A5033384086- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Nanoplatforms for cancer theranostics
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- Cancer, Hypoxia, and Metabolism
- Photodynamic Therapy Research Studies
- Geological and Geophysical Studies
- Nanoparticle-Based Drug Delivery
- Photoacoustic and Ultrasonic Imaging
- Dendrimers and Hyperbranched Polymers
- Methane Hydrates and Related Phenomena
- Pancreatic and Hepatic Oncology Research
- Advanced Photocatalysis Techniques
- Geological formations and processes
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Ultrasound and Hyperthermia Applications
National University of Singapore
2024
Beijing Institute of Technology
2018-2024
National University Cancer Institute, Singapore
2024
Peking University
2020-2022
Zhengzhou University
2017-2019
Innovation Team (China)
2019
Target (United States)
2019
Evening out the heat The conversion of precursors into active layer perovskite solar cells normally occurs by heating underlying substrate. Conversion tends to occur near top film, where solvent is lost, and unwanted preheating reactants substrate before reaction. Li et al . show that use a surrounding transfer oil (anisole) leads more rapid even heating, removes solvent, avoids air water contamination effects. larger grains uniform films led much greater retention efficiency in moving from...
The mixtures of cations and anions used in hybrid halide perovskites for high-performance solar cells often undergo element phase segregation, which limits device lifetime. We adapted Schelling's model segregation to study individual cation migration found that the initial film inhomogeneity accelerates materials degradation. fabricated perovskite films (FA1-xCsxPbI3; where FA is formamidinium) through addition selenophene, led homogeneous distribution retarded aggregation during processing...
Abstract Enhancing device lifetime is one of the essential challenges in perovskite solar cells. The ultrathin Eu‐MOF layer introduced at interface between electron‐transport and absorber to improve stability. Both Eu ions organic ligands MOF can reduce defect concentration carrier transport. Moreover, due Förster resonance energy transfer effect, films light utilization decomposition under ultraviolet light. Meanwhile, also turns tensile strain compressive films. As a result, corresponding...
Perovskite/silicon tandem solar cells are promising to penetrate photovoltaic market. However, the wide-bandgap perovskite absorbers used in top-cell often suffer severe phase segregation under illumination, which restricts operation lifetime of cells. Here, a strain modulation strategy fabricate light-stable perovskite/silicon is reported. By employing adenosine triphosphate, residual tensile absorber successfully converted compressive strain, mitigates light-induced ion migration and...
Metal halide perovskites are promising as next-generation photovoltaic materials, but stability issues still a huge obstacle to their commercialization. Here, the formation and evolution of cracks in perovskite films during thermal cycling, which affect mechanical stability, investigated. Compressive strain is employed suppress delamination by situ formed polymers with low elastic modulus crystal growth. The resultant devices pass thermal-cycling qualification (IEC61215:2016), retaining 95%...
Abstract Improving device lifetime is one of the critical challenges for practical use metal halide perovskite solar cells (PSCs), wherein a reliable encapsulation indispensable. Herein, based on an in‐depth understanding degradation mechanism PSCs, solvent‐free and low‐temperature melting technique, by employing low‐cost paraffin as encapsulant that compatible with absorbers, demonstrated. The strategy enables full encapsulating operations to be undertaken under ambient environment. It...
Oral drug delivery systems (ODDSs) have attracted considerable attention in relation to orthotopic colon cancer therapy due certain popular advantages. Unfortunately, their clinical applications are generally limited by the side-effects caused systemic exposure and poor real-time monitoring capabilities. Inspired characteristics of pH changes gastrointestinal tract (GIT) specific enzymes secreted colonic microflora, we anchored polyacrylic acid (PAA) chitosan (CS) on Gd3+-doped mesoporous...
Abstract The long‐term stability issue of halide perovskite solar cells hinders their commercialization. residual stress–strain affects device stability, which is derived from the mismatched thermophysical and mechanical properties between adjacent layers. In this work, we introduced Rb 2 CO 3 layer at interface SnO /perovskite with hierarchy morphology snowflake‐like microislands dendritic nanostructures. With a suitable thermal expansion coefficient, benefits interfacial stress relaxation...
Incorporating alkylammonium cations atop the 3D perovskite enables effective defect passivation and significantly enhances power conversion efficiency of solar cells. However, diversity durability this strategy have been limited to ligand type diffusion ligands due high reactivity. Here, we designed bulky "T-shaped" conjugated carbazole with inner π–π interaction enlarged steric hindrance minimize while maintaining effects. As verified by grazing incidence X-ray diffraction transient...
To achieve high power conversion efficiency in perovskite/silicon tandem solar cells, it is necessary to develop a promising wide-bandgap perovskite absorber and processing techniques relevance. date, the performance of devices based on still limited mainly by carrier recombination at their electron extraction interface. Here, we demonstrate assembling binary two-dimensional both alternating-cation-interlayer phase Ruddlesden−Popper passivate perovskite/C60 The strategy takes effects not...
Abstract Sonodynamic therapy (SDT) always causes tumor hypoxia aggravation which can induce malignant cell proliferation and drug resistance. To overcome these disadvantages, a cascaded delivery system (Lipo/HMME/ACF@MnO 2 ‐AS1411) is constructed for synergistic enhanced sonodynamic therapy. First, hematoporphyrin monomethyl ether (HMME) acriflavine (ACF) are encapsulated in the lipid layers inner aqueous cores of liposomes, respectively. Then ultrathin manganese dioxide (MnO ) nanosheets...
Under thermal stress, perovskite materials suffer from volatile component loss or ion migration, etc., which is challenging for steady power output (SPO) of the resulting solar cells (PSCs) under practical operation conditions. Herein, we innovatively introduce silicon dioxide particles at perovskite/hole transport layer interface, simultaneously serve as heat dissipation material due to their higher conductivity and a surface passivator through coordination between undercoordinated lead...
Developing low cost and stable metal electrode is crucial for mass production of perovskite solar cells (PSCs). As an earth-abundant element, Cu becomes alternative candidate to replace noble electrodes such as Au Ag, due its comparable physiochemical properties with simultaneously good stability cost. However, the undesirable band alignment associated device architecture impedes exploration efficient Cu-based n-i-p PSCs. Here, we demonstrated ability tuning Fermi level ( <mml:math...
As an emerging sunlight‐harvesting material, halide perovskite has obtained extensive achievements on device efficiency and stability in the past decade. Especially, of lab‐scale solar cells (PSCs, 25.2%) is already comparable with that crystalline silicon cells. However, development large‐scale modules far behind small area devices due to difficult fabrication process stringent requirements for film quality, Achilles’ heel hinder their commercialization. Therefore, coating techniques need...
Wide-bandgap perovskites are promising absorbers for state-of-the-art tandem solar cells to feasibly surpass Shockley-Queisser limit with low cost. However, the commonly used mixed halide suffer from poor stability; particularly, photoinduced phase segregation. Electrospray deposition is developed bridge gap of growth rate between iodide and bromide components during film by spatially confining anion diffusion eliminating kinetic difference, which universally improves initial homogeneity...