Tao Liang

Zhejiang University | ZJU · Department of Polymer Science and Engineering

2D magnetic materials have been attracting enormous interest for both fundamental research and potential spintronic applications. Here, this work demonstrates the van der Waals epitaxial growth of air‐stable 2D magnetic CrS2 on mica substrate by chemical vapor deposition (CVD). The layered nature, high crystallinity, stoichiometry, and high‐purity...

2D semiconductors are attracting increasing interest owing to their promising applications in high‐performance photodetection. However, the spectral response window is dictated by their intrinsic bandgaps, which is typically narrow and severely hinders their applications as broadband photodetectors. Herein, taking advantage of the outstanding optoe...

Two-dimensional (2D) magnetism is now the attention of central demands in fundamental condensed matter physics concerning about the understanding and control of new phases. The demonstration of ferromagnetism in an atomically thin layer develops the prospects for a variety of device applications of 2D van der Waals (vdW) materials. The long-range f...

Large polymer residues introduced by the graphene transfer process is still a major obstacle limiting the integration of chemical vapor deposition (CVD)-grown graphene into next-generation electronic and photoelectronic devices. Here we use cera alba, a natural and environmental-friendly material that derives from honeycomb, as the supporting layer...

Heterogeneous atoms doping has been proven as an efficient route to tune the physical and chemical properties of semiconductors, represented by the technically mature boron and phosphorus doping in bulk silicon. In the two-dimensional (2D) transitional metal dichalcogenides (TMDs) semiconductors, substitutional doping dominates compared with the in...

Combination of perylene derivatives and MoS2 exhibit contrasting photoluminescence (PL) behavior. The intense PL emission exhibits in PTCDA/MoS2 while quenching in PTCDI‐Ph/MoS2. The observed giant PL enhancement of PTCDA/MoS2 is due to the reduced bandgap, large exciton/trion ratio, and ordered morphology of PTCDA. The results can stimulate optoel...

The contrasting photoluminescence (PL) emission behavior of molybdenum disulfide‐organic perylene derivative (PDI/MoS2) based type‐II heterostructures—PTCDA/MoS2 and PTCDI‐Ph/MoS2—is explored. The significant PL enhancement is exhibited in PTCDA/MoS2 while PL quenching is observed in PTCDI‐Ph/MoS2. The intense PL emission of PTCDA/MoS2 is due to re...

Two-dimensional materials attract enormous research attentions owing to the fascinating properties and great potential applications in electronics, optoelectronics, spintronics, energy conversion, and storage. Among them, two-dimensional transitional metal dichalcogenides exhibit exceptional properties such as tunable bandgaps, phase transition, an...

2D lead iodide (PbI2) is attracting great interest due to its great potential in the application of UV photodetectors. In this work, a facile solution‐based method is developed to synthesize ultraflat PbI2 nanoflakes for high‐performance UV photodetectors. By maintaining at proximate room temperature and adding an evaporation suppression solvent fo...

Graphene synthesis by chemical vapor deposition (CVD) on Cu foil involves a series of complex interplays between the atmosphere and Cu substrate. The large number of topographical irregularities and impure elements existing in the normal Cu foils inevitably result in heterogeneous graphene nucleation and uncontrolled growth. Thus, resolving the mut...

We comprehensively studied the electrical, optical, and mechanical properties, and stability of the hybrid transparent conductive electrode (TCE) prepared by transferring graphene onto random silver nanowires (AgNW) on poly(ethylene terephthalate) (PET) substrates. Compared with the pristine AgNW TCE, the AgNW-graphene hybrid TCE was found to exhib...

Recently, two-dimensional (2D) materials have been applied in organic photovoltaics (OPVs) as electrode modifier or third component in bulk due to their high charge carrier mobility, various electronic band structure, and facile fabrication via liquid phase exfoliation. Herein, solution exfoliated few layers black phosphorus (BP) and tungsten disel...

We report the photoluminescence (PL) characteristics of van der Waals (vdW) heterojunction constructed by simply depositing organic semiconductor of 3, 4, 9, 10-perylene tetracarboxylic dianhydride (PTCDA) onto two-dimensional MoS2 monolayer. The crystallinity of PTCDA on MoS2 is significantly improved due to vdW epitaxial growth. We observe an enh...

Biogenic single crystals have been widely demonstrated to incorporate macromolecules to achieve extra damage tolerance, spurring investigations on their synthetic analogs with enhanced mechanical properties as well as the enhancement mechanism(s) behind. And the investigations rely on both rational design of the single-crystal composites and, equal...

Graphene has attracted intense research interest due to its extraordinary properties and great application potential. Various methods have been proposed for the synthesis of graphene, among which chemical vapor deposition has drawn a great deal of attention for synthesizing large-area and high-quality graphene. Theoretical understanding of the synt...

Atomically thin two-dimensional materials ranging from superconductor, metal, semiconductor to insulator are emerging as potential candidates for next-generation digital electronics and optoelectronic applications. The synthesis on a commonly used substrate and fast transfer to a plenty of desired substrates need to be addressed to meet the industr...

Silver nanowires (AgNWs) and graphene are both promising candidates as transparent conductive electrode (TCE) to replace expensive and fragile indium tin oxide (ITO) TCE. A synergistically optimized performance is expected when the advantages of AgNWs and graphene are combined. In this paper, the AgNWs-graphene hybrid electrode is architectured by...

Graphene is an ideal membrane for selective separation because of its unique properties and single-layer structure. Considerable efforts have been exerted to alter the permeability of graphene. In this study, we investigate the pathways for an oxygen atom to pass through graphene sheets. We also identify the effect of ripple’s curvature in graphene...

Alloying with various compositions is an efficient method to tailor the optoelectronic properties of two-dimensional (2D) transition metal dichalcogenides (TMDs). However, the composition distribution in the monolayer of TMDs alloys lacks detailed investigation. Here, by exploring scanning Auger electron spectroscopy, we investigate the composition...

Graphene's practical applications require its reproducible production with controlled means. In particular, graphene synthesis by chemical vapor deposition on metals has been shown to be a promising way to produce large-size and high-quality graphene film at low cost. Understanding the reaction mechanisms during the synthesis process is vital for p...

Real graphene sheets show limited anti-permeation performance deviating from the ideally flat honeycomb carbon lattice that is impermeable to gases. Ripples in graphene are prevalent and they could significantly influence carrier transport. However, little attention has been paid to the role of ripples in the permeation properties of graphene. Here...

The 0D–2D nucleation and growth mode is presented in molybdenum disulfide (MoS2) chemical vapor deposition synthesis. Partially sulfured molybdenum suboxide nucleation centers are demonstrated experimentally, followed by these centers being converted to MoS2 nanoparticles and MoS2 layer growth initiation from the nanoparticle edges. The work reveal...

Solution processed 8-hydroxyquinolinatolithium (s-Liq) was successfully applied as an efficient cathode interlayer in bulk heterojunction polymer solar cells (PSCs), giving rise to enhancement in device performance. The ultraviolet photoelectron spectra results revealed that the presence of s-Liq could lower work function of Al cathode, allowing fo...

MoS2 is widely used in many fields including spin-valleytronics, logic transistors, light emitting devices, clean energy and biology. However, controllable synthesis of two-dimensional MoS2 sheets remains a great challenge. We report the formation of round-shaped monolayer MoS2 domains with a tunable size and the shape transformation from triangle...

Chemical vapor deposition on metal substrates using gaseous hydrocarbon as carbon feedstock has proven to be a feasible way for synthesis of large-area and uniform graphene films. Meanwhile, rearrangement of amorphous carbon species extracted from solid carbon sources into crystalline graphene not only offers an alternative route for graphene growt...

Nanoscale morphology is of significance to the electronic properties of semiconducting polymers. Solution-processed poly-3-hexylthiophene (P3HT) has been demonstrated as a promising active-layer material in organic thin film transistors (OTFTs) and solar cells. Controlling the crystallinity of P3HT chains is critical for gaining high-performance de...

Graphene nucleation at oxygen-rich Cu sites instead of on the commonly assumed pure Cu surface is discovered using high-spatial-resolution scanning Auger electron microscopy, which reveals a strong O signal existing underneath the graphene seeds, along with density functional theory calculations.

Polyalcohol is one of the important medium temperature phase change materials (PCMs) for thermal energy storage, in which liquid-free solid–solid PCMs are more promising although sublimation can hardly be avoided when crystals transform to the “plastic phase”. We reported here the preparation of encapsulated Tris(hydroxymethyl)methyl aminomethane (...

The limited intrinsic conductivity of two-dimensional (2D) MoS2 nanosheets compromises its high electrocatalytic performance. In this work, we develop a facile method of simply dispersing MoS2 nanosheets into a water?isopropanol solution of high-conducting single-walled carbon nanotubes (SWCNTs) for preparation of MoS2/SWCNT composites. The SWCNTs...

Graphene-like two-dimensional materials (2DMats) show application potential in optoelectronics and biomedicine due to their unique properties. However, environmental and biological influences of these 2DMats remain to be unveiled. Here we reported the antibacterial activity of two-dimensional (2D) chemically exfoliated MoS2 (ce-MoS2) sheets. We fou...

A novel hole transport layer (HTL) composed of ultrathin two-dimensional (2D) MoS2 sheets decorated with 20 nm-sized gold NPs (MoS2@Au) was developed to make use of plasmonics for organic solar cells (OSCs). Both experimental and theoretical simulation revealed that the device with MoS2@Au composite as HTL showed the enhanced Jsc and efficiency com...

We report a simple solution-based approach to form ordered patterns of an indium tin oxide (ITO) electrode and underlying reasons for the improvement in power conversion efficiency (PCE) of organic solar cells (OSCs) built on the nanostructured ITO electrode. The patterning of ITO was achieved by using nanospheres as the template to erode ITO by we...

Graphene is composed of a single layer of carbon atoms arranged in a two-dimensional (2D) honeycomb lattice. It is a fundamental building block for a range of well-known carbon materials such as three-dimensional (3D) graphite, one-dimensional (1D) carbon nanotubes, and zero-dimensional (0D) fullerene. Recognizing the uniqueness of the 2D structure...