A5089090762- Conducting polymers and applications
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Advanced Sensor and Energy Harvesting Materials
- Thin-Film Transistor Technologies
- solar cell performance optimization
- Ionic liquids properties and applications
- ZnO doping and properties
- Machine Learning in Materials Science
- Coral and Marine Ecosystems Studies
- Electrochemical Analysis and Applications
- Synthesis and Properties of Aromatic Compounds
- Strong Light-Matter Interactions
- Semiconductor materials and interfaces
- Advanced battery technologies research
- Nanomaterials and Printing Technologies
- Graphene research and applications
- Advanced Chemical Sensor Technologies
- Supercapacitor Materials and Fabrication
- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Ga2O3 and related materials
Korea Research Institute of Chemical Technology
2018-2024
Hanwha Solutions (South Korea)
2024
Gwangju Institute of Science and Technology
2011-2020
Gwangju University
2014-2020
Government of the Republic of Korea
2015-2020
Yuhan University
2020
Institut of Research in Solar Energy and New Energies
2018
The past two decades of vigorous interdisciplinary approaches has seen tremendous breakthroughs in both scientific and technological developments bulk-heterojunction organic solar cells (OSCs) based on nanocomposites π-conjugated semiconductors. Because their unique functionalities, the OSC field is expected to enable innovative photovoltaic applications that can be difficult achieve using traditional inorganic cells: OSCs are printable, portable, wearable, disposable, biocompatible,...
Abstract Despite nearly two decades of research, the absence ideal flexible and transparent electrodes has been largest obstacle in realizing printable electronics for future technologies. Here we report fabrication ‘polymer-metal hybrid electrodes’ with high-performance properties, including a bending radius <1 mm, visible-range transmittance>95% sheet resistance <10 Ω sq −1 . These features arise from surface modification plastic substrates using an amine-containing nonconjugated...
Corrosive ionic defects in perovskite films degrade solar cells (PSCs) and long-term stable PSCs are realized by neutralizing the defects.
The importance of interfacial engineering as a new strategy for improving the power conversion efficiencies (PCEs) planar-heterojunction (PHJ) perovskite solar cells is highlighted by incorporating sol–gel ZnO modified with PCBM.
We investigated the charge dynamics of conductivity enhancement from 2 to $1000\text{ }\text{ }\mathrm{S}/\mathrm{cm}$ in poly(3, 4-ethylenedioxythiophene):poly(styrenesulfonate) as induced by structural changes through addition a polar solvent and following bath treatment. Our results indicate that selectively enhanced $\ensuremath{\pi}\mathrm{\text{\ensuremath{-}}}\ensuremath{\pi}$ coupling polymer chains, resulting reduction disorder tremendously increasing carrier mobility, which yielded...
Stretchable conductive materials have received great attention owing to their potential for realizing next-generation stretchable electronics. However, the simultaneous achievement of excellent mechanical stretchability and high electrical conductivity as well cost-effective fabrication has been a significant challenge. Here, we report highly conducting polymer that was obtained by incorporating an ionic liquid. When 1-ethyl-3-methylimidazolium tetracyanoborate (EMIM TCB) added aqueous...
Abstract The energy level alignment of the perovskite and hole transporting materials (HTMs) is essential for increasing open‐circuit voltage ( V oc ) enhancing performance solar cells (PSCs). In this work, new sequentially fluorinated poly(triarylamine) polymers (PTAA, 1F‐PTAA, 2F‐PTAA) with tuned highest occupied molecular orbital (HOMO) levels are developed applied as HTMs into PSCs. fluorination approach successfully leads to stepwise downshifting HOMO PTAA derivatives, resulting in an...
Porous planar structure, as a new concept of low temperature processing ETL, enables to achieve unprecedented PCE in flexible unit cells and large area modules.
Despite the recent unprecedented increase in power conversion efficiencies (PCEs) of small-area devices (≤0.1 cm2 ), PCEs deteriorate drastically for PSCs larger areas because incomplete film coverage caused by dewetting hydrophilic perovskite precursor solutions on hydrophobic organic charge-transport layers (CTLs). Here, an innovative method fabricating scalable all types CTLs is reported. By introducing amphiphilic conjugated polyelectrolyte as interfacial compatibilizer, uniform films...
We develop a new series of ionic liquids with dual functionality as dopant for hole transport materials and passivator perovskite surfaces, which enables the production large-area solar modules efficiencies approaching 20%.
Despite the excellent work function adjustability of conjugated polyelectrolytes (CPEs), which induce a vacuum level shift via formation permanent dipoles at CPE/metal electrode interface, exact mechanism electron injection through CPE transport layer (ETL) remains unclear. In particular, understanding ionic motion within ETLs when overcoming sizable barrier is significant challenge. Because functionality CPEs key component for such functions, rigorous analysis using highly controlled ion...
A new tandem architecture for printable photovoltaics using a versatile organic nanocomposite containing photoactive and interfacial materials is demonstrated. The forms an ideal self-organized recombination layer via spontaneous vertical phase separation, which yields simplified structure fabricated with only four component layers high efficiency of 10.8%.
We report the origin of strong UV-irradiation dependence, generally known as a “light-soaking” process, in inverted polymer solar cells (I-PSCs) using interface an sol-gel processed titanium sub-oxide (TiOx) and indium tin oxide (ITO) cathode. When I-PSCs incorporating TiOx electron-selecting layer were fabricated, as-prepared devices exhibited anomalous J-V curve with kink shape, resulting extremely low efficiency. However, shape disappeared after white light irradiation for considerable...
Abstract The fabrication of organic photovoltaic modules via printing techniques has been the greatest challenge for their commercial manufacture. Current module architecture, which is based on a monolithic geometry consisting serially interconnecting stripe-patterned subcells with finite widths, requires highly sophisticated patterning processes that significantly increase complexity production lines and cause serious reductions in efficiency due to so-called aperture loss series connection...
Highly efficient P-I-N type perovskite/bulk-heterojunction (BHJ) integrated solar cells (ISCs) with enhanced fill factor (FF) (≈80%) and high near-infrared harvesting (>30%) are demonstrated by optimizing the BHJ morphology a novel n-type polymer, N2200, new solvent-processing additive. This work proves feasibility of highly ISCs panchromatic absorption as photovoltaic architecture provides important design rules for ISCs. As service to our authors readers, this journal supporting...
The paired electric dipole layers significantly intensify the built-in field across perovskite layer, resulting in suppressed charge trapping of photogenerated charges.
The hole-transporting layer is an essential component in a perovskite solar cell (PSC) and plays key role controlling both power conversion efficiency (PCE) stability. Here, we report new material (HTM), methoxy group-containing poly(triarylamine) (PTAA) (CH3O-PTAA), for efficient PSCs with improved thermal As compared to commonly used PTAA (CH3-PTAA), CH3O-PTAA exhibits enhanced doping ability stability under stress. With CH3O-PTAA, (FAPbI3)0.85(MAPbBr3)0.15-based show high PCEs over 20%,...
Significance When various electronic appliances used in everyday life become deformable and transparent, they will provide tremendous versatility the design use of see-through, smart mobile applications, exceeding limitations best developed conventional silicon technologies, which are available only rigid, opaque forms. However, even recently discovered innovative semiconducting components have failed to simultaneously achieve such flexibility transparency. Thus, existing options still...
Nucleation and growth processes can be effectively controlled in organic semiconductor films through a new concept of template-mediated molecular crystal seeds during the phase transition; effective control these ensures millimeter-scale domains, as well performance resulting with intrinsic hole mobility 18 cm(2) V(-1) s(-1).
Ionic defects (e.g., organic cations and halide anions), preferably residing along grain boundaries (GBs) on perovskite film surfaces, are known to be a major source of the notorious environmental instability solar cells (PeSCs). Although passivating ionic is desirable, previous approaches using Lewis base or acid molecules as additives suppress only negatively positively charged defects, thus leaving oppositely defects. In this work, both cationic anionic inside methyl ammonium lead...
Abstract For semitransparent devices with n‐i‐p structures, a metal oxide buffer material is commonly used to protect the organic hole transporting layer from damage due sputtering of transparent conducting oxide. Here, surface treatment approach addressed for tungsten oxide‐based electrodes through slight modification niobium Incorporation this electrode technique protective significantly recovers fill factor 70.4% 80.3%, approaching values conventional opaque devices, which results in...