A5101834478- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Thin-Film Transistor Technologies
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Nanomaterials and Printing Technologies
- Semiconductor materials and devices
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Nanowire Synthesis and Applications
- solar cell performance optimization
- Advancements in Battery Materials
- Agriculture, Soil, Plant Science
- Engineering Applied Research
- Polyoxometalates: Synthesis and Applications
- Silicon and Solar Cell Technologies
- Advanced Memory and Neural Computing
- Advanced Battery Technologies Research
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- Food Quality and Safety Studies
- Metal complexes synthesis and properties
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
Korea Institute of Materials Science
2014-2023
Korea Automotive Technology Institute
2023
Government of the Republic of Korea
2014-2021
Sejong University
2020
Gongju National University of Education
2020
Kongju National University
2013-2020
Korea Basic Science Institute
2020
Korea University
2006-2020
Kosin University Gospel Hospital
2017-2020
Hoseo University
2020
Two-dimensional (2D) molybdenum disulphide (MoS2) atomic layers have a strong potential to be used as 2D electronic sensor components. However, intrinsic synthesis challenges made this task difficult. In addition, the detection mechanisms for gas molecules are not fully understood. Here, we report high-performance constructed using atomic-layered MoS2 synthesised by chemical vapour deposition (CVD). A highly sensitive and selective based on CVD-synthesised was developed. situ...
Abstract Highly efficient and bendable organic solar cells (OSCs) are fabricated using solution‐processed silver nanowire (Ag NW) electrodes. The Ag NW films were highly transparent (diffusive transmittance ≈ 95% at a wavelength of 550 nm), conductive (sheet resistance 10 Ω sq −1 ), flexible (change in 1.1 ± 1% bending radius ≈200 μm). Power conversion efficiencies ≈5.80 5.02% obtained for devices on NWs/glass NWs/poly(ethylene terephthalate) (PET), respectively. Moreover, the NWs/PET...
Synergistic combination of metal nanoparticles and graphene modulates electronic properties graphene, leading to enhancement in gas sensitivity selectivity.
Abstract Transparent electrodes have been widely used in electronic devices such as solar cells, displays and touch screens. Highly flexible transparent are especially desired for the development of next generation devices. Although indium tin oxide (ITO) is most commonly material fabrication electrodes, its brittleness growing cost limit utility Therefore, need new conductive materials with superior mechanical properties clear urgent. Ag nanowire (AgNW) has attracting increasing attention...
Small molecules based on N-atom-linked phenylcarbazole-fluorene as the main scaffold, end-capped with spirobifluorene derivatives, are developed organic hole-transporting materials for highly efficient perovskite solar cells (PSCs) and bulk heterojunction (BHJ) inverted (IOSCs). The CzPAF-SBF-based devices show remarkable device performance excellent long-term stability in PSCs BHJ IOSCs a maximum PCE of 17.21% 7.93%, respectively. As service to our authors readers, this journal provides...
The short-circuit current density of inverted organic solar cells comprising a solution-processed titania electron transport layer increases with continuous illumination in air and saturates after 10 min. On extended exposure (>2 days), the open-circuit voltage devices also. improvement device characteristics over short time scales is attributed to filling shallow traps titania. With an increase photoconductivity titania, accordingly. on electrostatic field across diodes when...
Three orders of magnitude is the range over which grain size (see figure) can be tuned in solution-processed organic semiconductor thin films for TFTs. Fluorinated triethylsilyl anthradithiophene (FTES-ADT) added fractional amounts to seed crystallization TES-ADT. Correlation between device mobility and active layer described by a composite model that assumes charge-carrier traps are located at boundaries. Detailed facts importance specialist readers published as ”Supporting Information”....
Extremely flexible transparent conducting electrodes are developed using a combination of metal‐embedding architecture into plastic substrate and ultrathin electrodes, which leads to highly (optical transmittance ≈93% at wavelength 550 nm), (sheet resistance ≈13 Ω □ −1 ), extremely (bending radius ≈ 200 μm) electrodes. The used fabricate organic solar cells light‐emitting diodes that exhibit performance similar or superior devices fabricated on glass substrates. Moreover, the do not show...
Stretchable organic light-emitting diodes are ubiquitous in the rapidly developing wearable display technology. However, low efficiency and poor mechanical stability inhibit their commercial applications owing to restrictions generated by strain. Here, we demonstrate exceptional performance of a transparent (molybdenum-trioxide/gold/molybdenum-trioxide) electrode for buckled, twistable, geometrically stretchable under 2-dimensional random area strain with invariant color coordinates. The...
The solvent from which the active layer is drop cast dramatically influences electrical characteristics and stability of thin-film transistors comprising bis(triisopropylsilylethynyl) pentacene. Casting high boiling solvents allows slower crystallization; devices toluene chlorobenzene thus exhibit mobilities >0.1 cm2/V s on/off ratios ∼106. More importantly, choice device stability. Devices stable characteristics, whereas show hystereses on cycling, with dramatic threshold voltage...
The authors have developed a semitransparent, multilayered cathode of indium tin oxide (ITO)/Ag/tungsten (WO3) for transparent organic light-emitting diodes. device showed weak negative differential resistance (NDR), until the operating voltage 8V was reached. NDR due to resonant tunneling by both quantum barrier and well. silver (Ag2O) on Ag metal confirmed x-ray photoelectron spectroscopy, energy levels Ag2O were quantized size effect this produced channels. using ITO∕Ag∕WO3 with LiF∕Al...
3D hybrid plasmonic nanomaterials are composed of 3D-stacked Ag nanowires and nanoparticles separated by a nanoscale-thick alumina interlayer. The nanostructures exhibit strong coupling between the ultrahigh populations nanomaterials, overcoming physical limitation inefficient nanowire stacks.
Self-healing elastomers that can repair physical damage and extend their service life in medium- low-temperature environments have attracted considerable attention the field of flexible materials. However, self-healing polyurethane (PU) healing process reported previous studies regularly needs to be supported by high heating temperature long time. In this study, a simple method was developed synthesize PU film using isophorone diisocyanate (IPDI) transparent rubber solution. The...
Organic solar cells: By incorporating nonvolatile additives into blends of P3HT:PCBM, the efficiencies inverted bulk-heterojunction cells are improved almost twofold (see figure). These selectively partition P3HT phase, effectively increasing phase separation between and PCBM. Detailed facts importance to specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: The publisher...
Oxidation of silver top electrodes in polymer solar cells induces the devices to exhibit a transition from conventional inverted photovoltaic characteristics. As oxidizes, its work function increases 4.3 5.0 eV. The electrode thus reverts collecting electrons holes during device operation. We have quantified extent this transformation and find it be correlated with rate oxidation, which we can influence by altering annealing sequence photoactive layer, ultimately varying grain size electrode.
Hybrid tandem solar cells comprising an inorganic bottom cell and organic top have been designed fabricated. The interlayer combination thickness matching were optimized in order to increase the overall photovoltaic conversion efficiency. A maximum power efficiency of 5.72% was achieved along with a Voc 1.42 V, reaching as high 92% sum subcell values. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or...
High efficiency and bendable organic solar cells were fabricated using Ag nanomesh/ZnO hybrid transparent electrodes.
Recently, the rapid and significant progress in development of various stretchable electronics has triggered intense research interest. Although remarkable features transfer printing processes have enabled use inorganic crystalline semiconductors types devices, including solar cells, light‐emitting diodes, circuits, photodetectors, there are few examples using thin film semiconductors. Transfer amorphous remains a challenge because no suitable sacrificial layer is available. To meet this...
Recombination zone (RZ) confinement and charge balance are the most important factors for realizing enhanced efficiency in phosphorescent organic light emitting devices (Ph-OLEDs). Here, we demonstrated RZ movement improved Ph-OLED by varying electron transport layer 2,2',2''-(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi) thickness. The thickness increment of TPBi not only control on to emission but also shifting towards cathode. with different thick is extracted from exciplex...
A major problem in the application of mesoporous TiO2 as an electron transport layer for flexible perovskite solar cells is that a high-temperature sintering process required to remove organic additives from layer. facile oxygen plasma herein demonstrated fabricate mesoporous-structured with significant photovoltaic performance at low temperatures. When low-temperature processed modified via plasma, hinder charge are successfully decomposed. The treatment improves wettability and...
SnO2 has attracted significant attention as an electron transport layer (ETL) because of its wide optical bandgap, mobility, and transparency. However, the annealing temperature 180 °C-200 °C, reported by several studies, for fabrication ETL limits application flexible devices. Herein, we demonstrated that low-temperature deposition further surface modification with oxygen plasma enhances efficiency from 2.3% to 15.30%. Oxygen treatment improves wettability processed results in a larger...