Author
Shuit-Tong Lee
Other affiliations: University of British Columbia, Hong Kong University of Science and Technology, University of Western Ontario ...read more
Bio: Shuit-Tong Lee is an academic researcher from Soochow University (Suzhou). The author has contributed to research in topics: Silicon & Nanowire. The author has an hindex of 138, co-authored 1121 publications receiving 77112 citations. Previous affiliations of Shuit-Tong Lee include University of British Columbia & Hong Kong University of Science and Technology.
Topics: Silicon, Nanowire, OLED, Electroluminescence, Diamond
Papers published on a yearly basis
Papers
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TL;DR: An effective cathode consisting of samarium (Sm) doped aluminum (Al) layer and a pure Al layer is reported for application in organic photovoltaic cells (OPVs) as discussed by the authors.
Abstract: An effective cathode consisting of samarium (Sm) doped aluminum (Al) layer and a pure Al layer is reported for application in organic photovoltaic cells (OPVs). Standard copper phthalocyanine (CuPc)/C60 OPVs using this bilayer cathode show dramatically increased short-circuit current density and power conversion efficiency, which are 64% increased by employing a appropriate ratio of 1:3 of Sm:Al layer as compared with that of control devices with pure Al cathode. The photoelectric properties reveal that the improved efficiency is mainly related to the balance of the enhanced electron collection ability and the optimized optical reflection of a Sm doped Al layer.
9 citations
Patent•
30 Sep 2015
TL;DR: In this article, a porous substrate and one-dimensional nano-material composite material were prepared through hydrothermal synthesis, and the composite material has the advantages of simple process, low cost, uniform distribution of the one dimensional nano material on the porous substrate, and compact interface combination.
Abstract: The invention relates to a porous substrate and one-dimensional nano-material composite material prepared through hydrothermal synthesis The preparation method of the composite material has the advantages of simple process, low cost, uniform distribution of the one-dimensional nano-material on the porous substrate, and compact interface combination The invention also relates to a surface-modified composite material and its preparation method The surface hydrophobicity modified composite can adsorb a plurality of organic solvents, such as toluene, dichlorobenzene, petroleum ether and the like, and also can adsorb a plurality of greases, such as gasoline, lubricating oil, machine oil, crude oil and the like, and the adsorption weight ratio is greater than 10
9 citations
TL;DR: Using the fullpotential linear-muffin-tin-orbital method, this article performed molecular-dynamics simulations for oxygen adsorption on Sin (n = 1-7) clusters.
Abstract: Using the full-potential linear-muffin-tin-orbital method, we have performed molecular-dynamics simulations for oxygen adsorption on Sin (n = 1-7) clusters. It is found that Si1, Si2 and Si3 can react with the O2 molecule directly to form small SiO2, Si2O2 and Si3O2 molecules. For the Si clusters with more than four Si atoms, the O2 molecule cannot be adsorbed on them directly, due to the potential barrier for dissociative chemisorption of O2. In contrast, atomic oxygen favours reactions with all the silicon clusters considered here. The formation of strong Si-O bonds makes the structures of the small Si clusters obviously distorted and their stabilities decreased. As for the fragmentation, the processes from SinO2 to Sin-2 + 2SiO are found to be energetically favourable. The theoretical investigations can help us to understand the existing experimental results.
9 citations
TL;DR: In this paper, the edge-enhanced Raman scattering effect was demonstrated on nanoedge array, depositing Au film on the profile of anodized aluminum oxide template with the pore diameter of 30 nm and the channel length of 50 µm.
Abstract: Edge-enhanced Raman scattering effect was demonstrated on nanoedge array, depositing Au film on the profile of anodized aluminum oxide template with the pore diameter of 30 nm and the channel length of 50 μm. The results showed a prominent superior Raman enhancement from the nanoedge array on the highly reproducible, uniform, and sensitive substrate with an enhancement factor of 107, which suggested the potential applications in ultrasensitive edge-enhanced Raman detection.
9 citations
TL;DR: In this article, the relation between work function and electronegativity was analyzed and the slope parameters of different organics were compiled, analyzed, and found to follow a linear relation with the inverse of the organics band gaps.
Abstract: Carrier injection barriers are often described as linear functions of metal’s work function or electronegativity. Slope of these functions are called the slope parameters of the organic materials. Using either the work function or the electronegativity relation has led to different slope parameters. This work discusses the discrepancy in the relation between the two slope parameters in literature. Using updated data, we analyzed the relation between work function and electronegativity. The slope parameters of different organics are compiled, analyzed, and found to follow a linear relation with the inverse of the organics’ band gaps.
9 citations
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TL;DR: This work reviews recent progress in graphene research and in the development of production methods, and critically analyse the feasibility of various graphene applications.
Abstract: Recent years have witnessed many breakthroughs in research on graphene (the first two-dimensional atomic crystal) as well as a significant advance in the mass production of this material. This one-atom-thick fabric of carbon uniquely combines extreme mechanical strength, exceptionally high electronic and thermal conductivities, impermeability to gases, as well as many other supreme properties, all of which make it highly attractive for numerous applications. Here we review recent progress in graphene research and in the development of production methods, and critically analyse the feasibility of various graphene applications.
7,987 citations
TL;DR: The theoretical charge capacity for silicon nanowire battery electrodes is achieved and maintained a discharge capacity close to 75% of this maximum, with little fading during cycling.
Abstract: There is great interest in developing rechargeable lithium batteries with higher energy capacity and longer cycle life for applications in portable electronic devices, electric vehicles and implantable medical devices. Silicon is an attractive anode material for lithium batteries because it has a low discharge potential and the highest known theoretical charge capacity (4,200 mAh g(-1); ref. 2). Although this is more than ten times higher than existing graphite anodes and much larger than various nitride and oxide materials, silicon anodes have limited applications because silicon's volume changes by 400% upon insertion and extraction of lithium which results in pulverization and capacity fading. Here, we show that silicon nanowire battery electrodes circumvent these issues as they can accommodate large strain without pulverization, provide good electronic contact and conduction, and display short lithium insertion distances. We achieved the theoretical charge capacity for silicon anodes and maintained a discharge capacity close to 75% of this maximum, with little fading during cycling.
6,104 citations
TL;DR: The beltlike morphology appears to be a distinctive and common structural characteristic for the family of semiconducting oxides with cations of different valence states and materials of distinct crystallographic structures, which could be an ideal system for fully understanding dimensionally confined transport phenomena in functional oxides.
Abstract: Ultralong beltlike (or ribbonlike) nanostructures (so-called nanobelts) were successfully synthesized for semiconducting oxides of zinc, tin, indium, cadmium, and gallium by simply evaporating the desired commercial metal oxide powders at high temperatures. The as-synthesized oxide nanobelts are pure, structurally uniform, and single crystalline, and most of them are free from defects and dislocations. They have a rectanglelike cross section with typical widths of 30 to 300 nanometers, width-to-thickness ratios of 5 to 10, and lengths of up to a few millimeters. The beltlike morphology appears to be a distinctive and common structural characteristic for the family of semiconducting oxides with cations of different valence states and materials of distinct crystallographic structures. The nanobelts could be an ideal system for fully understanding dimensionally confined transport phenomena in functional oxides and building functional devices along individual nanobelts.
5,677 citations
TL;DR: The state of the art, future directions and open questions in Raman spectroscopy of graphene are reviewed, and essential physical processes whose importance has only recently been recognized are described.
Abstract: Raman spectroscopy is an integral part of graphene research. It is used to determine the number and orientation of layers, the quality and types of edge, and the effects of perturbations, such as electric and magnetic fields, strain, doping, disorder and functional groups. This, in turn, provides insight into all sp(2)-bonded carbon allotropes, because graphene is their fundamental building block. Here we review the state of the art, future directions and open questions in Raman spectroscopy of graphene. We describe essential physical processes whose importance has only recently been recognized, such as the various types of resonance at play, and the role of quantum interference. We update all basic concepts and notations, and propose a terminology that is able to describe any result in literature. We finally highlight the potential of Raman spectroscopy for layered materials other than graphene.
5,673 citations
TL;DR: This paper presents a meta-analysis of the chiral stationary phase transition of Na6(CO3)(SO4)2, a major component of the response of the immune system to Na2CO3.
Abstract: Ju Mei,†,‡,∥ Nelson L. C. Leung,†,‡,∥ Ryan T. K. Kwok,†,‡ Jacky W. Y. Lam,†,‡ and Ben Zhong Tang*,†,‡,§ †HKUST-Shenzhen Research Institute, Hi-Tech Park, Nanshan, Shenzhen 518057, China ‡Department of Chemistry, HKUST Jockey Club Institute for Advanced Study, Institute of Molecular Functional Materials, Division of Biomedical Engineering, State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China Guangdong Innovative Research Team, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
5,658 citations