Wafer ≈ Wafer
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High-efficiency solution-processed perovskite solar cells with millimeter-scale grains Open
Large-crystal perovskite films The performance of organic-inorganic hybrid perovskite planar solar cells has steadily improved. One outstanding issue is that grain boundaries and defects in polycrystalline films degrade their output. Now, …
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Synthesis of Graphene Oxide using Modified Hummers Method: Solvent Influence Open
The aim of this study is to study the influence of different solvents on the structure and electrical properties of graphene oxide. GO was obtained from graphite flakes by using modified hummers method in which different from conventional …
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Silicon Nanowires for Solar Thermal Energy Harvesting: an Experimental Evaluation on the Trade-off Effects of the Spectral Optical Properties Open
Silicon nanowire possesses great potential as the material for renewable energy harvesting and conversion. The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy a…
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Review Article: Stress in thin films and coatings: Current status, challenges, and prospects Open
The issue of stress in thin films and functional coatings is a persistent problem in materials science and technology that has congregated many efforts, both from experimental and fundamental points of view, to get a better understanding o…
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Status and Potential of Lithium Niobate on Insulator (LNOI) for Photonic Integrated Circuits Open
Lithium niobate on insulator (LNOI) technology is revolutionizing the lithium niobate industry, enabling higher performance, lower cost and entirely new devices and applications. The availability of LNOI wafers has sparked significant inte…
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ASAP7: A 7-nm finFET predictive process design kit Open
We describe a 7-nm predictive process design kit (PDK) called the ASAP7 PDK, developed in collaboration with ARM Ltd. for academic use. The PDK is realistic, based on current assumptions for the 7-nm technology node, but is not tied to any…
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Silicon heterojunction solar cells with up to 26.81% efficiency achieved by electrically optimized nanocrystalline-silicon hole contact layers Open
Silicon heterojunction (SHJ) solar cells have reached high power conversion efficiency owing to their effective passivating contact structures. Improvements in the optoelectronic properties of these contacts can enable higher device effici…
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Coupling strategies for silicon photonics integrated chips [Invited] Open
Over the last 20 years, silicon photonics has revolutionized the field of integrated optics, providing a novel and powerful platform to build mass-producible optical circuits. One of the most attractive aspects of silicon photonics is its …
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Lithium niobate photonics: Unlocking the electromagnetic spectrum Open
Lithium niobate (LN), first synthesized 70 years ago, has been widely used in diverse applications ranging from communications to quantum optics. These high-volume commercial applications have provided the economic means to establish a mat…
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Solar Cells: In Research and Applications—A Review Open
The light from the Sun is a non-vanishing renewable source of energy which is free from environmental pollution and noise. It can easily compensate the energy drawn from the non-renewable sources of energy such as fossil fuels and petroleu…
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Ultra-thin chips for high-performance flexible electronics Open
Flexible electronics has significantly advanced over the last few years, as devices and circuits from nanoscale structures to printed thin films have started to appear. Simultaneously, the demand for high-performance electronics has also i…
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Wafer-Scale Synthesis of High-Quality Semiconducting Two-Dimensional Layered InSe with Broadband Photoresponse Open
Large-scale synthesis of two-dimensional (2D) materials is one of the significant issues for fabricating layered materials into practical devices. As one of the typical III-VI semiconductors, InSe has attracted much attention due to its ou…
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Four-Junction Wafer-Bonded Concentrator Solar Cells Open
The highest solar cell conversion efficiencies are achieved with four-junction devices under concentrated sunlight illumination. Different cell architectures are under development, all targeting an ideal bandgap combination close to 1.9, 1…
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Scalable Fabrication and Integration of Graphene Microsupercapacitors through Full Inkjet Printing Open
A simple full-inkjet-printing technique is developed for the scalable fabrication of graphene-based microsupercapacitors (MSCs) on various substrates. High-performance graphene inks are formulated by integrating the electrochemically exfol…
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Wafer-scale growth of large arrays of perovskite microplate crystals for functional electronics and optoelectronics Open
Scalable growth of regular arrays of perovskite microplates opens a new platform for electronic and optoelectronic device arrays.
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Controlled crack propagation for atomic precision handling of wafer-scale two-dimensional materials Open
Cleaving with a metal handle Using adhesive tape to pull off monolayers of two-dimensional (2D) materials is now a well-established approach. However, the flakes tend to be micrometer scale, and the creation of multilayer stacks for device…
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Phase-controlled van der Waals growth of wafer-scale 2D MoTe2 layers for integrated high-sensitivity broadband infrared photodetection Open
Being capable of sensing broadband infrared (IR) light is vitally important for wide-ranging applications from fundamental science to industrial purposes. Two-dimensional (2D) topological semimetals are being extensively explored for broad…
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Wafer-scale heterostructured piezoelectric bio-organic thin films Open
Piezoelectric bioorganic thin films Piezoelectric materials enable a reversible conversion between mechanical pressure and electric charge and are useful for sensors, actuators, and high-precision motors. Yang et al. developed a method for…
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Wafer-scale, layer-controlled organic single crystals for high-speed circuit operation Open
A wafer-scale, 2D organic single-crystalline semiconductor revolutionizes near-field communication.
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Shallow Iodine Defects Accelerate the Degradation of α-Phase Formamidinium Perovskite Open
Shallow defects are mostly benign in covalent semiconductors, such as silicon, given that they do not constitute non-radiative recombination sites. In contrast, the existence of shallow defects in ionic perovskite crystals might have signi…
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Nano-optical designs for high-efficiency monolithic perovskite–silicon tandem solar cells Open
Perovskite–silicon tandem solar cells offer the possibility of overcoming the power conversion efficiency limit of conventional silicon solar cells. Various textured tandem devices have been presented aiming at improved optical performance…
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Residual Metallic Contamination of Transferred Chemical Vapor Deposited Graphene Open
Integration of graphene with Si microelectronics is very appealing by offering a potentially broad range of new functionalities. New materials to be integrated with the Si platform must conform to stringent purity standards. Here, we inves…
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Dielectric surface passivation for silicon solar cells: A review Open
Silicon wafer solar cells continue to be the leading photovoltaic technology, and in many places are now providing a substantial portion of electricity generation. Further adoption of this technology will require processing that minimises …
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Photo-induced non-volatile VO2 phase transition for neuromorphic ultraviolet sensors Open
In the quest for emerging in-sensor computing, materials that respond to optical stimuli in conjunction with non-volatile phase transition are highly desired for realizing bioinspired neuromorphic vision components. Here, we report a non-v…
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Two-Dimensional Materials in Large-Areas: Synthesis, Properties and Applications Open
Large-area and high-quality two-dimensional crystals are the basis for the development of the next-generation electronic and optical devices. The synthesis of two-dimensional materials in wafer scales is the first critical step for future …
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Wafer-scale synthesis of monolayer two-dimensional porphyrin polymers for hybrid superlattices Open
Single-layer porphyrin polymerization Two-dimensional polymers can be made as monolayer sheets through controlled synthesis at an interface. However, it is often difficult to create intact sheets over large areas that can be transferred on…
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High‐resolution, high‐throughput imaging with a multibeam scanning electron microscope Open
Summary Electron–electron interactions and detector bandwidth limit the maximal imaging speed of single‐beam scanning electron microscopes. We use multiple electron beams in a single column and detect secondary electrons in parallel to inc…
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Micro-ring resonator quality factor enhancement via an integrated Fabry-Perot cavity Open
We propose and experimentally demonstrate the enhancement in the filtering quality (Q) factor of an integrated micro-ring resonator (MRR) by embedding it in an integrated Fabry-Perot (FP) cavity formed by cascaded Sagnac loop reflectors. B…
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Impact of sample storage type on adventitious carbon and native oxide growth: X-ray photoelectron spectroscopy study Open
The type and degree of contamination on surfaces intended for X-ray photoelectron spectroscopy (XPS) studies is considered decisive for meaningful and reliable analysis as in many cases in-situ cleaning methods are not applicable or otherw…
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Seed‐Crystal‐Induced Cold Sintering Toward Metal Halide Transparent Ceramic Scintillators Open
Scintillators with high spatial resolution at a low radiation dose rate are desirable for X‐ray medical imaging. To challenge the state‐of‐art technology, it is necessary to design large‐area wafers with high light yield, oriented light tr…