A5065478389- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Advanced Materials and Mechanics
- Fiber-reinforced polymer composites
- Solid-state spectroscopy and crystallography
- Optical properties and cooling technologies in crystalline materials
- Tribology and Wear Analysis
- Polymer crystallization and properties
- Luminescence Properties of Advanced Materials
- Polymer Nanocomposites and Properties
- ZnO doping and properties
- Surface Modification and Superhydrophobicity
Ulsan National Institute of Science and Technology
2021-2025
Kyung Hee University
2018-2020
Government of the Republic of Korea
2019-2020
Yong In University
2019-2020
Seoul National University
1994
The energy loss in perovskite solar cells (PSCs) is a key factor that limits the full potential of photovoltaic performance to values below Shockley–Queisser limit.
Further optimization of perovskite light-emitting diodes (PeLEDs) is impeded by crystal deformation caused residual stress and defect formation with subsequent non-radiative recombination. Molecular additives for passivation are widely studied; however, the majority have insulating properties that hinder charge injection transport. Herein, highly efficient green-emitting PeLEDs reported introducing semiconducting molecular (Fl-OEGA Fl-C8A). Transmission electron microscopy shows conjugated...
Optimal optoelectronic properties of interfacial layers in perovskite solar cells are essential for achieving high power conversion efficiency. We herein demonstrated a solution-processed spinel CuCo2O4 as hole transport layer to use high-performance cells. The possessed electrical conductivity, optical transparency UV–vis–NIR, well-matched energy levels perovskite, and efficient capability the layer. were finely controlled by optimizing annealing temperature, leading 14.12% efficiency...
Vacuum deposition of perovskites is a promising method for scale-up fabrication and uniform film growth. However, improvements in the photovoltaic performance are limited by perovskite films, which not optimized high device efficiency vacuum evaporation process. Herein, we fabricate CsPbI2Br with crystallinity larger grain size controlling sequence between PbI2 CsBr. The nucleation barrier formation significantly lowered first evaporating CsBr then (CsBr–PbI2), followed sequential multiple...
Abstract Perovskite‐based tandem cells are emerging as new photovoltaic (PV) with a high efficiency that exceeds the limit of single‐junction cells. Building‐integrated PVs require attractive, but aesthetics play key roles in these urban applications. One most challenging problems respect to aesthetic PV is loss due color tuning. Here, we demonstrate for first time lossless full‐color tunable based on use textured luminescent down‐shifting (LDS) films LDS dyes ultraviolet‐selective...
Integration of NDI-ZI as a cathode interlayer in perovskite solar cells improves both device efficiency and stability, mitigating halide Ag ion migration by chemically capturing ions via electrostatic Coulombic interactions.
Among many strategies to develop high-performance perovskite solar cells, interface engineering is considered as a promising approach for achieving high power conversion efficiency.
Current–voltage hysteresis is a critical issue that impacts the photovoltaic performance of perovskite solar cells, and thus, it imperative to develop high-efficiency cells without behavior.
One of the key strategies for improving photovoltaic performance perovskite solar cells is to optimize charge transport/recombination behaviors at interfaces device. Here, we demonstrate a facile but effective method surface engineering nickel oxide thin film, which enables improved film morphology with optimal electronic states allowing substantial reduction defects between interface and hole transport layer. As result, improvement in extraction, transport, collection properties achieved by...
Passivation strategies have been proven to improve the optoelectronic properties of perovskite nanocrystals (PNCs) and suppress their ion migration; however, previous studies predominantly focused on binding affinity uncoordinated Pb2+ ions, overlooking additional interactions with monovalent cations. Here, we introduce multisite coordination ligands (composed multiple fluorine atoms) achieve formamidinium lead bromide (FAPbBr3) PNCs. One atom passivates an ion, while other atoms form...
Abstract Organic semiconductors are used in organic opto‐electronic devices because of their various advantages. However, they vulnerable to moisture and oxygen. Thus, flexible transparent encapsulations with barrier properties against oxygen need be developed fabricate bendable foldable semiconductor devices. In this study, a simple highly productive self‐assembly process is from montmorillonites by using maximized Marangoni forces co‐solvent an aqueous water non‐aqueous N...
Thermal fatigue poses a significant challenge not only in the realm of perovskite photovoltaics, but also across various optoelectronic devices. In this study, we investigate enhancement both performance...
Abstract π‐Conjugated polyelectrolytes (CPEs) have been studied as interlayers on top of a separate hole transport layer (HTL) to improve the wetting, interfacial defect passivation, and crystal growth perovskites. However, very few CPE‐based HTLs reported without rational molecular design ideal for perovskite solar cells (PeSCs). In this study, authors synthesize triphenylamine‐based anionic CPE (TPAFS‐TMA) an HTL p‐i‐n‐type PeSCs. TPAFS‐TMA has appropriate frontier orbital (FMO) levels...
Research on perovskite light-emitting diodes (PeLEDs) has primarily focused modulating crystal growth to achieve smaller grain sizes and defect passivation using organic additives. However, challenges remain in controlling the intermolecular interactions between these additives precursor ions for precise modulation of growth. In this study, we synthesize two triphenylphosphine oxide (TPPO)-based multidentate additives: bidentate hexane-1,6-diyl-bis(oxy-4-triphenylphosphine oxide) (2-TPPO)...