.577 A(-1) 0.125%, respectively. Buf-HIL can facilitate hole injection into well block exciton quenching.
The inverted CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> planar hybrid solar cells exhibited better device efficiency and stability lower hysteresis than the normal cells.
Silver nanostructures are containers for surface plasmons − the collective oscillation of conduction electrons in phase with incident light. By controlling shape container, one can control ways which oscillate, and turn how nanostructure scatters light, absorbs enhances local electric fields. With a series discrete dipole approximation (DDA) calculations, each distinctive morphology, we illustrate tune optical properties silver nanostructures. Calculated predictions validated by experimental...
Abstract Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and simple processes required to produce them. However, frequent presence a pronounced hysteresis current voltage characteristic these devices arises concerns on intrinsic stability organo-metal halides, challenging reliability technology itself. Here, we show that n-doping mesoporous TiO 2 is accomplished by facile post treatment films lithium salts. We...
Organolead-halide-perovskite-based solar cells have recently received significant attention due to their excellent photovoltaic performance and low cost. The general formula of this perovskite light harvester is RPbX3, where R X stand for a monovalent organic cation halide anion, respectively. Structures the cell are designed based on function perovskite. Organolead perovskites can be used either as sensitizers or n- p-type harvesters. Rapid progress has been made over past year since first...
One lump or two! Selective etching of twinned seeds, mediated by HCl and the oxygen in air, resulted high yields perfect single-crystal silver nanocubes a range sizes (30–130 nm). The chloride ion enhances oxidation prevents aggregation, while proton decreases rate reduction facilitates through formation nitric acid.
We report all solid-state nanostructured inorganic−organic heterojunction solar cells fabricated by depositing Sb2S3 and poly(3-hexylthiophene) (P3HT) on the surface of a mesoporous TiO2 layer, where acts as an absorbing semiconductor P3HT both hole conductor light absorber. These harvesters perform remarkably well with maximum incident-photon-to-current efficiency (IPCE) 80% power conversion 5.13% under air-mass 1.5 global (AM 1.5G) illumination intensity 100 mW cm−2. devices are highly...
A power conversion efficiency of 10.4% is demonstrated in planar CH3 NH3 PbBr3 hybrid solar cells without hysteresis the J-V curve, by way controlled crystallization spin-coating process. The high attributed to formation a dense thin film introduction HBr solution because increases solubility and forms thinner layer with full surface coverage.
Planar CH3NH3PbI3 perovskite solar cells with constant 17.2% average power conversion efficiency irrespective of the scan rate are described. These properties attributed to formation a pure CH3 NH3 PbI3 thin film by introduction HI solution. Thereby, charge-injection/separation efficiency, charge-collection diffusion coefficient, carrier lifetime, and traps improved. As service our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed...
Readily commercializable and cost-effective next-generation CsPbBr
Golden solar cells: Several positive effects arise from the addition of truncated octahedral Au nanoparticles (ca. 70 nm diameter) to bulk heterojunction (BHJ) photovoltaic cells fabricated a variety donor polymers and PC70BM as acceptor (see picture). At optimized blend ratio (5 wt %) in active layer, power conversion efficiency increased for all polymer/PC70BM systems under study.
Colloidal metal–halide perovskite quantum dots (QDs) with a dimension less than the exciton Bohr diameter DB (quantum size regime) emerged as promising light emitters due to their spectrally narrow light, facile color tuning, and high photoluminescence efficiency (PLQE). However, size-sensitive emission wavelength purity low electroluminescence are still challenging aspects. Here, we demonstrate highly efficient light-emitting diodes (LEDs) based on colloidal nanocrystals (NCs) in > (regime...
Sb(2)S(3)-sensitized mesoporous-TiO(2) solar cells using several conjugated polymers as hole-transporting materials (HTMs) are fabricated. We found that the cell performance was strongly correlated with chemical interaction at interface of Sb(2)S(3) sensitizer and HTMs through thiophene moieties, which led to a higher fill factor (FF), open-circuit voltage (V(oc)), short-circuit current density (J(sc)). With application PCPDTBT...
We fabricated highly efficient planar type CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3−x</sub>Cl<sub>x</sub> (MAPbI<sub>3−x</sub>Cl<sub>x</sub>) mixed halide perovskite solar cells <italic>via</italic> spray coating with a controlled composition of the solvents.
Additional photon-harvesting by hole transporting materials in Sb2S3-sensitized solar cell is demonstrated through the formation of electron channels transporter such as P3HT (poly(3-hexylthiophene)) and PCPDTBT(poly(2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7(2,1,3-benzothiadiazole)) that can act both a conductor light absorber. As result, short-circuit current density improved with an increment overall efficiency. These findings provide new insights into use...
Perovskite-perovskite tandem solar cells with open-circuit voltages of over 2.2 V are reported. These cost-effective, solution-processible perovskite hybrid high fabricated by the simple lamination a front planar MAPbBr3 cell and back MAPbI3 cell.
A highly efficient PEN/ITO/ZnO/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite/PTAA/Au flexible planar solar cell with 1.1 V <italic>V</italic><sub>oc</sub>, 18.7 mA cm<sup>−2</sup><italic>J</italic><sub>sc</sub>, 75% FF, and 15.4% <italic>η</italic> for the forward scan direction 76% FF 15.6% reverse under illumination of 1 Sun was demonstrated.
A high-quality Sb<sub>2</sub>S<sub>3</sub> thin-absorber with controllable thickness was reproducibly formed by atomic layer deposition (ALD) technique.