A5029791520- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Carbon Nanotubes in Composites
- Graphene research and applications
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Crystallization and Solubility Studies
- Supercapacitor Materials and Fabrication
- Nanowire Synthesis and Applications
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Advanced Materials and Mechanics
- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Neuroscience and Neural Engineering
- Chalcogenide Semiconductor Thin Films
- Aerogels and thermal insulation
- TiO2 Photocatalysis and Solar Cells
- MXene and MAX Phase Materials
- Advanced battery technologies research
- Semiconductor materials and interfaces
- Electrospun Nanofibers in Biomedical Applications
- Transition Metal Oxide Nanomaterials
- Thermal Radiation and Cooling Technologies
Westlake University
2020-2025
Zhejiang University
2024
Peking University
2010-2022
Purdue University West Lafayette
2018-2022
Ames National Laboratory
2018-2019
Iowa State University
2017-2019
Vanderbilt University
2018
Tsinghua University
2018
Northwestern University
2018
University of Cincinnati
2018
Organic-inorganic metal halide perovskite solar cells were fabricated by laminating films of a carbon nanotube (CNT) network onto CH3NH3PbI3 substrate as hole collector, bypassing the energy-consuming vacuum process deposition. In absence an organic hole-transporting material and contact, CNTs formed cell with efficiency up to 6.87%. The CH3NH3PbI3/CNTs semitransparent showed photovoltaic output dual side illuminations due transparency CNT electrode. Adding spiro-OMeTAD forms composite...
Transparent, stretchable films of carbon nanotubes (CNTs) have attracted significant attention for applications in flexible electronics, while the lack structural strength CNT networks leads to deformation and failure under high mechanical load. In this work, enhancement load transfer capabilities by chemical vapor deposition graphene nanotube voids is proposed. The hybridization significantly strengthens networks, especially at joints, enhances their resistance buckling bundling large...
Carbon nanotube-Si and graphene-Si solar cells have attracted much interest recently owing to their potential in simplifying manufacturing process lowering cost compared Si cells. Until now, the power conversion efficiency of remains under 10% well below that counterpart. Here, we involved a colloidal antireflection coating onto monolayer cell enhanced 14.5% standard illumination (air mass 1.5, 100 mW/cm(2)) with stable effect over long time. The treatment was realized by simple spin-coating...
Design and fabrication of structurally optimized electrode materials are important for many energy applications such as supercapacitors batteries. Here, we report a three-component, hierarchical, bulk with tailored microstructure electrochemical properties. Our supercapacitor consists three-dimensional carbon nanotube (CNT) network (also called sponge) flexible conductive skeleton, an intermediate polymer layer (polypyrrole, PPy) good interface, metal oxide outside providing more surface...
Abstract Supported nanoparticles are broadly employed in industrial catalytic processes, where the active sites can be tuned by metal-support interactions (MSIs). Although it is well accepted that supports modify chemistry of metal nanoparticles, systematic utilization MSIs for achieving desired performance still challenging. The developments with appropriate chemical properties and identification resulting main barriers. Here, we develop two-dimensional transition carbides (MXenes)...
Sn(II)-based halide perovskite semiconductor materials are promising for a variety of electronics and optoelectronics applications but suffer from poor intrinsic stability. Here, we report the synthesis characterization stable Sn (II)-based two-dimensional featuring π-conjugated oligothiophene ligand, namely (4Tm)2SnI4, where 4Tm is 2-(3″',4'-dimethyl-[2,2':5',2″:5″,2″'-quaterthiophen]-5-yl)ethan-1-ammonium. The conjugated ligands facilitate formation micrometer-size large grains, improve...
Abstract Two-dimensional hybrid organic-inorganic perovskites with strongly bound excitons and tunable structures are desirable for optoelectronic applications. Exciton transport annihilation two key processes in determining device efficiencies; however, a thorough understanding of these is hindered by that rates often convoluted exciton diffusion constants. Here we employ transient absorption microscopy to disentangle quantum-well-thickness-dependent two-dimensional perovskites, unraveling...
Abstract Perovskite photovoltaics, typically based on a solution-processed perovskite layer with film thickness of few hundred nanometres, have emerged as leading thin-film photovoltaic technology. Nevertheless, many critical issues pose challenges to its commercialization progress, including industrial compatibility, stability, scalability and reliability. A thicker scale micrometres could mitigate these issues. However, the efficiencies thick-film cells lag behind those nanometre...
Spring-like carbon nanotube ropes consisting of perfectly arranged loops are fabricated by spinning single-walled films, and can sustain tensile strains as high 285%.
Combining carbon nanotubes (CNTs), graphene or conducting polymers with conventional silicon wafers leads to promising solar cell architectures rapidly improved power conversion efficiency until recently. Here, we report CNT-Si junction cells efficiencies reaching 15% by coating a TiO2 antireflection layer and doping CNTs oxidative chemicals, under air mass (AM 1.5) illumination at calibrated intensity of 100 mW/cm2 an active device area 15 mm2. The significantly inhibits light reflectance...
Graphene nanoribbon aerogels are fabricated by directly unzipping multi-walled carbon nanotube sponges. These fascinating materials have potential applications as high performance nanocomposites and supercapacitor electrodes. As a service to our authors readers, this journal provides supporting information supplied the authors. Such peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support issues arising from (other than missing files) should...
Developing flexible and deformable supercapacitor electrodes based on porous materials is of high interest in energy related fields. Here, we show that carbon nanotube sponges, consisting highly conductive networks, can serve as compressible deformation-tolerant aqueous or organic electrolytes. In electrolytes, the sponges maintain a similar specific capacitance (>90% original value) under predefined compressive strain 50% (corresponding to volume reduction 50%), retain more than 70% 80%...
Edges of two-dimensional (2D) halide perovskites are found to exhibit unusual properties such as enhanced photoluminescence lifetime and reduced emission energy. Here, we report the formation mechanism dynamic nature edge states on exfoliated 2D perovskite thin crystals. In contrast other materials, in extrinsic can be triggered by moisture with a concentration low ∼0.5 ppm. High-resolution atomic force microscopy transmission electron characterizations reveal width low-energy is ∼40 nm...
Manipulating materials with atomic-scale precision is essential for the development of next-generation material design toolbox. Tremendous efforts have been made to advance compositional, structural, and spatial accuracy deposition patterning. The family 2D provides an ideal platform realize atomic-level architectures. wide rich physics these led fabrication heterostructures, superlattices, twisted structures breakthrough discoveries applications. Here, we report a novel tool that...
Two-dimensional (2D) semiconductor heterostructures are key building blocks for many electronic and optoelectronic devices. Reconfiguring the band-edge states modulating their interplay with charge carriers at interface in a continuous manner have long been sought yet challenging. Here, using organic semiconductor-incorporated 2D halide perovskites as model system, we realize manipulation of distribution via mechanical-rather than chemical or thermal-regulation. Compression induces...
The unique semiconductor properties, synthetic strategies, and corresponding optoelectronic applications of quasi-2D halide perovskite crystals are summarized discussed in this review.