A5019305209- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Copper-based nanomaterials and applications
- Optical properties and cooling technologies in crystalline materials
- ZnO doping and properties
- Molecular Junctions and Nanostructures
- Nausea and vomiting management
- Supercapacitor Materials and Fabrication
- Advancements in Solid Oxide Fuel Cells
- Fullerene Chemistry and Applications
- Intermetallics and Advanced Alloy Properties
- Graphene research and applications
- Nanomaterials and Printing Technologies
- Semiconductor Quantum Structures and Devices
- Carbon Nanotubes in Composites
- Thermodynamic and Structural Properties of Metals and Alloys
- Astrophysical Phenomena and Observations
- Electronic and Structural Properties of Oxides
Beihang University
2024-2025
University of Toronto
2020-2024
China National Petroleum Corporation (China)
2024
Peking University
2015-2022
Collaborative Innovation Center of Quantum Matter
2016-2022
Southern University of Science and Technology
2020-2021
Xinyu University
2021
Kunming University
2015-2016
Shanxi University
2016
Yunnan University
2013-2015
The highest power conversion efficiencies (PCEs) reported for perovskite solar cells (PSCs) with inverted planar structures are still inferior to those of PSCs regular structures, mainly because lower open-circuit voltages (Voc). Here we report a strategy reduce nonradiative recombination the devices, based on simple solution-processed secondary growth technique. This approach produces wider bandgap top layer and more n-type film, which mitigates recombination, leading an increase in Voc by...
Abstract Understanding the fundamental properties of buried interfaces in perovskite photovoltaics is paramount importance to enhancement device efficiency and stability. Nevertheless, accessing poses a sizeable challenge because their non‐exposed feature. Herein, mystery interface full stacks deciphered by combining advanced situ spectroscopy techniques with facile lift‐off strategy. By establishing microstructure–property relations, basic losses at contact are systematically presented, it...
The charge-carrier balance strategy by interface engineering is employed to optimize the transport in inverted planar heterojunction perovskite solar cells. N,N-Dimethylformamide-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and poly(methyl methacrylate)-modified PCBM are utilized as hole electron selective contacts, respectively, leading a high power conversion efficiency of 18.72%.
Abstract Hybrid lead halide perovskites have emerged as high-performance photovoltaic materials with their extraordinary optoelectronic properties. In particular, the remarkable device efficiency is strongly influenced by perovskite crystallinity and film morphology. Here, we investigate crystallisation kinetics growth mechanism in real time from liquid precursor continually to final uniform film. We utilize some advanced situ characterisation techniques including synchrotron-based grazing...
Organic–inorganic lead halide perovskites are emerging materials for the next‐generation photovoltaics. Lead halides most commonly used precursors perovskite active layers. Recently, acetate (Pb(Ac) 2 ) has shown its superiority as potential replacement traditional halides. Here, we demonstrate a strategy to improve efficiency solar cell based on precursor. We utilized methylammonium bromide an additive in Pb(Ac) and iodide precursor solution, resulting uniform, compact pinhole‐free films....
Lead halide perovskite films have witnessed rapid progress in optoelectronic devices, whereas polycrystalline heterogeneities and serious native defects are still responsible for undesired recombination pathways, causing insufficient utilization of photon-generated charge carriers. Here, radiation-enhanced with ultralong carrier lifetimes exceeding 6 μs single-crystal-like electron-hole diffusion lengths more than 5 μm achieved. Prolongation charge-carrier activities is attributed to the...
Thin-film flexible solar cells are lightweight and mechanically robust. Along with rapidly advancing battery technology, panels expected to create niche products that require lightweight, mechanical flexibility, moldability into complex shapes, such as roof-panel for electric automobiles, foldable umbrellas, camping tents, etc. In this paper, we provide a comprehensive assessment of relevant materials suitable making cells. Substrate reviewed include metals, ceramics, glasses, plastics. For...
Abstract The performance of perovskite photovoltaics is fundamentally impeded by the presence undesirable defects that contribute to non-radiative losses within devices. Although mitigating these has been extensively reported numerous passivation strategies, a detailed understanding loss origins devices remains elusive. Here, we demonstrate defect capturing probability estimated capture cross-section decreased varying dielectric response, producing screening effect in perovskite. resulting...
The depth-dependent defect manipulation strategy using binary modulators with selective penetrability within perovskite films can concurrently passivate the defects both in bulk and at interfaces, boosting efficiency of solar cell to 24.36%.
There exists a considerable density of interaggregate grain boundaries (GBs) and intra-aggregate GBs in polycrystalline perovskites. Mitigation is equally notable to that as can also cause detrimental effects on the photovoltaic performances perovskite solar cells (PSCs). Here, we demonstrate full-scale GB mitigation ranging from nanoscale submicron-scale GBs, by modulating crystallization kinetics using judiciously designed brominated arylamine trimer. The optimized GB-mitigated films...
Perovskite light-emitting diodes (PeLEDs) are the next promising display technologies because of their high color purity and wide gamut, while two classical emitter forms, i.e., polycrystalline domains quantum dots, encountering bottlenecks. Weak carrier confinement large leads to inadequate radiative recombination, surface ligands on dots main annihilation sites for injected carriers. Here, pinpointing these issues, we screened out an amphoteric agent, namely, 2-(2-aminobenzoyl)benzoic acid...
The highest efficiencies reported for perovskite solar cells so far have been obtained mainly with methylammonium and formamidinium mixed cations. Currently, high-quality mixed-cation thin films are normally made by use of antisolvent protocols. However, the widely used "antisolvent"-assisted fabrication route suffers from challenges such as poor device reproducibility, toxic hazardous organic solvent, incompatibility scalable process. Here, a simple dual-source precursor approach is...
Metal halide perovskite films are endowed with the nature of ions and polycrystallinity. Formamidinium iodide (FAI)-based films, which include large cations (FA) incorporated into crystal lattice, most likely to induce local defects due presence unreacted FAI species. Here, a diboron-assisted strategy is demonstrated control induced by both inside grain boundaries at surface regions. The diboron compound (C12 H10 B2 O4 ) can selectively react FAI, leading reduced defect densities....