A5059765302- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Ga2O3 and related materials
- ZnO doping and properties
- Advanced Sensor Technologies Research
- 2D Materials and Applications
- Thermal properties of materials
- Copper-based nanomaterials and applications
- Advanced Photocatalysis Techniques
- Mechanical and Optical Resonators
- Organic Light-Emitting Diodes Research
- Mechanical and Thermal Properties Analysis
- Advanced Memory and Neural Computing
- Photoreceptor and optogenetics research
- Chemical Thermodynamics and Molecular Structure
- Electronic and Structural Properties of Oxides
- Calibration and Measurement Techniques
- Microwave Dielectric Ceramics Synthesis
- TiO2 Photocatalysis and Solar Cells
- Pigment Synthesis and Properties
- Thermal Expansion and Ionic Conductivity
- thermodynamics and calorimetric analyses
Helmholtz-Zentrum Berlin für Materialien und Energie
2023-2025
Kyungpook National University
2006-2025
Pohang TechnoPark (South Korea)
2006
Abstract Mixed‐halide perovskites have emerged as outstanding light absorbers that enable the fabrication of efficient solar cells; however, their instability hinders commercialization such systems. Grain‐boundary (GB) defects and lattice tensile strain are critical intrinsic‐instability factors in polycrystalline perovskite films. In this study, light‐induced cross‐linking acrylamide (Am) monomers with non‐crystalline films is used to fabricate highly stable cells (PSCs). The Am induce...
Abstract Mixed tin–lead perovskites suffer from structural instability and rapid tin oxidation; thus, the investigation of their optimal composition ranges is important to address these inherent weaknesses. The critical role triple cations in mixed Sn–Pb iodides studied by performing a wide range compositional screenings over mechanochemically synthesized bulk solution‐processed thin films. A ternary phase map FA (Sn 0.6 Pb 0.4 )I 3 , MA(Sn Cs(Sn formed, promising window (FA 0.6− x MA Cs )Sn...
Abstract Novel, low‐voltage, high‐detectivity, solution‐processed, flexible near‐infrared (NIR) photodetectors for optoelectronic applications are realized and their properties investigated the first time. This is achieved by synthesizing Ag 2 Se nanoparticles (NPs) in aqueous solutions, depositing highly crystalline thin films at 150 °C with redistributed NPs inks. The high conductivity low trap concentration of annealed result from formed inside improved film quality, respectively. These...
We present a surface reconstruction strategy for tin–lead perovskites, effectively addressing the issue of oxidized Sn fragments on surfaces and interfaces. Our treatment involving postfabrication iodide supplementation regulates undesired binding states reconstructs compositional gradient. Through surface-sensitive depth-resolved analysis, we unveil strong correlation among disorder, photovoltage, operational stability in perovskites. Surface-reconstructed perovskite films demonstrate...
Abstract A self‐powered, color‐filter‐free blue photodetector (PD) based on halide perovskites is reported. high external quantum efficiency (EQE) of 84.9%, which the highest reported EQE in PDs, achieved by engineering A‐site monovalent cations wide‐bandgap perovskites. The optimized composition formamidinium (FA)/methylammonium (MA) increases heat formation, yielding a uniform and smooth film. incorporation Cs + ions into FA/MA suppresses trap density charge‐carrier mobility, average...
Abstract All‐perovskite tandem solar cells have garnered considerable attention because of their potential to outperform single‐junction cells. However, charge recombination losses within narrow‐bandgap (NBG) perovskite subcells hamper the advancement this technology. Herein, we introduce a lithium salt, bis(trifluoromethanesulfonyl)imide (LiTFSI), for modifying NBG perovskites. Interestingly, LiTFSI bifunctionally passivates surface and bulk by dissociating into Li + TFSI − ions. We found...
Solvent engineering by Lewis-base solvent and anti-solvent is well known for forming uniform stable perovskite thin films. The phase crystallizes from an intermediate Lewis-adduct upon annealing-induced crystallization. Herein, it explored the effects of trimethyl phosphate (TMP), as a novel aprotic with low donor number film formation photovoltaic characteristics solar cells (PSCs). As compared to dimethylsulfoxide (DMSO) or dimethylformamide (DMF), usage TMP directly phase, i.e., reduces...
Herein, we investigate the effects of temperature and thiourea addition rate on synthesis copper sulfide nanoparticles (CuS NPs) via a chemical co-precipitation method, exploring their impact size morphology CuS NPs. Our systematic approach resulted in successful NPs with significantly smaller nanoflower sizes than previously reported literature, providing insights into nucleation growth mechanisms under various conditions. Furthermore, photocatalytic activity synthesized three types...
Perovskite Solar Cells In article number 2302743, Gill Sang Han, Hyun Suk Jung and co-workers develop highly efficient stable perovskite solar cells (PSCs) modules by introducing light-induced cross-linking of acrylamide monomers with non-crystalline films. This strategy effectively passivates grain boundary defects, the film becomes hydrophobic after cross-linking, ensuring stability PSCs under harsh conditions.
Abstract In this work, a novel real‐time current‐voltage ( J–V ) absorbance spectroscopy (RTJAS) setup is introduced for directly observing halide segregation in mixed perovskite solar cells under broadband light illumination, simulating exposure. The incorporates source calibrated to one sun irradiation and CMOS camera simultaneous capture of all diffracted wavelengths. measurements are performed concurrently with spectra collection, enabling situ analysis light‐induced degradation due...
Perovskite solar cells (PSCs), which have surprisingly emerged in recent years, are now aiming at commercialization. Rapid, low-temperature, and continuous fabrication processes that can produce high-efficiency PSCs with a reduced cost shortened energy payback time important challenges on the way to Herein, we report reactive ion etching (RIE) method, is an ultrafast room-temperature technique, fabricate mesoporous TiO2 (mp-TiO2) as electron transport layer for PSCs. Replacing conventional...